beyond pots replacement is sip trunking a step on that route? © 2009 intertex data ab 1 prepared...
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Beyond POTS Replacement Is SIP Trunking a step on that route?
© 2009 Intertex Data AB 1
Prepared for: INTERNET TELEPHONY ConferenceIngate’s SIP Trunking WorkshopLos Angeles, September 2009
By: Karl Erik Ståhl President & CEO Intertex Data ABChairman Ingate Systems ABkarl.stahl@intertex.se
SIP Trunking: Can it be More Than a New Connection?
PSTNIP CloudSIP Trunking
Provider
IP-PBXFirewall
Ingate SIParator®
TDM Trunk
GW
Data & VoIP LAN
SIP System
SIP Trunk
GW
and More Than About Interoperability
SIP Trunk
Ingate SIParator®
-or-Ingate Firewall
3ComAastraDigium/AsteriskAvayaCisco Call ManagerEricsson MX-OneFonalityInnovaphoneInteractive IntelligenceIwatsuMicrosoftMitelNEC / SphereNortelObjectworldPanasonicPingtelSamsungSERShoretelSiemensSIP-GearSwyxMore in pipeline....
360 NetworksAirespringAT&TBandTel Bandwidth.com BroadvoxCbeyond CellipCordia CorporationExcel SwitchingGammaGlobal Crossing IP-Only Juma NetworksLevel 3
NetlogicNexvortexNuvoxO1 PaetecPrimus RNK TelecomTDC Tele2TeliaToplinkVoEX VoIP UnlimitedVoxboneMore in pipeline.....
Carrier EquipmentAcme PacketBroadsoftNexPoint
SonusSylantroSER
Compliant with
Service providers IP-PBXs
See: www.siptrunk.org
© 2009 Intertex Data AB 5
Benefits of SIP Trunking
Monthly cost savings
Single network for all communications
Lower cost of Moves, Adds and Changes
Disaster Recovery / Business Continuity
User provisioning
Steps of going beyond POTS replication – Unified Communication
• Mobility – Remote workers• Multimedia - Video, IM, Presence, etc.• Real SIP address – like email address• WiFi mobile phone communication
Let’s talk about this now!
© 2009 Intertex Data AB 6
There is Potential to Go Beyond!
RJ45
LAN Intranet Internet
Now we have a new global network: The IP Networks
RJ11
POTS and PSTN have been there for 100 years
Black Phone
IP Phone
3.5 kHz isn’t HiFi, but MOS is 5!
Soft ClientWiFi Mobile
And we have a new standard: SIP
And there is more than Voice: Presence, IM, Video, etc.
© 2009 Intertex Data AB 7
Lots of Talk About Multimedia, Unified Communication etc.
“…jag känner ingen tvekan inför riktningen. Vi går från rösttelefoni till full multimedia.”
Visionen är att alla apparater så småningom kopplas ihop. Mobilen kommunicerar lika lätt med datorn som som med musikanläggningen.
Internet solutions…Multimedia…
Artikel hämtad från NyTekniks webbtjänst. Publicerad: 2006-11-22
Nu vill Svanberg in i vardagsrummen "Den nya teve-världen" var en av rubrikerna. "Det uppkopplade hemmet" var ett annat begrepp som upprepades flitigt under konferensen. - Vi ser en potential i hemmet, och vill bli en del av den miljön, sa Carl-Henric Svanberg i Tokyo.
Teve, dvd, spelkonsol och dator väntas snart kunna kommunicera i hemmanätet via standarder som tas fram av Dlna - Digital Living Network Alliance - där Sony, Nokia, Microsoft, Intel och flera andra hemelektronikjättar deltar. Samtidigt är IMS standarden som telekomleverantörer, som Ericsson, använder för tjänsterna i de nya telenäten.
© 2009 Intertex Data AB 8
In the enterprise and at home
InternetInternet
and Talk About Devices with SIP Capabilities
Soon hundreds of million of SIP multimedia terminals in our pockets!
© 2009 Intertex Data AB 9
Europe
US
VPNTunnel
IP PBX
PBX
But have We Seen Much More than POTSoIP?
PSTN
Gateway
Gateway
TollBypass
IP PBX
Gateway
SoftSwitch
Gateway
Voice overBroadband
Very seldom VoIP connectivity between the VoIP IP clouds!
Most broadband VoIP providers still run calls between each other over the PSTN!
Are we stuckwith old POTStelephony over new wires?
© 2009 Intertex Data AB 10
HTTP created the Web
SMTP created Email
SIP can create global Live IP Person-to-Person Communication!
And When Will We See the Next Step of Internet Usage?
© 2009 Intertex Data AB 11
There is a Severe Infrastructure Problem…
LAN
LAN
FW FW
FWFW
InternetInternet
email web
SIP does not traverse the common NATs and firewalls protecting the LANs .
IMS
(SIP based)
IMS
(SIP based)
What about SIP for Live Person-to-Person Communication?
A common Network and common Protocols changed our lives:
SMTP gave us global email!
HTTP gave us the Web!
NATs and Firewalls were designed to allow such protocols.
