systems systems

62000 km of backbone DWDM networks

DEVELOPMENT l DESIGN l INSTALLATION

DWDM systemsDWDM systems

ww

w.t8

.ru

Super channel

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WORLD RECORD

1 Tbit/s capacity was achieved in a DWDM system with 100G channels in a single-span fiber optic line with a length of more than 500 km. Remote optically pumped amplifiers (ROPA) were used to increase the range of transmission of the ten 100G channels. The world record became available because of the high quality of 100G transponders with DP-QPSK modulation as well as unique signal processing algorithms developed by T8.

100 Gbit/s is a speed of a signal. The full speed of data transmission in the DWDM line including FEC is 120 Gbit/s. The coherent 100G transponders of “T8” have the best threshold of detection among existing analogs. Optical signal-to-noise ratio that is required for correct detection of a signal (OSNRt) is only 12.5 dB. This value is close to theoretical limit for 100G channels. A combination of advanced technologies is used in 100G transponders of “T8” including Dual-Polarization QPSK modulation, digital dispersion compensation up to 75 000 ps/nm, Soft-FEC error correction.

Record range of 10*100 Gbit/s transmission in a single-span DWDM system

EDFA2

MU

X

Transponders 10 x 100GA remote pumping amplifier

(ROPA1)

1480 nm

Removing the pump

EDF1

1480 nm

A remote pumping amplifier(ROPA2)

Removing the pump

EDFA1

1450 нмCounter Raman pumping

1480 nm1390 nm1480 nm

500 km

EDF2Span1 Span2 Span3WDM WDM WDM WDM WDM

WDM

1320

DCF

TXTXTXTXTXTXTXTX

21ch22ch23ch24ch25ch26ch27ch28ch

TXTX

29ch30ch

RXRXRXRXRXRXRXRX


RXRX

29ch30ch

Transponders 10 x 100G

DEM

UX

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About company ............................................................................................................. 4

DWDM equipmentVolga multiservice platform .......................................................................................... 6Volga cross-connect platform ....................................................................................... 8400G equipment ........................................................................................................... 9100G equipment ......................................................................................................... 1040G equipment ........................................................................................................... 1210G equipment ........................................................................................................... 132,5G equipment .......................................................................................................... 16Optical fiber amplifiers EDFA and RAMAN ................................................................. 18Hybrid amplifier EDFA + RAMAN ................................................................................ 19Remote optically pumped amplifier ROPA ................................................................ 19Optical units ................................................................................................................. 20Optical spectrum analyzer OPM ................................................................................. 20ROADM – the solution for multichannel networks .................................................... 21

DWDM and СWDM compact systems100G DWDM system V1-MS-100E ............................................................................ 22DWDM system 10*10 Gbit/s V1-TT-C10E ................................................................ 23DWDM/CWDM system 8*10 Gbit/s V1-TO-10 ......................................................... 243U Compact Metro DWDM system ............................................................................ 25

Network management systemFractal NMS network management system .............................................................. 26

Development and designDWDM lines with long spans ...................................................................................... 28Multispan DWDM lines ............................................................................................... 29Measurements of optical transmission systems ...................................................... 30DWDM network design ............................................................................................... 30Training center ............................................................................................................ 31Technical support ........................................................................................................ 31

Fiber-optic security systemDunay distributed fiber-optic security system ........................................................... 32

FeedbackFeedback from our customers ................................................................................... 34

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T8 is a leading manufacturer of wavelength-division multiplexing telecom equipment (DWDM and CWDM) in Russia and CIS countries. We develop and produce a line of DWDM and CWDM equipment with a channel speeds up to 400 Gbit/s. All T8 equipment is being developed and manufactured in Russia. To produce our equipment we use the best components from Europe, US, Japan, Russia and other countries. More than 170 people are working in our company, including 2 professors and 17 PhDs.

The company entered the list of top-ten most innovative companies of Russia according to the “TechUp-2014” ranking and became one of 30 leading Russian high-tech companies with the rapid development. T8 won CNEWS AWARD 2013 competition in nomination “Russian Technologies”. The activity of T8 was many times awarded by a Laser Association.

In 2014 the company won a competition of a Russian state corporation “ROSTECH” in a field of photonics with a project of a new DWDM-system. In 2015 the company was nominated for the award of the government of the Russian Federation «Industry»

A large part of our profit is re-invested in scientific research and development that allow us to keep place with the world leading manufacturers of CWDM and DWDM equipment. T8 has its own R&D Center which is a resident of the Skolkovo innovation center, as well as the best-equipped measurement laboratory in Russia.

Every year our specialists publish dozens of scientific articles in international and Russian journals, and obtain patents for new scientific research results. Based on researches performed in our R&D Center, we established several world records in 100 Gbit/s signal transmission:

• 100G transmission over 4250 km in real Moscow - Novosibirsk DWDM system without dispersion compensator modules (DCM) or signal regeneration;

• 10*100G transmission over 500 km in a single-span fiber optic line with use of remote optically pumped amplifiers (ROPA)

One of our fiber optic products is a “Dunay” security system. It is intended for monitoring of security zones of extended objects like oil and gas pipelines, communication lines, state border, or perimeters of large industrial and special objects.

Developing of a modern telecom equipment and implementation of innovative technologies require a creative approach and high professionalism from our employees. Not only gurus of modern technologies but also recent graduates are working in our company.

We created a training school for education of young specialists, we choose and promote the best graduates of leading Russian universities such as MIPT, MSU, Bauman MGTU and others. Because of that we are a leading Russian company in production and installation of high-tech telecom equipment. We are proud to contribute in development of the Russian economy.

T8 offers integrated solutions for building DWDM systems on a turnkey basis including design, supply, installation and maintenance of the equipment. The T8 is an ISO 9001 certified company.

Qualification of our engineers is enough to perform projects of any difficulty level both for backbone and regional DWDM networks.

T8 – Technologies of InfinityAbout the company

General Director of T8, Treshchikov Vladimir PhD

About the company

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Main fields of our activity are:

• Development and manufacturing of CWDM and DWDM equipment

• Pre-design analysis of a fiber optic line • Principle design, calculation and engineering

design of a network • Installation of equipment • Maintenance and technical support of

equipment • Development of a fiber optic security and

monitoring system “Dunay”

The company has profound technical abilities that allow us to solve any kind of tasks. Having large practical experience of installation of complex DWDM systems in different climatic conditions, we can overcome any non-standard situation with high quality and in strict terms. Mobile groups of engineers and welders permanently work in staff and provide immediate response to any situations.

We calculate more than 200 projects every year, and dozens of them come to a stage of implementation. High quality of our projects is remarked by positive references and recommendations. We have installed more than 62,000 km of DWDM systems, and more than 10,000 km of them are high-speed 100G channels.

Our key customer in Russia is the Rostelecom Corporation. Also our customers are: telecom operators, system integrators, government agencies, data processing centers, industrial companies.

Among our projects are:

• DWDM network for Sochi 2014 Winter Olympics;

• DWDM networks for Rostelecom – Siberia, North-West, Volga (more than 37,500 km);

• Backbone networks in Kazakhstan (more than 9000 km).

About the company

The company built a DWDM network for Sochi 2014; part of the network was built using 100G DWDM

system Volga

Checking the finished product

Development circuitry equipment

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Volga DWDM platformTo increase a performance of your network due to high-speed device

DWDM equipment

The new multiservice platform for building of high-speed DWDM networks Volga supports channel speed 400 Gbit/s. The Volga platform chassis can be installed in 19 or 21 inch telecommunication racks. Volga platform is optimized for the use of 40G and 100G transponders. It has new power supplies, cooling and internal management systems.

