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

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

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

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  1. SIP Trunk – Northwest Branch TrainingApril 2013Todd KawamuraCenturyLink 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

  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

  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

  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

  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)

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

  8. SIP Trunk – Northwest Branch Training • Determine how many sessions by type (Flat or Usage) • Flat Inbound Call Types (from PSTN) : Local TN, DID • 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)

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