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SIP Trunk – Northwest Branch Training April 2013 Todd Kawamura CenturyLink Sales Engineer.

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Presentation on theme: "SIP Trunk – Northwest Branch Training April 2013 Todd Kawamura CenturyLink Sales Engineer."— Presentation transcript:

1 SIP Trunk – Northwest Branch Training April 2013 Todd Kawamura CenturyLink Sales Engineer

2 SIP Trunk – Northwest Branch Training What we should all know about SIP Trunk What is SIP & brief history Primary advantages & benefits of SIP Sweet spot for SIP opportunities – What to look for Configuration Elements 2

3 SIP Trunk – Northwest Branch Training What we should all know about SIP Trunk What is SIP & Brief History SIP stands for “Session Initiation Protocol” It’s an IETF standard RFC3261 first published in 2002 Based on many of the features in HTTP and SMTP protocols SIP is the signaling protocol to setup and process VoIP calls RTP is SIP’s companion protocol that’s used to carry the audio 3

4 SIP Trunk – Northwest Branch Training What we should all know about SIP Trunk Primary Advantages & Benefits of SIP Fault-Tolerance: Ability to build in different levels of diversity Cost-Effectiveness: Barrier to entry is low, as is marginal expense Scalability: Easy to add more capacity with SIP Flexibility: Lots of options to adjust call bandwidth, call flow, etc. Manageability: QControl gives users lots of control over SIP service Centralizability: One vendor to deal with for PSTN Consolidation of PSTN access lines Centralized TN management 4

5 SIP Trunk – Northwest Branch Training What we should all know about SIP Trunk Sweet spot for SIP opportunities: Customer... Has QoS-enabled IP WAN now Already has a VoIP solution in place Has multiple remote/branch locations with traditional PSTN access Views telephony as business-critical to enterprise (e.g., call center) Has seasonal fluctuations or other unanticipated call-flow variations 5

6 SIP Trunk – Northwest Branch Training SIP Trunking Configuration Elements SIP engineering considerations Session sizing Bandwidth sizing Session-by-type sizing (Usage and Flat session quantity) SIP Diversity options (Enterprise, Switch) 6

7 SIP Trunk – Northwest Branch Training  Determine total session (i.e., trunking) requirements for enterprise  Methods include: o Peg counts from traffic study o CDR data from customer’s PBX o Rule of thumb method agreed to by customer

8 SIP Trunk – Northwest Branch Training Determine how many sessions by type (Flat or Usage) o Flat Inbound Call Types (from PSTN) : Local TN, DID o Flat Outbound Call Types (to PSTN): Local (including 411, 711, 911)  Usage Inbound Call Types (from PSTN): 8xx, RDID  Usage Outbound Call Types (to PSTN): LD, Alien TN (non-SIP TN)

9 SIP Trunk – Northwest Branch Training  For each access line, determine max sessions  Determine circuit type / L2 protocol (HDLC, PPP, Ethernet)  Determine VoIP packet sample size  Determine Qty of G.711 calls  Determine Qty of G.729 calls  Determine % of IQ circuit that is for P1 traffic  Determine % of P1 bandwidth that is VoIP (QVUR)

10 SIP Trunk – Northwest Branch Training What we should all know about SIP Trunk Diversity Options Simplified (I hope) 10

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