• 4 chassis types: 13 slots in 10U, 7 slots in 6U, 3 slots in 3U or 1 slot in 1U

• Transponders and aggregators from 2,5G to 400G

• Optic amplifiers: EDFA, RAMAN and gybrid EDFA+RAMAN

• ROADM: WSS 1x1, 1x2, 1x4, 1x9 • Two slots for power supplies: 650, 850,

1200 or 1600W • Chassis depths — 300 mm

The DWDM-system Volga was assigned the status of equipment of Russian origin by the Ministry of Industry and Trade of the Russian Federation. It had passed the state examination and was entered in the register of innovative products that are recommended to the procurement in the scope of 94-FZ and 223-FZ federal laws.

Powerful DWDM transmission: 40, 80 or 96 channels 100G each, 48 channels 400G

Transponders support the line speeds 100, 40, 10, 2.5G. The hot upgrade without traffic interruption is possible. The use of coherent detection and Soft-FEC in new 400G/100/40/10G transponders makes the transmission characteristics of these transponders very solid and enables them to work in old lines together with existed 2,5G channels. Due to high fault-tolerance of 100G DWDM transponder, the transmission on distances of up to 4250 km without dispersion compensators in the line with cascade of amplifiers is possible, as well as the 500 km point-to-point transmission with the use of Remote Optically Pumped Amplifiers (ROPA).

Space efficiency in the rackA line of different form-factor chassis with 13 slots, 7 slots, 3 slots for the convenience of network construction and subsequent renovation and expansion of channel

capacity. Each transponder of the Volga platform is also available in 1U standalone version, including 400 Gbit /s equipment.

Flexibility and network protection: 1+1 and add/drop, ROADM

• ROADM is a flexible output of optical channels for network protection and upgrade

• Protection 1+1 at speeds of 2.5, 10G - two line interfaces

• Aggregators 10x10G, 4x10G, 4x2.5G, 8x1GE • BS cards – optical protection of expensive

interfaces 40G and 100G/400G

Modules of the platform support OTN X-connect with capacity of switching matrix of 40 or 100 Gbit/s. The next generation of equipment will support OTN Switch with capacity of up to 1 Tbit/s. DWDM system Volga supports up to 96 channels in C-band and have an option of additional extension in L-band to achieve transmission capacity of up to 27 Tbit/s. All Volga equipment has a full support of OTN technology. System elements (optical transponders, amplifiers, aggregators, control units or power supplies) can be replaced in a hot mode, i.e. without turning off the equipment and traffic loss. Optical switching cards enable building 1+1 protection networks and ring topology networks.

10U chassis with 13 slots

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DWDM equipment

The Volga platform key features

High channel capacityTransmission up to 96 DWDM channels of up to 100 Gbit/s each or 48 up to 400Gbit/s. Up to 270 channels in expanded C+L band. Client interfaces SDH, OTN, Ethernet:

• 400G: 100GE • 100G: 100GE • 40G: STM256, OTU3, 40G Ethernet • 10G: 10GbE, STM64, OTU2, 4/8/10GFC • ≤2,5G: GbE, STM1/4/16, OTU1

OTN technology supportTransponders and muxponders-aggregators transfer traffic in the OTN OTU1/2/3/4 format. OTN capacity matrix 40 or 100 Gbit/s. The next generation will support OTN-matrix to 1Tbit/s. Support of FEC and Super-FEC error correction algorithms increases the signal transmission quality.

Implementation of complex topologies Due to using of WSS ROADM 1x2, 1x4, 1x9 and different types of aggregators and path-protection cards the Volga platform perfectly fits for constructing DWDM networks of different topologies with 1+1 protection, both ring and mesh. High speed optical end electronic switches, powerful digital signal processor in 100G transponders make possible to build redundant links with very fast reconfiguration (<50 ms) in case of failure.

Wide range of optical amplifiersLow-noise erbium-doped fiber amplifiers (EDFA), Raman amplifiers (RAMAN) with a power of up to 33 dBm, remote optically pumped amplifiers (ROPA), hybrid amplifiers EDFA + RAMAN

Fractal network management system Enables controlling all nodes at the network map with a color-coded indication. The graphical framework Fractal and the built-in Web-server significantly simplify operations on remote configuring of the Volga platform.

Dimensions and power consumptionDoubled power units: DC 36–72 or AC 220 V. Power consumption no more than 1200 W. Chassis height 1/3/6U and 10U, depth 300 mm, rack mounting in 19 and 21 inch racks.

Platform Volga is the best solution to build high-speed networks with wavelength division multiplexing.

3U compact and inexpensive solution for 3 slots.

1U solution for small spaces.

6U chassis with 7 slots.

All equipment has the necessary certificates. The DWDM-system “Volga” was assigned the status of equipment of

Russian origin by the Minpromtorg Russia.

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The first Russian OTN cross-connector “Volga” performs digital switching of ODU0/1/2/3/4 streams in non-blocking mode with a total capacity of up to 900 Gbit/s.

OTN cross-connector provides telecom operator with a powerful tool for remote management of the client traffic allocation over transport optical channels. With the OTN cross-connection, each client port is no more linked permanently to a particular transport channel (as in the muxponder): client traffic can be switched manually to any line interface using the management system, or switched automatically depending on the current load of transport channels. Efficient use of the huge bandwidth of the upcoming super-channels (500G, 1T) is possible only with the use of OTN cross-connectors with digital switching matrix.

New Russian cross-connector “Volga” will help telecom operators to achieve new level of network control and provide unmatched management flexibility.

Technical characteristics of “Volga” cross-connector:

• Up to 9 cards of two types in any combination: - 10x10G client card - 100G line card

• 1 or 2 cross-connection cards • Up to 900 Gbit/s in one chassis (10U size, 300

mm depth) • 2 control and intercommunication units

- Full redundancy for control units • Four slots for power supplies 1600 W

- Power consumption 3200 W - Full redundancy for power supply

The device has 11 slots: 9 slots of general purpose for installation of interface cards and 2 slots for installation of cross-connect cards. Two active control units provide robust and redundant management of the chassis. Each control unit has independent control channel to each element of the chassis. Both control units are connected to the management system of the network.

Flexibility and Network Protection

The devise supports redundancy 1+1 for cross-connector card, 2+2 for power supply units, and 1+1 for control unit.

OTN cross-connector provides full control of separate ODU streams in data channels entering client and line ports (OTU2 - 10G and OTU4 - 100G). Switching granularity is ODU0 (1,25G). Any ODU0/1/2/3/4 stream from any client or line interface can be switched to any other interface.

The chassis is managed with the EMS/NMS “Fractal” and with standard network protocols.

OTN cross-connector “Volga” supports:

• Line channels: OTU2, OTU4. • Client channels: 100G, 10G

(10GE, STM256, OTU2).

ROADM Capability

Reconfigurable optical add-drop multiplexers (ROADMs) can be used for management of separate wavelengths in DWDM network, for example, for their redirection to one or another route.

ROADM commutation can be used simultaneously with OTN cross-connection. ROADM enables management of data flows on the level of optical channels (wavelengths), for example, by switching a 100G channel to one or another route of the backbone network. OTN cross-connection enables management of data flows on the level of separate ODU containers, for example, by switching low-speed client data streams to one or another high-speed optical channel.

The Volga cross-connect DWDM platformTo increase a performance of your network due to high-speed device

New generation DWDM equipment

full support

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• Transmits up to 4 client signals 100GE (103.125 Gbps) or OTU4 RS FEC (111.81 Gbps) • SD-FEC 15% and 25% error correction algorithm • Reconfigurable in C-band laser • 2xDP-16QAM Line interface/flex rate

Aggregating transponder (muxponder) combines 4x100 Gbit/s client channels and transmits them in a two DWDM channels. The MS-400E, converts data into the OTN format and uses the new coherent SD-FEC error correction.The laser with a reconfigurable according to ITU-T 100 GHz enables organizing up to 48 DWDM channels 400G within the C-band according to ITU-T 100 GHz.

Supports two individual line-side channels and each channel can be programmed to 100G PM-QPSK, 150G PM-8QAM and 200G PM-16QAM for optimization of reach versus capacity. Transponder supports both differential phase and absolute phase for all the modulation formats.

