Board of Directors Meeting February 16, 2005

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Bob Blair-SmithCbeyond
IIT VoIP Roundtable 4 June 18, 2008
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Agenda

• What is SIP Trunking?
• What are the implications of SIP trunking to the
  Enterprise?
• Why SIPconnect?
• BeyondVoiceTM with SIPconnect 3 years and
  counting
• What is next for SIP
• The SIP Forum and other Resources
• Q A

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What is SIP trunking ?
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Categorizing SIP For starters

• Internet Protocol
• The language of the Internet
• Networks all over the world are engineered to
  speak IP
• Voice over Internet Protocol
• VoIP is voice communications traveling on an
  IP-based network
• There are many VoIP languages
• Session Initiation Protocol
• It was originally designed as a way of streaming
  audio and video over the internet
• S.I.P.s dynamic, presence-based foundation
  unlocks the full potential of multi-point,
  personalized communications
• Has matured as the preferred standard for VoIP
  because it meets the needs of demanding
  enterprises
• SIPconnect
• SIP Forums recommendation for standardized
  interconnection between the ITSP and the IP PBX
• Addresses Security, quality and flexibility

VoIP
SIP
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SIP Overview

• SESSION INITIATION PROTOCOL
• A Signaling protocol that is used to establish a
  "communications session"
• Established as an Internet Engineering Task Force
  (IETF) multimedia communications standard
• Performs basic call-control tasks call set-up
  and tear-down
• Provides signaling via RTP for features such as
  call hold, caller ID, conferencing and call
  transferring
• Allows for feature negotiation all of the
  participants in a session can agree on the
  features to be supported among them
• Mechanism for call management - for example
  adding, dropping, or transferring participants

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What is SIP Trunking

• First, what is a trunk?
• Switch-to-switch connections (i.e. PBX to CO)a
  dedicated line or circuits from a service
  provider
• Examples T1, ISDN PRI
• A SIP Trunk is
• A network interface device (IP PBX) that
  recognizes SIP signals and can process these
  signals to other SIP devices.
• Provided by a Softswitch or SBC-Session Border
  Controller which provides
• Signal processing
• Protocol conversion
• Transcoding conversion (Voice Compression)
• Call routing
• AAA-Authorization, Authentication and Accounting
  functions
• Switching control interface to and from gateways

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Business Telephony Trunking

• Voice Trunking in Classic telephony
• Static scaling and channel provisioning
• Internal calls stay on a Local network
• Connect multiple stations to the minimum
• active paths needed
• FOR THE OLDIES FANS
• Classic Infrastructure supported (Cat 3,
  dual-run)
• Connects to any traditional telephony provider
• Costs incurred on station moves, adds, changes
• Limited/no adaptability to UC or Mobility

PSTN
Local Access
PBX
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Trunking and SIP trunking

• Voice Trunking in SIP telephony
• Dynamic scaling on a single physical interface
• Internal calls stay on the LAN
• Layer 2 QoS required for optimum quality
• Connect multiple stations to the minimum
• active paths needed (same)
• PLUS
• Many Advantages of VoIP
• Worldwide interoperability in a standard language
• Plug-n-play devices
• Single cable runs possible with QoS on Network
• Dynamic and static IP Addressing
• Wide array of software integration

PSTN
Service Provider

Local Access
Router/IAD
100/1000 Mbps QoS Enabled Switch
IP PBX
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Business and Industry Trends

• Why this trend?
• Becoming Software Applications
• Very Competitive Prices
• Low Cost to Support
• Direct-Inward-Dial s
• Feature Richness
• Multi-location Support
• Geographic Independence
• Soft-phone Support
• Desktop/Application Integration

US PBX Revenue Spending

• Classic PBX adoption is decreasing
• IP-PBX deployments exceeded TDM in 05
• InfoTech predicts that IP-PBX line shipments will
  make up over 90 of premises gear shipments by
  the year 2010.