© 2009 Intertex Data AB 12
Why are NATs and Firewalls Such Obstacle
Typical Internet protocol (SMTP, HTTP…)
Internet
HOSTSERVER
SIP (and H.323…) connects Person-to-Person
Internet
PERSONPERSON
SIP is the Protocol for IP Communication Person-to-Person,
BUT IT DOES NOT REACH THE USER’s!
Locate the person Set up a session+ Open real time media streams+
Data & VoIP LAN
Soft Clients and Multimedia Terminals
PSTNPublic
Internet
SIP Trunking Provider GW
IP-PBX Firewall
SIP Trunking does not pass a SIP unaware NAT/firewall!
…and the firewall cannot be opened enough to make it work because of NAT.
SIP System
And that is a Main Problem when SIP Trunking IP-PBXs
© 2009 Intertex Data AB 14
And Hosted VoIP Suffers from the Same Problem
InternetInternet
The 5060 SIP-port is just grabbed on the outside to the FXS ports!
(And lower level SIP ALGs often cause problems and do not handle more than basic scenarios.)
Telephone ports (FXS) on the CPE is a popular way to deploy IP telephony. By logically placing the SIP clients on the outside of the NAT/Firewall, unreliable work-around methods like STUN, TURN and ICE become unnecessary. However, this only gives POTS replication, often even stopping general SIP based services!
FXS ports (for plugging in analog phones) IS POTS replication!
© 2009 Intertex Data AB 15
No battery draining of WiFi mobile phones, otherwise caused by keep-alive packets* inhibiting sleep mode.* Work-around methods for SIP NAT-traversal like STUN, TURN, ICE and Far End NAT Traversal use frequent keep-alive packets to keep holes in the NAT/Firewall open.
Let’s Use Real SIP Capable NAT/Router/Firewalls
InternetInternet
Problems solved where they occur
No special requirements on the SIP Client – Just standard SIP
Wired or wireless SIP clients (phones, soft clients, PDAs)
SIP
Intertex and Ingate CPEs have a SIP Proxy based Firewall/NAT
General, can handle complex call scenarios and all SIP services
Additional functionality available (PBX like functionality, ENUM, etc.)
IMSIMS
© 2009 Intertex Data AB 16
PSTNPublic
Internet
SIP Trunking Provider
GWSIP System
Data & VoIP LAN
IP-PBX
Demarcation point of service and bringing SIP communication to the LAN
Soft Clients and Multimedia Terminals
Intertex IX78
Remote Users
Let’s Fix the SIP Trunking and at the Same TimeEnable Going Beyond POTS Replication
© 2009 Intertex Data AB 17
And Step in to the World of Global Live IP Communication
Fix the NATs and firewalls and there is no reason to be caught in POTSoIPs islands! SIP connects globally and has
lots of applications. It’s not magic – It’s just the SIP standard!
VoIP++
Global IP Connectivity
All SIP Services
InternetUS, Los Angeles
INGATE LAN
ingate.com
THIS LAN, Internet Telephony Workshop
calle@intertex.se
von.sipnr.org
My broadband at home
sophie@ingate.com marta@intertex.se
cell
PSTN
INTERTEX LAN
intertex.se
Sweden
3G
stefan@ingate.com
Japan
kamilla@von.sipnr.org
PSTN
SIP/PSTNGateway
SIP Trunk Provider 1
PSTNSIP/PSTNGateway
SIP Trunk Provider 2
© 2009 Intertex Data AB 19
Beyond POTS: Mobility, Multimedia and Numbers
We certainly want our home workers connected to the company PBX
And the same goes for our road warriors - at the hotel- at public WiFi
All should have all PBX services- Reached by extension number or DID- Place PSTN calls (displaying correct CallerID)- Voice mail, conferencing etc.- Presence, IM, video if supported by the PBX
INTERTEX LAN
intertex.se
InternetUS, Los Angeles
INGATE LAN
ingate.com
THIS LAN, Internet Telephony Workshop
calle@intertex.se
von.sipnr.org
My broadband at home
PSTN
SIP/PSTNGateway
SIP Trunk Provider 1
PSTNSIP/PSTNGateway
SIP Trunk Provider 2
(sophie@ingate.com) marta@intertex.se
cell
PSTN
Sweden
3G
stefan@ingate.com
Japan
kamilla@von.sipnr.org
PBX Mobility with SIP Trunking (demo)PSTN +46 8 12345629 my direct numbermarta 29 = my extension numbercalle 28 (marta)PSTN +46 8 12345600 Intertex main ext 29, 25s leave Voice Mailcalle mobile in the hallVoice Mail comes via email
© 2009 Intertex Data AB 21
Beyond POTS: Mobility, Multimedia and Numbers
So is IM (Instant Messaging)
Laptops have cameras and good screens, so why not video?- Not user friendly at all. For internal use only.
And voice can actually be better than 3kHz AM-radio quality!- Who said MOS score 5 was perfect? Hardly HiFi?