Aggregating transponder MS-400ETransmits 4x100 Gbit/s client signals in two subcarriers DWDM channel 2xDP-16QAM

New generation DWDM equipment

Parameter Value

Line interface, line bit rate / payload 1x120 Gbit/s 2x180 Gbit/s 2x240 Gbit/sOutput power with an optical amplifier -10 ... +2.5 dBmOperational wavelength range of a transmitter 1528.7–1567.1 nmReceiver overload (BER=10-12) 0 dBmReceiver sensitivity (BER=10-12) -18 dBmPower consumption 150 WLine-side channels 100G 150G 200GOSNRT (0.1 nm, BER=10-12) 10,2 dB 14,7 dB 18,1 dBModulation 25% OH SD-FEC DP-QPSK DP-8QAM DP-16QAMAutomatic dispersion correction up to ± 70 ns/nm ± 30 ns/nm ± 30 ns/nm

Optical characteristics

Line In 1

Line Out 1

λ1

Line In 2

Line Out 2

λ2

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Оборудование DWDM100G equipment

Transponder ТS-100ETransmits 100 Gbit/s 100GE client signals in DWDM channel with Soft-FEC

• Transmits 100 Gigabit Ethernet client signals • Supports 100G clients protocol L4 (4*25G) and SR10 (10*10G) • OTU4 line interface, 120 Gbit/s • Coherent DP-QPSK modulation format • Reconfigurable in C-band laser • Up to 96 channels in accordance with 50 GHz wavelength channel plan • Soft-FEC error correction algorithms • Automatic dispersion correction up to ± 70000 ps/nm • OSNRT = 11 dB (0.1 nm, BER = 10 -12)

Parameter Value

Line interface, line bit rate / payload OTU4, 120 / 103 Gbit/sOutput power with an optical amplifier -5 ... 0 dBmOperational wavelength range of a transmitter 1528.7–1567.1 nmReceiver sensitivity (BER=10-12) -18 dBmReceiver overload (BER=10-12) 0 dBmOSNRT (0.1 nm, BER=10-12) 11 dBPower consumption 150 W

TS-100E transponder executes 3R regeneration and transforming of 100 Gbit/s 100 Gigabit Ethernet client signal into an OTN, transmits data into a line using the OTN OTU4 format and uses powerful Soft-FEC error correction algorithms. Data transmission is executed at a stabilized wavelength according to a DWDM grid. The reconfigurable laser enables organizing up to 96 DWDM channels within the C-band according to ITU-T 50 GHz.

Client In

Client Out

100GE

Tx

Line In

Line Out

DWDM

Tx

Rx

OTN

FECOTU4CFP 3R

Coherent

Rx


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Оборудование DWDM


100G equipment

• Transmits 10 client signals of 10GE, STM-64, OTU2, 8/10 GFC • Service channel ESC in line interface • Soft-FEC 15% error correction algorithm • Coherent DP-QPSK modulation format • Reconfigurable in C-band laser • Up to 96 channels in accordance with 50 GHz wavelength channel plan • Automatic dispersion correction up to ± 125000 ps/nm • OSNRT from 11 dB (0.1 nm, BER = 10 -12)

Two worldwide records in data transmission were established!

Aggregating transponder (muxponder) combines 10x10 Gbit/s client channels and transmits them in a DWDM channel. The MS-100E-T10 executes 3R regeneration, converts data into the OTN OTU4 format and uses the powerful Soft-FEC error correction algorithm.The transponder transfers data at a stabilized according to ITU-T 50 GHz according to the DWDM grid. The laser with a reconfigurable according to ITU-T 50 GHz enables organizing up to 96 DWDM channels within the C-band according to ITU-T 50 GHz.


Parameter MS-100E-T10 MS-100E-Т10-SHLine interface, line bit rate / payload OTU4, 120 / 10*10 Gbit/sClient interfaces’ standards 10GE, STM-64, OTU2, 8/10 GFC Output power -5 ... 0 dBm -15 ... 1 dBmOperational wavelength range of the transmitter 1528.7–1567.1 nmReceiver sensitivity (BER=10-12) -18 dBm -21 dBmReceiver overload (BER=10-12) 0 dBmAutomatic dispersion correction up to ± 70/125 ns/nm up to ± 22 ns/nm

OSNRT (0,1 nm, BER=10-12) 11 dB (Soft-FEC 20%)12.5 dB (Soft-FEC 15%) 14.5 dB (Soft-FEC 15%)

Power consumption ≤165 W ≤125 W

Aggregating transponder MS-100ETransmits 10x10 Gbit/s client signals in 100 Gbit/s DWDM channel with Soft-FEC

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40G equipment

Parameter TS-40E MS-40E

Client signals STM-256, 40GE 4 x ( 10GE, STM-64, OTU2, 8/10GFC)

Line bit rate OTU3, 43 Gbit/sOutput power without an optical amplifier -10 ... +1.5 dBmOperational wavelength range of a transmitter 1528.7–1567.1 nmReceiver sensitivity (BER=10-12) -20 dBmReceiver overload (BER=10-12) 0 dBmPower consumption ≤90 W

40G transponder & muxponderTransmits 40 Gbit/s client signals via DWDM channel with Super-FEC

Transponder executes 3R regeneration and transforming of a 40 Gbit/s SDH STM-256 client signal into an OTN, transmits data using the OTN OTU3 format (43 Gbit/s).

Aggregating transponder (muxponder) combines 4x10 Gbit/s client channels and transmits them into a DWDM channel. In any of the 4 channels change the type of client load can be non-stop line of traffic.

Equipment executes 3R regeneration, and uses the powerful Super-FEC G.975 I.7 error correction algorithm. Data transmission is executed at a stabilized wavelength according to a DWDM grid. The laser with a reconfigurable wave length enables organizing up to 96 DWDM channels with the C-band ITU 50-GHz wavelength channel plan.

Client In

Client Out

STM-64Rx

Tx

Line In

Line Out

OTU3 DWDMTx

RxOTNFEC Coherent

Rx


• OTU3 line interface, 43 Gbit/s • Super-FEC G.975 I.7 error correction algorithm • Coherent DP-QPSK modulation format • Reconfigurable in C-band laser • Up to 88 channels in accordance with 50 GHz wavelength channel plan • Automatic correction dispersion up to ± 55000 ps / nm • OSNRT = 9.0 dB (0.1 nm, BER = 10 -12)

Rx

Tx

Client In 1

Client Out 1

10GE, STM-64, OTU2DFB

Rx

Tx

Client In 2

Client Out 2

10GE, STM-64, OTU2 XFPDFB

Rx

Tx

Client In 3

Client Out 3


Rx

Tx

Client In 4

Client Out 4


DWDM

Tx

Line In

Line Out

OTU3Rx

OTNFEC

XFP

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10G equipment

• Transmits client signals of 10GE, SDH STM-64, 8/10 GFC • Line interface OTN OTU2 • 10 transponders on the 10G in a single unit • Super-FEC G.975 I.7 error correction algorithm • Line and client interfaces SFP+

Rx

TxSFP+

Rx

TxSFP+

Rx

TxSFP+

Rx

TxSFP+DFB

Line In 1

Line Out 1

OTU2

TT-10EDWDM

Rx

TxSFP+DFB

Line In 2

Line Out 2

OTU2

Rx

TxSFP+DFB

Line In 10

Line Out 10

OTU2

Client Out 1

Client In 1

10GE, STM-64,GFC/10GFC8

Client Out 2

Client In 2


Client Out 10

Client In 10


OTNSuperFEC

X-Connect

. . .

. . .

. . .

. . .