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What are the implications of SIP Trunking to the
Enterprise?
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Implications for Business LAN design

• LAN Infrastructure
• Cat 5/5e or later Cabling plant necessary
• Ethernet Switches must be used for VoIP
  deployment
• Ethernet HUBs should not be used in Enterprise
  VoIP deployments
• In LANs that have High Data traffic, traffic
  management should be considered such as VLANs and
  Layer 3 QoS.
• SIP and RTP through NAT
• SIP traffic must traverse NAT to the PBX without
  compromising security or voice quality
• NAT commonly used at customer premise (or hosted
  via an outbound proxy / SBC)
• RTP can be blocked by passive deployment of a
  customer router/firewall
• Blocked SIP media stream and signaling ports (UDP
  5060, Media UDP 10,000 through 20,000)
• Symptoms include erroneous Bye disconnects,
  One-way audio call paths
• More info Enroll in Cbeyonds Free monthly
  training anywhere in our 11 U.S. markets

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SIP Call Ladder Example SAS timeout could
occur

• RTP blocked as OK or BYE message is sent from
  SIP Server

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Why SIPconnect?
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Messy IP PBX-to-PSTN links

• Connecting IP PBXs to PSTN is unnecessarily
  costly
• Calling VoIP-to-TDM requires costly gateway
  hardware
• Conversions add latency to VoIP calls
• Erodes inherent value of leveraging low-cost VoIP
  termination providers
• End-to-End signaling benefits lost
• Useful signaling information is lost at gateway

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Connecting via native IP is better

• Enterprises can connect directly to VoIP service
  providers
• Eliminates the cost of enterprise gateways and
  TDM routing
• VoIP service providers provide reduced calling
  costs to global PSTN
• Voice traffic can also increasingly remain IP
  between end points
• Opens up a broad array of PBX or ITSP- supported
  personalization and SIP features

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SIP a foundation for the solution

• SIP only defines base primitives
• Additional interconnection definitions needed
• Inter-domain authentication / registration policy
• Addressing in the presence of multiple firewalls
• In both signaling and bearer path
• OAM around hierarchical logical identities
• Users, customers, locations, DID blocks,
• A higher-level specification was needed
• Some accepted method using SIP to buildIP PBX ltgt
  service provider SIP trunks
• Needed to address specific requirements that SIP
  alone does not address

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SIPconnectThe Rest of the Solution

• Lists required IETF and ITU-T standards
• e.g. RFC 2246, RFC 2933, E.164, G.711, RFC 2833
• Selects one method where standards allow more
• e.g. Enterprise phones do not Register with
  Service Provider - only with PBX,
• Allows CPE OEMs to bundle or unbundle SIPconnect
  Compliant elements
• Specifies minimal capabilities that must be
  supported by each element (SP enterprise)
• e.g. DNS SRV, G711-u to G711-a translation,
  canonical hostnames, E.164 lt-gt enterprise mapping
  tables, fixed and variable-length numbering
  plans,
• Specifies a reference architecture (next slide)

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SIPconnect Reference Architecture

• Quality of Service drives the recommendation
• ITSPs may provision fully-managed services to a
  SIP gateway /proxy server
• PBX manufacturers can bundle or provide compliant
  CPE a la carte
• Trunking efficiency without using bandwidth for
  internal traffic or back-hauling signaling
  (e.g., hosted IP telephony)

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Why SIPconnect Summation

• Rich Feature Support with Trunking Efficiency
• Helps service providers deliver enhanced,
  personalized services to IP-PBXs
• DIDs, Personal Call scheduling, Click-to-Dial,
  Simultaneous ring, selective call handling, etc.
• Features less likely to tie up additional trunks
  and therefore bandwidth
• Defines specific recommendations for
• QoS configuration
• Echo cancellation
• DTMF relay
• Packetization rates
• Codec support
• Fax and data traffic
• Flexibility among vendors
• No locked CPE-to-network provider dependencies
• Can use IP-PBX and VoIP phones with all compliant
  networks
• May connect compliant networks service to many IP
  PBX models

