february 2012 - rocky mountain avaya user's group preso02... · fundamentals of sip avaya sip...
TRANSCRIPT
![Page 1: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/1.jpg)
February 2012
![Page 2: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/2.jpg)
Michael Mauck
National Account Manager
![Page 3: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/3.jpg)
Introductions Fundamentals of SIP Avaya SIP Technology Real Life Experiences System/Session Manager Demo Roadmap – why SIP
![Page 4: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/4.jpg)
Rob Nixon
VP of Operations
![Page 5: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/5.jpg)
What is SIP?
SIP Components
![Page 6: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/6.jpg)
IETF Standard
Application Layer protocol
Based on HTTP and SMTP
Methods-based Protocol
![Page 7: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/7.jpg)
RFC 3261 describes Session Initiation Protocol (SIP), an application-layer control (signaling) protocol for creating, modifying, and terminating sessions with one or more participants. These sessions include Internet telephone calls, multimedia distribution, and multimedia conferences.
![Page 8: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/8.jpg)
Layer Name TCP/IP Protocols
7 Application NNTP, SIP, SSI, DNS, FTP, Gopher, HTTP, NFS,
NTP, DHCP, SMPP, SMTP, SNMP, Telnet, RIP, BGP
6 Presentation MIME, SSL, TLS, XDR
5 Session Sockets. Session establishment in TCP, RTP
4 Transport TCP, UDP, SCTP, DCCP
3 Network IP, IPsec, ICMP, IGMP, OSPF
2 Data Link PPP, SBTV SLIP, PPTP
1 Physical X.25 (X.21bis, EIA/TIA-232, EIA/TIA-449, EIA-530, G.703)
![Page 9: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/9.jpg)
SIP is designed similar to the HTTP request/response transaction model
A transaction consists of a client request that invokes a particular method or function on the server and at least one response
SIP reuses most of the header fields, encoding rules and status codes of HTTP, providing a readable text-based format
![Page 10: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/10.jpg)
A signaling standard that can connect and control communications sessions between applications
Independent of media type or the function performed by the end applications
SIP is known as a “methods-based” signaling protocol because it provides the methods to connect, signal, and control sessions ◦ In that sense, SIP is quite different from a “functionally
based” signaling protocol, such as Q.SIG, which is used not only to establish sessions, but also to define the specific features those sessions can support.
![Page 11: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/11.jpg)
User Agents
Registrars & Location Services
Proxy Servers
B2BUA
Redirect Servers
Presence
SDP
![Page 12: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/12.jpg)
User Agent Clients and User Agent Servers are logical entities and both reside in a UA device, allowing peer-to-peer sessions using a client-server protocol.
◦ (UAC) send SIP requests and receive responses to requests
◦ (UAS) receive SIP requests and send responses to requests
![Page 13: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/13.jpg)
Servers that maintain a repository of the current network locations of users within a domain
Registrars rely on Location Services ◦ A database mapping of a user’s SIP URI (Universal
Resource Identifier) with one or more contact addresses or numbers for the user.
![Page 14: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/14.jpg)
IP Address: 192.168.1.156 sip:[email protected] sip:[email protected];user=phone sip:[email protected]
Registration
Bkarch has registered. Now I know that sip:[email protected]
is contactable at sip:[email protected] and
sip:[email protected];user=phone
Registry
SIP Server
![Page 15: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/15.jpg)
The SIP standard defines SIP proxies as “elements that route SIP requests to User Agent Servers (UAS) and SIP responses to User Agent Clients (UAC)
A request may traverse several proxies on its way to a UAS.
![Page 16: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/16.jpg)
I want to call Adam Smith at Comcast.
DNS
I don’t know have [email protected]
registered, let me check DNS
Sunturn
Comcast
Registry
Registry
SIP Server
SIP Server
![Page 17: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/17.jpg)
A B2BUA is a logical entity that receives a request and processes it as a UAS. It then acts as a UAC and generates requests. Unlike a Proxy Server, it maintains dialog state and must participate in all requests sent on the dialogs it establishes.
The B2BUA is similar in many ways to a Proxy server, but has tighter control over the dialog and does not have the limitations of the SIP standard on the Proxy (for example, a Proxy cannot disconnect a call or alter the messages).
![Page 18: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/18.jpg)
A redirect server receives SIP requests and responds with 3xx (redirection) responses, directing the client to contact an alternate set of SIP addresses.
![Page 19: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/19.jpg)
I want to call Adam Smith at Verizon
NA
Sunturn
Verizon NA
Verizon APAC
Adam Smith is working a
special project in
APAC
DNS
DNS
Registry
SIP Server
SIP Server
SIP Server
![Page 20: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/20.jpg)
Presence gathers information from multiple providers and then shares it between those providers and any other applications that are interested in it.
RFC 3265 – (SIP)-Specific Event Notification
![Page 21: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/21.jpg)
Registry
SUBSCRIBE to sip:[email protected]
Brian is not available. I will remember to update this
subscriber when his presence status changes.
200 OK
200 OK
NOTIFY sip:[email protected] Not Available
200 OK
NOTIFY sip:[email protected] Available
Brian is available.