Десна 2

λ1

λ2

λ10

Parameter ValueLine bit rate OTU2, 10 Gbit/sOutput power without an optical amplifier -1 ... +3 dBm *Quantity SFP/SFP+ 10Operational wavelength range of a transmitter 1528.7-1527.1 nmReceiver sensitivity (BER=10-12) -24 dBm *Receiver overload (BER=10-12) -7 dBm *Power consumption ≤85 W

*Depending on the type SFP+

Transponder ТT-C10E10 transponders 10 Gbit/s with Super-FEC and OTN X-connect


10-channel 10G transponder with Super-FEC supports any 10 Gbit/s data formats on client interfaces: 10 GE, STM-64 etc. Each client channel is converted in OTN OTU2 format and sent to the selected line port. All channels on the line side can be combined by an external multiplexer for transmission in a single fiber using CWDM or DWDM technology. Tunable SFP+ or “color” SFP/SFP+ with a fixed wavelength can be used on each line port. The use of standard SFP+ connectors significantly increases the cost-efficiency of the solution. High port density enables effective usage of the rack space. The device can be configures in 5-channel mode with a line redundancy 1+1. In this case each client channel is sent to two line ports: main and backup. These two line channels bearing the same client channel can be transmitted on different fibers or with OTN X-connect between the channels. The transponder supports Super-FEC error correction that guarantees a high quality of 10G signal. Equipment

is fully compatible with OTN networks. OTN provides powerful capabilities for channel management, signal monitoring, and traffic statistic analysis.

full support

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10G equipment

Transponder TD-10ETransmits 10 Gbit/s client signals in DWDM channel with Super-FEC

• Transmits 1/2 client signals of 10GE, STM-64, OTU2, 4/8 GFC • OTN OTU2 line interface • Super-FEC G.975. I.7 with a redundancy up to 25% or FEC G.709 • 1+1 protection for linear and ring DWDM systems • Reconfigurable in C-band laser • Up to 88 channels in accordance with 50 GHz wavelength channel plan • OSNRT = 9.0 dB (0.1 nm, BER = 10 -12)

Dual TD-10E transponder executes 3R regeneration of a 10 Gbit/s client optical signal and transforms a wavelength into an optical DWDM channel. Reconfigurable in C-band laser can be used for organization of up to 96 DWDM channels in accordance with the 50 GHz wavelength channel plan. The FEC version corrects errors according to FEC G.709 or Super-FEC ITU G.975 I.7 standards.

Rx

Tx Rx

Tx

Line In 1

Line Out 1

OTU2

Client In 1

Client Out 1

10GE, STM-64, OTU2

Rx

Tx Rx

Tx

Line In 2

Line Out 2

OTU2

DWDMClient In 2

Client Out 2

10GE, STM-64, OTU2

XFP

XFP

OTNFEC

Parameter TD-10 TD-10F TD-10ELine bit rate OTU-2, from 11.10 Gbit/sClient interfaces’ standards 10GE, STM-64, OTU2Output power <+4 dBmOperational wavelength range of the transmitter 1528.7–1567.1 nm Receiver sensitivity -18 /- 24 dBm *Receiver overload -5 ... -3 dBm

Error correction algorithm none FEC G.709 SuperFEC ITU G.975 I.7

Power consumption ≤ 45 W


* Specifying in order

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10G equipment

Aggregator MS-DC10FXTransmits up to 8 client signals in OTU2 channel with FEC and OTN X-connect

• Transmits client signals of GE and SDH STM-1/4/16, OTU1 • 2 lines interfaces OTN OTU2, 10 Gbit/s • Error correction algorithm G.709 • Aggregates 4xSTM-16, 8xSTM 1/4, 4xOTU1, 8xGE or multipurpose channels up to 10 Gbit/s • OTN X-connect matrix from 40 Gbit/s • 2 lines outputs in the form of a DWDM XFP or reconfigurable in C-band laser • Up to 88 channels in accordance with 50 GHz wavelength channel plan

Aggregator MS-DC10FX combines 8 client channels Gigabit Ethernet, SDH STM-16 (or their arbitrary combination) in two line channels OTN OTU2, 10 Gbit/s. The device supports cross-commutation on the ODU0/ ODU1 level. Aggregator performs 3R-regeneration of the signal, and error correction according to G.709. Two types of line interfaces are supported: XFP-modules and tunable lasers.

Rx

TxSFP

Rx

TxSFP

Rx

TxSFP

Rx

TxXFPDFB

Line In 1

Line Out 1

OTU2

DWDM

Rx

TxXFPDFB

Line In 2

Line Out 2

OTU2

Client Out 1

Client In 1

Client Out 2

Client In 2

Client Out 8

Client In 8

GE, OTU1STM-1/4/16

GE, OTU1STM-1/4/16

GE, OTU1STM-1/4/16

OTNFEC

X-Connect

. . .

. . .

λ1

λ2

DFB

DFB

DFB

Parameter MS-DC10FX-Q3F MS-DC10F-Q3FLine bit rate 2xOUT2, 10.7 Gbit/sInterface type XFP MSAQuantity client interfaces 4/8Client interfaces’ standards 4 x (STM-16/OTU1) или 8 х (GbE/STM-1/STM-4)Output power defined by XFP < +4 dBmOperational wavelength range of the transmitter - 1528.7-1567.1 nmReceiver sensitivity - -18 / -24 dBmReceiver overload - -5 ... -3 dBmPower consumption ≤ 35 W


full support

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Оборудование DWDM2,5G equipment

Transponder ТQ-3ES4 transponders up to 2,67 Gbit/s in DWDM channel with Super-FEC

• Transmits GE, SDH STM-1/4/16 client signals • Super-FEC G.975 I.3 or FEC G.709 error correction algorithm • 4 transponders in one unit

TQ-3ES transponder executes 3R regeneration of a 10 Gbit/s client optical signal and transforms a wavelength into an optical DWDM channel. Reconfigurable in C-band laser with the 50 GHz wavelength channel plan. The FEC version corrects errors according to FEC G.709 or Super-FEC ITU G.975 I.3 standards.

SFP module is used as a line interface of the aggregator. DWDM SFP can be used for data transmission in DWDM network.

Parameter TD-3Line bit rate 155 Mbit/s –2.67 Gbit/s Client interfaces’ standards GE, SDH STM-1/4/16Output power -2.5 ... +4.5 dBmOperational wavelength range of a transmitter 1528.7–1567.1 nmReceiver sensitivity stand./extended -18 / -24 dBmReceiver overload +0 dBmPower consumption ≤ 25 W


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Aggregator MD-D3ESTransmits 2 client signals in DWDM channel OTU1 with Super-FEC

• Transmits 2x(GE or STM-1/4) or STM-16 • OTN OTU1 line interface • Line interface redundancy • Useful for organizing 1+1 and ring protection • Super-FEC G.975 I.3 or FEC G.709 error correction algorithm • Two aggregators in one unit

Aggregator MD-D3ES transmits 1 client channel STM-16, or combines 2 client channels GE, STM-1/4 in a line channel OTN OTU1. The aggregator performs 3R-regeneration of the signal, and error correction according to G.709 or G.975 I.3 (Super-FEC). Two aggregators are combined in a single card.

SFP module is used as a line interface of the aggregator. DWDM SFP can be used for data transmission in DWDM network.

.

Parameter ValueLine bit rate 155 Mbit/s - 2.67 Gbit/s OTU1Quantity client interfaces 4Client interfaces’ standards GE, STM-1/4/16Operational wavelength range of a transmitter 1528.7-1567.1 nmPower consumption ≤30 W


2,5G equipment

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Оборудование DWDMOptical fiber amplifiers

EDFA and RAMAN optical fiber amplifiersThe optical amplifiers family includes preamplifiers, boosters and linear erbium doped amplifiers (EA), and also Raman amplifiers (RA) with power up to 2 W

• 1 and 2 cascaded amplifiers • Controls transient processes when adding channels • Low noise figure • Flat amplifying grid in C-band • Raman amplifiers with pump power up to 2 W (33 dBm) • Stabilization modes for an output power and amplification factor

Amplifiers increase the power of optical signals without an optical-to-electrical transduction. Amplifiers with one, two or three amplification stages are available. In multi-stage amplifiers, inter-stage access if provided

for connection of dispersion compensators. The use of gain flattening filters (GFFs) guarantees a flat gain grid in С-band. Each amplifier has a built-in tunable attenuator that enables smooth gain adjustment.