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SIPconnect Timeline

• A defined set of rules for interconnecting IP
  PBXs to Carriers using SIP Trunking
• February 2005 - Cbeyond co-authored SIPconnect
  with Cisco, TalkSwitch, Avaya, Mitel, and
  Broadsoft and launched BeyondVoiceTM with
  SIPconnect.
• July 2005 - New SIP Forum Working Group was
  formed - IP PBX and service provider
  interoperability task group
• January 23, 2008 - SIP Forum Board of Directors
  ratified version 1.0 of the SIPconnect Technical
  Recommendation (handout)
• Spring 2008 SIPconnect 1.1 is now in Working
  Draft

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A proven Interface option for Cbeyond Customers
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Sure sign of successRapid Industry Adoption
since 2005
Vodavi XceleratorTM
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BeyondVoice with SIPconnect

• Deployed since May 2008 at CPDs VoIP Lab
• Multiple SIPconnect-compliant PBXs onsite
• Upcoming Collaborations and projects
• Home-made IP-PBXs
• Mobility
• Firewalls
• Switches
• SBCs
• ?????

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Typical SIPconnect LAN configuration

• CPD VoIP Lab configuration

T1
To the Cbeyond Network for call processing and
PSTN Gateway Functions

• Cbeyond Owned
• Cisco 2430 Integrated Access Device
• Providing NAT, DHCP, and Managed
• Firewall Functionality.

Analog Dial Tone
Punch down Block
QoS Enabled Switch
Analog Phone
Fax
IP Phone
IP Phone
IP PBX
Computer
Computer
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Whats Next for SIPconnect?
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SIPconnect Compliant Certification Mark

• The SIPconnect Compliant mark is the
  official brand of the leading standard for SIP
  Trunking products and services.
• Who should get certified?
• Service providers, PBX developers or makers of
  SIPconnect compliant products or services
• VARs can help influence their products progress
  to interoperability - your role!
• Program launched in September 2007 and now has
  nine participants

covergence
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SIPconnect Compliant Certification Program

• The steps for Manufacturers to apply are as
  follows
•  
• 1. Complete and submit  the SIPconnect Compliant
  Application
• 2. Complete the SIPconnect Compliance Survey for
  each product you plan to list as SIPconnect
  Compliant
• 3. Sign and Submit the SIPconnect License
  Agreement
•  
• Certification Committee members will review
  applications and provide a response within two
  weeks of submission.
• Approved
• Approved Contingent Upon Confirmation of
  Eligibility
• Not Approved

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and other resources
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ResourcesSIPforum.org and IIT.edu
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Resource for VARs Free SIPconnect Training
Preparing for, Installing, and Configuring
BeyondVoice with Enroll Today
sales.engineers_at_cbeyond.net 2008 Calendar
2nd Wednesday of each month 900 AM 1230
PM
DATE TIME PLACE . Wednesday,
August 13th 900 am Noon Cbeyond in Oak
Brook, Illinois Wednesday, September 10th 900
am Noon Cbeyond in Oak Brook,
Illinois Wednesday, October 8th, 900 am Noon
Cbeyond in Oak Brook, Illinois Wednesday,
November 12th 900 am Noon Cbeyond in Oak
Brook, Illinois Wednesday, December 10th 900 am
Noon Cbeyond in Oak Brook, Illinois
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Resource for Resellers Cbeyond Partner Portal

• Partner Commissions
• Collateral
• Service area lookup tool
• Configuration Guides
• IP-PBX configuration guides Provided by the PBX
  manufacturers
• How to configure the PBX with Cbeyond specific
  registration info
• PBX Support Discussion Boards

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Resources http//www.cbeyond.net
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Questions and Answers