Presence is really useful
INTERTEX LAN
intertex.se
InternetUS, Los Angeles
INGATE LAN
ingate.com
THIS LAN, Internet Telephony Workshop
calle@intertex.se
von.sipnr.org
My broadband at home
PSTN
SIP/PSTNGateway
SIP Trunk Provider 1
PSTNSIP/PSTNGateway
SIP Trunk Provider 2
sophie@ingate.com (marta@intertex.se)
cell
PSTN
Sweden
3G
stefan@ingate.com
Japan
kamilla@von.sipnr.org
…and other SIP based applications (demo)• Presence, Instant Messaging (is kamilla or other on-line?)Not restricted to own domain intertex.se, here also ingate.com and von.sipnr.orgcalle@intertex.se sophie@ingate.com (listen + video)• Wide band codec: “S” is not “F” anymore!• VideoMedia goes the shortest way (just to the local switch here)and we saw global SIP calls – not restricted to own domain
© 2009 Intertex Data AB 23
Beyond POTS: Mobility, Multimedia and Numbers
Telephone numbers WILL be around for long- We are simple too used to E.164 numbers and everyone has one- But they are really not particularly user friendly…- Would email have been a success if we had used our fax numbers?
Operators provide SIP names like u081234567@sip14.provider.se- Not user friendly at all. For internal use only.
We want a real SIP address: john.brown@smartco.com- Just like our email addresses
Let us have both: +46 8 1234567 = john.brown@smartco.com!- Service providers can do it- Here the Intertex and Ingate products do it!
INTERTEX LAN
intertex.se
InternetUS, Los Angeles
INGATE LAN
ingate.com
THIS LAN, Internet Telephony Workshop
calle@intertex.se
von.sipnr.org
My broadband at home
PSTN
SIP/PSTNGateway
SIP Trunk Provider 1
PSTNSIP/PSTNGateway
SIP Trunk Provider 2
sophie@ingate.com 0845004195@ipkund.rixtelecom.se
cell
PSTN
Sweden
3G
stefan@ingate.com
Japan
kamilla@von.sipnr.org
Telephone numbers and SIP addresses (demo)Can we do global SIP calls over the SIP trunk? It is up to the operators!E.g. Telia routes real SIP calls and don’t steal the media (even though they are on managed VoIP cloud)0845004195 calle using 08 12345629 (view sophie’s screen)(IP PSTN ------> PSTN IP only POTS voice)sophie calle using 08 12345629 (ENUM: IP IP quick, wide band codec, video)
© 2009 Intertex Data AB 25
IPIP
PSTN
ENUM – Using Phone Numbers but Staying on IP
IPIP
Not only for PSTN by-pass, but also for better voice and multimedia
Clients, Intertexes/Ingates, or service providers can use ENUM
+46 8 12345629 calle@intertex.se
2) ENUM lookup: Is there a SIP address for +46812345629?Ask DNS: 9.2.6.5.4.3.2.1.8.6.4.e164.arpaYeah try sip:calle@intertex.se
1) Dial Phone Number 08 12345629
3) Place the call directly to: sip:calle@intertex.se
© 2009 Intertex Data AB 26
STUN, TURN, ICE (client based) and FENT (typically done by SBCs) are alternative methods for working around non SIP capable NATs and Firewalls
Use them if required, e.g. for road warriors behind well behaved NATs with a not too tight firewalls
Ingate and Intertex can enable FENT to help SIP remote clients behind non SIP aware NATs and firewalls, e.g. Remote Users
But for SIP trunking and global and general SIP communication, you need something reliable and secure that also handles real complex call scenarios
What about STUN, TURN, ICE and Far End Nat Traversal (FENT)?
© 2009 Intertex Data AB 27
Workaround Methods have their Limitations…
IMSIMS
VoIPVoIP
IMSIMS
LAN
LAN
FW FW
FWFW
RELIABILITY: STUN, TURN, ICE and Far End NAT Traversal (FENT) rely on guesswork of NAT/Firewall behavior – Thus never fully reliable. Unsuccessful calls – especially in complex scenarios, one way media, timeout during calls etc. etc.. Internet Internet Keep-alive packets
inhibit sleep mode, thus draining batteries of WiFi devices.
STUN TURN
SECURITY POLICY: These workarounds require Firewalls to have large port ranges open from inside. FW is no longer in control of what is allowed into the LAN! STUN, TURN and ICE delegate control to the Client and can also be used for evil protocols. FENT delegates control to the Operator.
No control of QoS– where it is most important!
No control of QoS– where it is most important!
SECURITY AND STABILITY: STUN, TURN, ICE are Client based, FENT is operator based (part of SBC). Both rely on punching holes in the Firewall and keeping NAT bindings open.
ISSUES:And with general SIP on several
WAN-pipes: No chance!
© 2009 Intertex Data AB 28
SIP Capable Firewalls
Ingate Systems Inc.www.ingate.comInfo@ingate.com7 Farley Road HollisNH 03049United StatesPh: +1 (603) 883-6569Tel sv: +46 8 6007750
Intertex Data ABwww.intertex.seinfo@intertex.seRissneleden 45 SE-174 44 SundbybergSwedensip:reception@intertex.seTel: +46 8 6282828
See us at ITEXPO Room 502A!
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