K1

ФП1

GFF

1%

VOA

ФП2

1%

EDF

K2

ФП3

GFF

1%

ФП4

1% 1%

In Out

MONOut2 In2

In Out

DCU

. . . . . .

DWDM DWDM

EDFA

EDF

ДН1 ДН2 ДН3

EDF

Parameter RAMAN EDFA

Spectral range 1528.7–1567.1 nmOutput power +30 dBm (RAMAN) +10 ... + 26 dBmNumber of amplifying stages - 1-2Number of leveling GFF filters - 1-2Spectral flatness per 10 dB of amplification - ≤0,5 dBPower adjustment range with an attenuator 10 - 20 11-18; 14--24; 25-36


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Оборудование DWDM Optical fiber amplifiers

Hybrid amplifier EDFA + RAMANCombination of Raman and erbium-doped fiber amplifier in one case

• EDFA + RAMAN in one case • High spectral flatness • Low noise figure

Hybrid amplifier is a combination of Raman amplifier and erbium-doped fiber amplifier (EDFA). Raman pumping with the power of up to 600 mW amplifies the emission in the line before its input to EDFA and decrease an effective noise factor of the amplifier. Due to lower noise factor it is possible to achieve larger distances between amplifiers and decrease network operating costs. Inter-stage access for connection of dispersion compensators can be optionally provided.

EDFA

λ2

MUX

WDMSignal

Counterpumping

Signal

Гибридный усилитель

OutIn

Pump1 Pump2

λ1

DWDMDWDM

Remote optically pumped amplifier ROPAIncrease of spans between two network nodes due to remote amplification of signal

The use of ROPAs makes it possible to increase the distance between two network nodes. The ROPA is an erbium-doped fiber amplifier that is pumped remotely using wavelength 1480 nm either in working fiber or in an additional fiber. The device consists of two functional units: a passive unit (hermetically sealed box with a fiber-optic circuit) and an active unit (one or

two pumping lasers). Two types of ROPA configuration are used: with a backward pumping (i.e. the pumping is provided from the receiver side) and with a forward pumping (i.e. the pumping is provided from the transmitter side). Working modes of amplifiers and the gain in distance can vary in different configurations, and depend on the required link capacity.

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Оборудование DWDMОборудование DWDMDWDM equipment

Optical units VmuxVariable optical multiplexer and demultiplexer

• Managed multiplexer / demultiplexer • Step size 0.1 dB attenuator • Controls transient processes when adding channels • Low noise figure • Flat amplifying grid in C-band

Units are designed to combine separate DWDM channels in one multi-channel line DWDM signal (multiplexer) or to extract separate DWDM channels from a multi-channel line DWDM signal (demultiplexer).

Optical power in each channel can be adjusted using built-in optical attenuator. Attenuation value for each channel can be managed using a network management system (NMS). Units support up to 40 or 48 channels.

Optical spectrum analyzer OPMMeasurements of the spectra in DWDM systems

The unit performs spectrum measurement for signal rates 2.5 Gbit/s (direct and external modulation), 10G, 40G and 100G (with limitations). Channel optical power can be measured in the range -40…-10 dBm. Noise floor is -55 dBm. The unit is managed using a web interface that displays the spectrum of multi-channel optical signal and a list of channel powers for different formats of modulation. The unit is designed for use in the “Volga” chassis.

• C-band 1528 — 1558 nm • Frequency grid 50 GHz • 4-lines optical switch

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Оборудование DWDMОборудование DWDM DWDM equipment

ROADM parameter 1/1 CA 2/1 4/1 9/1Span between channels 50GhzNumber of input / output channels 96/96 96 x 2/96 96 x 4/96 96 x 9/96Frequency band 192.10... 196.00 Thz 191.30... 196.05 ThzChannel loss (“Line in / Line out”) 6.5 dB 6.5 dB 7.5 dBChannel loss (“add”) 6.5 dB 6.5 dB 7.5 dBChannel loss (“drop”) ---Channel loss (“blocked”) 40 dBTuning range of attenuator 15 dBTuning step of attenuator 0.1 dBTime of channel switch 250 millisecondTime of attenuator switch ≤ 50 millisecondPower consumption ≤10W

ROADM – the solution for multichannel networksVersatile add/drop of lightpath channels for the network upgrade and protection

Reconfigurable multiplexers ROADM-x/1 (x=2, 4,9) are intended for flexible routing and cross-connect of optical channels on core network nodes. Multiplexers ROADM-1T/40C enables you to extract several optical channels from input DWDM signal, and to add client channels into output DWDM signal. Multiplexers ROADM-x/1 (x=2,4,9) enables you to extract arbitrary channels from 2, 4, or 9 input DWDM signals and combine them into one output DWDM signal. An optical equalizer has one

DWDM input port and one DWDM output port. An output signal power in each multiplexer can be tuned channel-by-channel in the Network Management System (NMS) using internal attenuators. All ROADM units support the WSS redundancy that allows you to reconfigure the path of optical channel when receiving the control signal. This technology allows you to provide redundancy for high bit-rate channels 100G and 40G at a minimal cost. The reconfiguration of the route takes less than 40 sec.


Functional diagram

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Compact system

Parameter ValueLine interface, line bit rate / payload OTU4, 120 Gbit/s / 103 Gbit/sOutput power with an optical amplifier -5 ... 0 dBmOperational wavelength range of the transmitter 1528.7–1567.1 nmReceiver sensitivity (BER=10-12) -18 dBmReceiver overload (BER=10-12) 0 dBmOSNRT (0.1 nm, BER=10-12) 12.5 dBPower consumption ≤235 W

System V1-MS-100E-T10 aggregates 10 client interfaces 10 Gbit/s and transmits them into a single 100G DWDM channel. The traffic protocol on 10G client ports can be changed without interruption of the line traffic. Muxponder performs 3R-regeneration of the signal, converts data to OTN OTU4 format and implements Soft-FEC error correction. A stabilized wavelength is used for data transmission in accordance with standard DWDM grid. The laser can be tuned across the C-band to cover any of up to 96 channels (with 50 GHz spacing). The system has an Ethernet port that enables to arrange service channel on a working wavelength. The device consists of: channel-forming DWDM unit, control unit, two power supply units, and fans unit.

Compact 100G DWDM system V1-MS-100ETransmission of 10 client signals 10 Gbit/s each in a DWDM channel 100 Gbit/s with Soft-FEC

• Transmission of 10 client signals 10GE, STM-64, OTU2, 8/10 GFC • Line interface OTU4, 120 Gbit/s • Error correction Soft-FEC • Coherent modulation format DP-QPSK • Automatic dispersion compensation up to 70 000 ps/nm • OSNRR = 12.5 dB (0.1 nm, BER=10-12)

Several world records were set:- 100G transmission over 4000 km without dispersion compensators or regeneration- 10*100G transmission over 500 km with ROPA

Rx

Tx

Client In 1

Client Out 1

10GE, STM-64, OTU2

DFB

Rx

Tx

Client In 2

Client Out 2

10GE, STM-64, OTU2 SFP+

DFB

Rx

Tx

Client In 10

Client Out 10

10GE, STM-64, OTU2 SFP+

DFB

DWDM

Tx

Line In

Line Out

OTU4OTN

FEC

SFP+

. . .

. . .

Coherent

Rx


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Compact system for transmission of 10 Gbit/s signals with Super-FEC. The system supports any 10 Gbit/s data formats on client interfaces: 10 GE, STM-64 etc. Each client channel is converted in OTN OTU2 format and sent to the selected line port. All channels on the line side can be combined by an external multiplexer for transmission in a single fiber using CWDM or DWDM technology.