![Page 22: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/22.jpg)
SDP is the protocol used to describe multimedia session announcement, multimedia session invitation and other forms of multimedia session initiation. SDP packets usually include the following information: ◦ Session information - Name and Purpose, Timer,
Bandwidth and Contact Info
◦ Media information - Type, Transport Protocol Media Format, Multicast Information
![Page 23: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/23.jpg)
Brian Karch
Sales Engineer
![Page 24: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/24.jpg)
System Manager
Session Manager
Common Applications
![Page 25: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/25.jpg)
System Manager Centralized Management
Centralized Alarming
Centralized Logging
Profile Management
Application Sequencing
Station Profile
Messaging Profile
![Page 26: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/26.jpg)
Session Manager ◦ SIP Routing Engine
◦ SIP Integration Platform
◦ Geographically Dispersed
Branch Session Manager ◦ Simultaneous Registration (Endpoint)
◦ Survives to CM LSP
![Page 27: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/27.jpg)
Common Applications ◦ Session Border Controller
◦ Video Integration
◦ 3rd Party Integration
◦ Endpoints
![Page 28: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/28.jpg)
![Page 29: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/29.jpg)
Why ? ◦ Scalable
◦ Resiliency (Active / Active)
◦ Consolidated Network Infrastructure
TDM vs Ethernet
◦ Solution Development and R&D
![Page 30: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/30.jpg)
Mike Baker
Software Engineering Manager
![Page 31: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/31.jpg)
SIP Trunks ◦ The Myth: “You already have our <insert vendor
here> data circuit; we can add SIP voice to that no problem. We work with Avaya all the time.”
◦ The Reality:
Requires Voice/Data/LAN-WAN/Security input
Requires clear network topology and access to elements
Requires supported App Note for any help from Avaya
Requires SBC for BEST PRACTICES
![Page 32: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/32.jpg)
SIP Trunks ◦ The Myth: “Our <insert vendor here> PBX can talk
SIP to yours no problem. We work with Avaya all the time.”
◦ The Reality:
Not all vendors comply with RFC 3261
Most require significant customization
Most require adaptations
Adaptations don’t cover all scenarios
![Page 33: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/33.jpg)
SIP Stations ◦ The Myth: “This cheap <insert vendor here> phone
uses SIP. They say they connect to Avaya all the time.”
◦ The Reality:
Some customization required on Avaya side
All non-Avaya devices require mostly manual and frequently tedious configuration on the device
Feature sets are still limited in varying degrees for ALL SIP phones
![Page 34: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/34.jpg)
Your friendly neighborhood “SIP MythBusters”
![Page 35: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/35.jpg)
Mike Baker
Software Engineering Manager
![Page 36: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/36.jpg)
Demo Environment ◦ S8300 CM R6 /G700 Evolution Server (PBX)
◦ S8800 System Manager R6
◦ S8800 Session Manager R6
◦ One-X SIP softphone
◦ ADVD SIP hardphone
◦ 9630 SIP hardphone
◦ Avaya/Nortel 4550 ethernet switch
![Page 37: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/37.jpg)
Rob Nixon
VP of Operations
![Page 38: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/38.jpg)
Standards based
Ubiquitous
IMS
![Page 39: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/39.jpg)
RFC Description
RFC 2976 The SIP INFO Method
RFC 3261 SIP: Session Initiation Protocol
RFC 3262 Reliability of Provisional Responses in the Session Initiation Protocol (SIP)
RFC 3263 Session Initiation Protocol (SIP): Locating SIP Servers
RFC 3264 An Offer/Answer Model with the Session Description Protocol (SDP)
RFC 3265 Session Initiation Protocol (SIP)-Specific Event Notification
RFC 3311 The Session Initiation Protocol (SIP) UPDATE Method
RFC 3325 Private Extensions to (SIP) for Asserted Identity within Trusted Networks
RFC 3428 Session Initiation Protocol (SIP) Extension for Instant Messaging
RFC 3515 The Session Initiation Protocol (SIP) Refer Method
![Page 40: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/40.jpg)
Dozens of manufacturers of endpoints—hard, soft, mobile
Accepted standard for flexible trunking
3GPP and IMS deliver IP Multimedia to users ◦ IMS defines a framework that enables the
convergence of voice, video, data and mobile network technology over an IP-based infrastructure
◦ Users register to IMS directly via SIP—mobile phones, PDAs, computers, wireless, etc.
![Page 41: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/41.jpg)
IMS is not intended to standardize applications but rather to aid the access of multimedia and voice applications from wireless and wireline terminals, i.e. create a form of fixed-mobile convergence (FMC)
IMS is intended to create a horizontal control layer that isolates the access network from the service layer
![Page 42: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/42.jpg)
Named Sequenced
• Caller must dial a special access number to trigger the feature
• Caller is oblivious—does not know if a feature will be triggered or not
• A Named Application is always the SIP End Point
• A Sequenced App is often a mid-way point
• Named apps are dependent upon NRP—Session Manager doesn’t know what will happen/where, it just knows that the digits dialed route to X
![Page 43: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/43.jpg)
Application sequencing is the routing engine for the SIP sessions, adding applications into the session before completing the setup of the session
Enables unified communications (UC) services to be applied to any user over any network on any device
Can be part of origination, termination, or both
![Page 44: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/44.jpg)
App Server
e.g. Call Filtering
![Page 45: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/45.jpg)
App Server
e.g. Personal Assistant
![Page 46: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/46.jpg)
App Server
e.g. Call Recording
App Server
e.g. Call Billing
![Page 47: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/47.jpg)
SIP provides economies
SIP creates opportunities for best in class
SIP puts communications availability into an end user’s hands
SIP will continue to become a ubiquitous methodology for setting up multimedia sessions in, and between, the wireless, service provider, and Enterprise market space
![Page 48: February 2012 - Rocky Mountain Avaya User's Group Preso02... · Fundamentals of SIP Avaya SIP Technology ... Most require adaptations Adaptations don’t cover all scenarios](https://reader031.vdocuments.mx/reader031/viewer/2022022519/5b16f96e7f8b9a0b548b8840/html5/thumbnails/48.jpg)
Pam Drennan
Director of Sales