Tunable SFP+ or “color” SFP/SFP+ with a fixed wavelength can be used on each line port. The use of standard SFP+ connectors significantly increases the cost-efficiency of the solution. High port density enables effective usage of the rack space. The device can be configures in 5-channel mode with a line redundancy 1+1. In this case each client channel is sent to two line ports: main and backup. These two line channels bearing the same client channel can be transmitted on different fibers or with OTN X-connect between the channels. The transponder supports Super-FEC error

correction that guarantees a high quality of 10G signal. Equipment is fully compatible with OTN networks. OTN provides powerful capabilities for channel management, signal monitoring, and traffic statistic analysis.

Compact DWDM system 10*10 Gbit/s V1-TT-C10E Transmission of 10 client signals 10 Gbit/s with Super-FEC and OTN X-Connect

• Transmission of 10 client signals 10GE, SDH STM-64, 8/10 GFC • Line interface OTU2 • Up to ten transponders, up to 10G each • Super-FEC G.975 I.7 error correction algorithm • Lines and clients interfaces SFP+ • ESC control channel at a separate wavelength • Compact standalone unit 1U, 19”

Rx

TxSFP+

Rx

TxSFP+

Rx

TxSFP+

Rx

TxSFP+DFB

Line In 1

Line Out 1

OTU2

TT-10EDWDM

Rx

TxSFP+DFB

Line In 2

Line Out 2

OTU2

Rx

TxSFP+DFB

Line In 10

Line Out 10

OTU2

Client Out 1

Client In 1


Client Out 2

Client In 2


Client Out 10

Client In 10


OTNSuperFEC

X-Connect

. . .

. . .

. . .

. . .

Десна 2

λ1

λ2

λ10


Parameter ValueLine interface, line bit rate OTU2, 10 Gbit/sOutput power with an optical amplifier -1 ... +3 dBm *Quantity SFP/SFP+ 10Operational wavelength range of the transmitter 1528.7–1567.1 nmReceiver sensitivity (BER=10-12) -24 dBm *Receiver overload (BER=10-12) -7 dBm *Power consumption ≤85 W

full support

Compact system

*Depending on the type of SFP+

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Система управленияCompact system

Compact DWDM/CWDM system 8 channels 10 Gbit/s each Transmission of 8 client signals 10 Gbit/s each without FEC

• Transmission of 10 client signals 10GE, STM-64, OTU2, 4/8/10 GFC • Up to eight transponders, up to 10G • Integrated optical multiplexer and amplifier • SFP + line interfaces with the possibility of a step-by-step expansion

Universal 8-channel transponder without FEC enables you to build flexible and cost-effective CWDM/DWDM systems. 8 pairs of ports (SFP slots) are located in a 1U chassis. Transponder supports up to 8 client channels SDH STM 16/64, Ethernet 1/10 GE, Fibre Channel 1/2/4/8/10, OTN OTU 1/2. 3R-regeneration of the signal is performed for each channel (reamplification, reshaping, retiming). All channels on the line side can be combined by a multiplexer for transmission in a single fiber using CWDM or DWDM technology.

Tunable SFP+ or “color” SFP/SFP+ with a fixed wavelength can be used on each line port. The use of standard SFP+ connectors significantly increases the cost-efficiency of the solution. A wide range of client interfaces with speeds from 155 Mbit/s to 10.7 Gbit/s enables smooth upgrade of client equipment without a need to change the transponder. The device supports

both STM and 1GE/10GE ports that makes it possible to arrange SDH-rings and IP-networks simultaneously based on a single WDM system.

Rx

TxSFP+

Rx

TxSFP+

Rx

TxSFP+

Rx

TxSFP+DFB

Line In 1

Line Out 1

TO-10P-P

DWDM

Rx

TxSFP+DFB

Line In 2

Line Out 2

Rx

TxSFP+DFB

Line In 8

Line Out 8

Client Out 1

Client In 1

STM-1/4/16/64, FCGE/10GE, OTU1/2 3R

. . .

. . .

Терек 2

3R

3R

. . .

Client Out 2

Client In 2

STM-1/4/16/64, FCGE/10GE, OTU1/2

Client Out 8

Client In 8

STM-1/4/16/64, FCGE/10GE, OTU1/2

λ1

λ2

λ8


Parameter ValueLine interface, line bit rate 1-10 Gbit/sOutput power with an optical amplifier -1 ... +3 dBm *

Operational wavelength range of the transmitter 1528.7–1567.1 nm (DWDM) *1270-1410 (CWDM) *

Receiver sensitivity (BER=10-12) -10 dBm *Receiver overload (BER=10-12) +8 dBm *Power consumption ≤50 W

* Depending on the type of SFP/SFP+

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Compact System ‘Volga Metro’ is solution for regional and metro networks using DWDM or CWDM technologies. Main load is 10x10Gbit/s also you can use 100G or 400G. The system provides the ability operator to organize the traffic at distances up to 230 km with 16 channels up to 10 Gbit/s each. The maximum capacity of the system - 100 Gbit/s. Equipment ‘Volga’ fully supports OTN technology.

The chassis has two types of a redundant power supply: DC 36-72 V or AC 220 V. The chassis has height of 3U and depth of 300 mm for installation in a standard rack 19/21''. The System is controlled by a built-in element management system EMS. The control unit allows you to organize the service channels at the operating wavelength.

Optical Unit provides multiplexing multiplexes the 16 channels in a optical fiber and their demultiplexing in a return channel; and (optionally) its amplification and dispersion compensation.

Transponder TT-C10E supports 10x Client signals in such formats as Ethernet, SDH,and Fiber Channel with flows up to 10 Gbit/s. Due to Forward error correction function Super-FEC the System provides a high-quality signal over long distances. Transponder Slot TT-S10E fully supports the OTN Cross-Connect Matrix up to 40 Gbit/s. Tunable SFP+ or ‘color’ SFP+ with a fixed wavelength can be used on each line port.

Expansion Slot can remain free and be used to increase the System capacity. For example in the Expansion Slot can be set the Transponder Unit MS100G, TQ-3ES or Aggregator Unit MD-D3ES to organize backup or expansion the System up to 16 channels. Configuration options:

• Transponder TQ-3ES transmit the client flow GE, SDH STM-1/4/16 in linear flow OTN OTU1. The transponder executes 3R regeneration of a 10 Gbit/s client optical signal and transforms a wavelength into an optical DWDM channel.

• Aggregator MD-D3ES transmits 1 client channel STM-16, or combines 2 client channels GE, STM-1/4 in a line channel OTN OTU1. The aggregator performs 3R-regeneration of the signal, and error correction according to G.709 or G.975 I.3 (Super-FEC).

Система управления Compact system

3U Compact Metro DWDM system 16 channels universal compact solution ‘Volga Metro’

Compact solution «Volga-Metro» with three slots:�Expansion Slot �Optical Slot �Transponder Slot

full support

��

• Muxponder MS-100E combines 10x10 Gbit/s client channels and transmits them in a DWDM channel. The muxponder executes 3R regeneration, converts data into the OTN OTU4 format and uses the powerful Soft-FEC error correction algorithm.

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Network management system

Network management system NMS “Fractal” Network management system (NMS) “Fractal” is designed for management and monitoring of digital transport systems DWDM, CWDM, OTN. NMS “Fractal” is compatible with the full range of “T8” transport equipment (DWDM system “Volga”, CWDM system “Irtysh”) as well as with the equipment of other vendors.

NMS “Fractal” provides network configuration management, troubleshooting control and management, quality management and security management. Thus the level of DWDM equipment management is combined with some elements of the level of digital transport systems management. Flexible configuration of filters enables operator to analyze system performance at a glance and identify pre-emergency situations at early stages. A system log for the whole network can be generated at any time.

NMS supports the following main functions:

Configuration management

• Setting parameters of network elements; • Synchronization of the NMS database and a

network element databas; • Synchronization of databases for all types and

versions of the network elements; • Collection of identification data about network

elements; • Input of passive network elements that

have no electronic elements of identification (microcontroller units);

• Graphical representation of sections (bayface layout), installed cards and devices and their technical condition, as well as color indication of alarm statuses of network elements;

• Input and storage of information about connections and tunnels (services) of a physical layer (optical cables and fibers), optical layer of OTN (optical channels, multiplexer sections etc.), electrical layer of OTN (OTU1-4, ODU0-4);

• Creation, management and monitoring of connections and tunnels of all layers of OTN;

• Graphical representation and display of technical condition and alarm statuses of connections and tunnels of all layers of OTN.

Troubleshooting control and management

• Representation of information about faults and changes of condition of controlled network elements in a real time (less than 1 min);

• Maintenance of a detailed system trouble logs; • Filtration and correlation of alarm signals; • Management of modes of performance monitoring

and handling of alarm and other messages from network elements, units and input/output ports (including “masking” of alarm messages);

• Change of category of alarm signals; • Support of sensors of control and management of

external alarm signaling; • Switching on/off audio alarm and adjustment

of sound volume for incoming alarm signals at operator station.

Quality management

• Activation/deactivation of quality parameters measurement for network elements and sections;

• Maintenance of a detailed system log of quality parameters on VC, MS, RS, and OTU (FEC) levels with an option to print all available information or to save it on an external storage.

Security management

• Identification and authentication of the user; • Setting access rights • Logging and passive auditing; • Control of integrity and security of the stored and

transmitted data.

NMS “Fractal” has “client-server” architecture. The NMS server requires Windows Server and Microsoft SQL Server, and the NMS client requires Windows and Internet Explorer.

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Network management system

Integrated element manager (EMS). Operation of a “Volga” chassis

Network inventoryConfiguration of channels

Principal scheme of the network is displayed

Indication of components operation Window of the network node faults

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DWDM lines with long spansOptical amplifiers allow increasing the span length due to increasing the signal power during transmission and the sensitivity during receiving.

Basic configurations

The most cost-efficient solutions used erbium doped fiber amplifiers (EDFA). The simultaneous use of a power amplifier and a preamplifier allows transmission of 16 optical channels for a distance up to 220 km and 40 channel for a distance up to 200 km.

Raman amplifying

Using of Raman amplifier units in addition to EDFA transmission and receiving amplifiers allows to organize transmission of optical channels for a span length up to 250–350 km in systems with up to 16 optical channels. It is possible to transmit 40 channels with the 250 km span.

ROPA

Extra-long sections of DWDM line. The ROPA technology (remote optical pumped amplifier) is used for remote pumping of the erbium doped fiber (EDF). Amplifier is pumped in a separate fiber. In the laboratory of T8 demonstrated a dense wavelength division multiplexing (DWDM) system, transmitting 10 x 100 Gbit/s per channel over 500 km without the use of regenerators or erbium doped fiber amplifiers. It is an industry World record for single-span line.

Development and design

EDFA2

MU

X

Transponders 10 x 100GA remote pumping amplifier

(ROPA1)

1480 nm

Removing the pump

EDF1

1480 nm

A remote pumping amplifier(ROPA2)

Removing the pump

EDFA1

1450 нмCounter Raman pumping

1480 nm1390 nm1480 nm

500 km

EDF2Span1 Span2 Span3WDM WDM WDM WDM WDM

WDM

1320

DCF

TXTXTXTXTXTXTXTX


TXTX

29ch30ch

RXRXRXRXRXRXRXRX


RXRX

29ch30ch

Transponders 10 x 100G

DEM

UX

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Multispan DWDM linesCoherent systems on the basis of TS-100E and MS-100E-T10 transponders

Due to DP-QPSK modulation format and soft algorithm for forward error correction with 15% redundancy we have reached an extremely low required optical to signal noise ratio (OSNR required) for 100G transponders – 11 dB.

Dispersion compensation free coherent DWDM systems of new generation

The use of coherent transponders makes it possible to build DWDM lines without passive dispersion compensators. Mathematical dispersion compensation takes place in the receiver’s DSP (digital signal processor).

100G transponders in traditional DWDM line with passive dispersion compensators

In existed DWDM lines there are passive dispersion compensators, which were placed at intermediate amplification nodes. The most economical way of the bandwidth Increasing of such a lines is step-by-step substitution of “old” low speed channels on “new” higher speed channels. In this case for the long time period it is possible coexistence of channels of different speeds and different modulation formats like 10G NRZ, 40G DPSK, 100G DP-QPSK. In these configurations there is a necessary to use periodical passive dispersion compensation. T8 engineers investigated functionality of the 100G transponders in DWDM line with periodical dispersion compensation. The OSNR margin in 1600 km DWDM line is equal to 7.5 dB.

100 kmEDFA 100

De�nition– Coherent 100G transponders TS-100E and MS-100E-T10

EDFA

DEMUX RX

100RX

100

MUX

TX

100 TX

100

N

100 km NEDFA

Definitions10G transponders TD-10 and MS-10FX

EDFA

DCU

10

MUX

TX

10

40 TX

100 TX

–

–

40G transponders TS-40E and MS-40E-Q1040– Coherent 100G transponders TS-100E and MS-100E-T10100– Dispersion compensatorDCU

10TX

40TX

100TX

DEMUX

Development and design

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DWDM network design Engineering department of the company performs calculation of DWDM networks of any complexity in short terms. Our engineers calculate more than 200 projects every year, and dozens of them reach the practical implementation stage.

We have a profound experience in designing telecommunication systems based on new formats of modulation of the optical signal (DP-QPSK 100 Gbit/s). Only in 2014 year we have built more than 10 000 km of 100G DWDM networks. We developed methods of optimization that make it possible to achieve optimal performance for combined networks where both coherent channels 100 Gbit/s and noncoherent channels 10 Gbit/s are transmitted simultaneously. Due to this our customers successfully put in operation 100G channels on an old infrastructure that was intended for 10G channels.

Based on initial data provided by customer (scheme of the network and distances between nodes, type and quantity of fibers on each span, plans of the network development) the engineering department solves the

following tasks:

• Development of a channelizing scheme and a principal scheme of the network

• Calculation of estimated quality of transmission in designed communication channels, and network reliability analysis;

• Optimization of networks to decrease capital and operating expenses;

• Analysis of errors and faults in existing networks.

We use self-engineered specialized software for most effective design of DWDM networks. For calculation of networks of high complexity a working group is usually created with experts of R&D department of the company. R&D department performs theoretical analysis and numerical simulation of DWDM networks of complex topology, simulation of new components (optical amplifiers, transponders and other devices), simulation and analysis of linear and nonlinear effects using the OptSim™ software and other tools.

Measurements of optical transmission systemsThe best laboratory in the industry, over 300 devices and many years of field measurements

The company owns a wide range of equipment for research and scientific experimentation:

• Field measurements of fiber-optic communication line parameters: chromatic dispersion, PMD, BOTDR, reflectometry

• Starting-up and adjustment of equipment at facilities: BER tests, jitters, spectral measurements of WDM

• Bench measurements: full-scale testing of DWDM systems before shipping, analysis of non-linear effects and noises

In the laboratory company has collected all the necessary devices for the construction and commissioning of coherent optical networks:

• SDH and Ethernet analyzers, Ethernet

1/10/100Gbit/s testing modules, channel testers (for measuring of channel’s power and wavelength)

• Optical Grid analyzers from EXFO and Anritsu • Oscillographs and optical sources, microscopes,

OTDRs, attenuators and power meters.

Разработка и проектированиеРазработка и проектированиеDevelopment and design

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Разработка и проектирование

Technical support We provide full technical support of DWDM and CWDM telecommunication equipment. Services are available 24/7 for all customers with a service contract in force. The scope of technical support depends on a program that was chosen by customer. Response time to customer inquiries starts from 15 min depending on the terms of the contract.

We have a large equipment replacement fund and are ready to deliver and replace the necessary equipment promptly for our customers at the entire territory of Russia.

Our Service Desk departments are located in Moscow and Saint Petersburg. Customer inquiries are handled using an automated inquiry management system (IMS). Our customers are provided with access to an information portal of the Service Desk.

Technical support includes the following services

• Remote fault diagnostics (using phone, e-mail, or remote access provided by customer);

• On-site fault diagnostics; • Installation and connection of replacement

equipment, recovery of configurations; • Preventive upgrade of the software; • Provision of access to an information portal of the

Service Desk; • Preventive audit of the network; • Repair of the failed equipment; • Preparation of recommendations and guidelines

for installation and commissioning of equipment

DWDM training center T8 holds seminars and trainings which consist of a theoretical part, read by leading specialists and a practical part with instruments and DWDM systems

We organize course «The DWDM systems operation». The main purpose of course is expanding theoretic knowledge of the DWDM technology, and acquiring practical experience in managing and configuring real WDM. The considerable part of course’s time is dedicated to practical questions of construction and operation of DWDM

networks. Students without assistance but under the leadership of the qualified experts carry out measurements and control of the network equipment at working stands. NMS Fractal is used for configuration of DWDM systems. The course is carried out to laboratories of the company and take 3 days. You can study the detailed program on a company site.

T8 Company has published a book called DWDM systems to improve the quality of training of young specialists. The book includes a series of lectures on FOCL that have been read by industry professionals for several years, they are engaged in the development, implementation and operation of DWDM systems. The book’s authors are T8' employees who develop and produce the DWDM equipment as well as design, install and adjust of DWDM-systems.

The recent book “DWDM systems” is available for ordering on the T8 web site.

VN Listvin D.Sc. conducts theoretical sessions at the seminar

Разработка и проектирование Development and design

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Оптическое КТВ

Dunay distributed fiber-optic security system Distributed sensor of vibrational and acoustical actions based on the coherent reflectometer for security systems

The system of «Dunay» - a distributed acoustic sensor influences for security systems. The system allows to fix the approaching to the guard zone and the border crossing throughout the whole perimeter (up to 40 km or to 75 km with ROPA). At approaching of person the car or while earthwork near protected object, the Dunay system is transmitting an alarm event to the operator’s computer indicating the source place with an accuracy of 10 meters. The system aenables detection and localization of a set of simultaneous influences too. This 3U device unit has three slots for: receiving and transmitting unit, amplifier module and embedded server for processing. The system has redundant power supplies. The sensitive element is an optical fiber. Customer can use fibers of the optical cable has already constructed in ground. System allow locate any activities causing ground and water vibration beyond 150 meters from fiber optic cabel.

The system received a patent № 2503879 on the monitoring device object in the pipeline. Dunay allows you to monitor the passage of defectoscope and cleaning pigs in pipes.

Advantages

• Low solution cost – only one central unit can control the 40 km line with option extension up to 75 km length;

• Immunity to electromagnetic influences; • Standard single mode optical fiber as sensitive

element (only one fiber is needed); • Independence on whether conditions: snowing,

raining, fog, wind, etc.; • Integration with other security systems on the

basis of Ethernet protocol: video surveillance, alarming of operative personal, etc.;

• No any field maintenance, easy in deployment (there is no need in hi qualification personal);

• Very robust system (redundant power supplies, hot swappable cards);

• Network management system complies to telecom standards, diary for recording main parameters, optical managing channel.

Applications

Guard and monitoring of oil and gas pipelinesThe Dunay system informs about approaching to zone under protection and permits operatively react, faster than a tap can be embed into the pipeline:

• The control of the tap embedding • The control of any unauthorized earthwork nearby

pipeline • Location registration defectoscopes and cleaning

pigs

Protection for communication lineOne of the most frequent reasons of FOCL failure is breaking of an optical cable. Damages might happen while earthwork in close vicinity of optical cable arrangement or because of vandalism. The Dunay system allows to prevent failure having reported to the operator about unauthorized earthwork near the communication line.

Perimeter GuardIn case of men’s or the car approaching to zone under control or earthwork execution in the vicinity of the zone, the Dunay system generates alarm and gives event details .

Vibration monitoring of bridges, buildings, extreme industrial plants and constructions To avoid emergency at critical facilities (bridges, dams, etc.) it is necessary continuously monitor the facility. In autonomy mode the system allows to control the events and inform about load tolerance level exceeding in time.

Fiber-optic security system

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Оптическое КТВ Fiber-optic security system

Possible sources of acoustic action

Max distance to OC

Moving person 10 m

Moving car 15 m

Moving truck 25 m

Moving heavy crawler machinery 150 m

Any kinds of surface and underground construction and earth works 150 m

Window waterfall. Local impact on the cable is red

Event is displayed on the map and logs

Operation & Maintenance

Short optical impulses (200 ns) inputs periodically (with 1-2 kHz frequency) into the standard single mode fiber (SSF), then changes in the interference figure of the backscattering signal are analyzed.

Standard telecom fiber is used as a distributed sensor. Short optical impulses (200 ns) are sent in the fiber periodically with a frequency of 1-2 kHz and changes in interference pattern of backscattered signal are analyzed. The system registers acoustical influences with frequencies from 4 Hz to 1 kHz. A network of “Dunay” reflectometers with a centralized management can be arranged for monitoring of extended objects like transfer pipelines. Reflectometers in the network are managed using a service channel.

The system contains built-in server that performs data processing: primary processing and filtration, detection and classification of events. A workstation of operator performs only tasks that do not require high computing performance, such as visualization of data acquired from one or several reflectometers, and representation of events on a network scheme or on the map.

This enables you to organize various network configurations using remote access depending on customer requirements. An API is provided for integration of the “Dunay” with existing security systems.

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Feedback from our customers

FGBU Center MIR IT is thankful to OOO “T8” which successfully performed installation and maintenance of equipment in 2010-2014 years… The communication network connected objects of XXII Winter Olympics Games Sochi-2014. “T8” carried out the calculation of the network, supply of equipment, commissioning and acceptance tests. All works were performed with high quality, in full scope and in the required terms.

Kornilov S.I.Interim General Director FGBU Center MIR IT

The T8 LLC team during the period from 2005 to 2012 at the territory of the North-Western Branch had realized tens of projects on the basis of DWDM equipment PUSK. As a result of this work, the DWDM network with the ring reservation covering 21 thousand kilometers length successfully operates on this territory. During the implementation period the T8 team demonstrated unique capability to solve not only engineering, but also scientific tasks.

O.A. SemanovNorth-Western Branch of OJSC Rostelecom, CTO

The Samara branch of OJSC Rostelecom expresses gratitude to specialists of T8 LLC for the work done in 2010-2012 on installation and bringing into service the transport network of telematic services constructed on the basis of the DWDM equipment PUSK. The project provided further successful development of the Internet in the Samara region.

P.E. Mogilevsky Samara Branch of OJSC Rostelecom, CTO


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The equipment based on fiber optic DWDM communication system “Volga” is used on the network of ZAO “Communications for Innovations” (Inoventica Group) and have demonstrated high reliability and excellent performance in accordance with current requirements to communication networks.

A.V. Ilyin Technical Director, ZAO “Communications for Innovations”

In November 2013 the “T8” company had completed the modernization of data communication systems of AO “KazTransOil”, Astana, Kazakhstan. The project was based on Russian fiber optic DWDM communication system “Volga”. A point-to-point solution between the headquarters of AO “KazTransOil” and its subsidiary was built to provide a transmission of mixed multiprotocol traffic with high bitrates (4G Fiber Channel, 10G Gigabit Ethernet), with upgrade capability up to 100G per channel.

Kaipov A.A. Director AO “KazTransOil”

The presence of highly skilled personnel, the use of modern and qualitative telecommunication and measuring equipment, the conscientious attitude to work, the attention to a customer at all stages of implementation of the project, the ability quickly and the competently of making decisions characterize the T8 LLC team as professionals.

V.V. Tysyiachny TechnoServ AC, CEO


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T8 Company

44, bld.1, Krasnobogatyrskaya street., Moscow, 107076Тел.: +7 (495) 380-01-39 Тел.: +7 (495) 380-01-99

d.51 letter J., ul. Magnitogorskaya, St. Petersburg, 195027Тел.: +7 (812) 677-36-11 Тел.: +7 (812) 677-36-12

[email protected]

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