Implementing SIP Trunking: Keys to Ensuring Interoperability

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These are the slides used during the webinar hosted by Enterprise Connect. Steve Carter and Sorell Slaymaker were the speakers.

The event was sponsored by XO Communications.

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Implementing SIP Trunking: Keys to Ensuring Interoperability

  1. 1. Presenters: Sorell Slaymaker, VP-IT Communications Architecture, Unified IT Systems LLC Steve Carter,Senior Product Manager, Enterprise SIP, XO Communications Sponsored by
  2. 2. What is your companys current SIP adoption status? Sponsored by
  3. 3. Why are you using or considering implementing SIP Trunking? Sponsored by
  4. 4. SIP Trunk Implementation Key Steps to Ensuring Interoperability May 25th, 2011www.xo.com © Copyright 2011. XO Communications, LLC. All rights reserved. XO, the XO design logo, and all related marks are registered trademarks of XO Communications, LLC. 5
  5. 5. Sorell Slaymaker Communications Architecture, Unified IT Systems LLC SIP TRUNKING BEST PRACTICESwww.xo.com © Copyright 2011. XO Communications, LLC. All rights reserved. XO, the XO design logo, and all related marks are registered trademarks of XO Communications, LLC. 6
  6. 6. SIP Trunking – Business Drivers1. Lowering Telecom costs by 30-70%!2. Improving stability – Moving all technology into centralized data centers3. Affordable agility – Following the IT software as a service model4. Quick transfers or conference calls – Getting rid of *8 tones5. Business Continuity – Ability to close an office due to weather, flu outbreak, … and still be able to handle calls all calls normally6. 24/7/365 – Answering all customer calls at any time7. 100% call recording for industry compliance, quality monitoring, and speech analytics, and real time reporting on what people are asking8. Improving productivity and the speed at which business operates by further integrating communication with people, processes, & informationwww.xo.com © Copyright 2011. XO Communications, LLC. All rights reserved. XO, the XO design logo, and all related marks are registered trademarks of XO Communications, LLC. 7
  7. 7. SIP Trunking - Best Practices1. Understand Current Environment – Business telephony feature requirements, call flow documentation, additional UC functionality2. Develop an ROI – Aggregate & consolidate voice trunks, clean-up environment, get competitive rates through an RFP process3. Create a Design – Centralized/Cloud model that is highly available across multiple data centers, decide if voice compression is required on SIP trunks4. Select Partners – SIP Trunking provider(s), SBC vendor, Integrator5. Think Big but Start Small – Test, pilot, and start with outbound LD, then inbound LD, then toll free, then DID/DOD local trunkswww.xo.com © Copyright 2011. XO Communications, LLC. All rights reserved. XO, the XO design logo, and all related marks are registered trademarks of XO Communications, LLC. 8
  8. 8. SIP Trunking - Best Practices (cont’d)6. SBC is Critical – Security, interoperability, support, and reporting7. Checklist – When testing SIP trunks from carrier(s) make sure all feature/functionality is there for all call flows.8. Training – Engineers and operations staff9. Troubleshooting – Must be able to identify and solve quality and other problems along with root cause – Guilty until proven innocent model10. Video – SIP trunking is for voice today, but also for video in the futurewww.xo.com © Copyright 2011. XO Communications, LLC. All rights reserved. XO, the XO design logo, and all related marks are registered trademarks of XO Communications, LLC. 9
  9. 9. SIP Trunking - Centralized Deployment Model Data Center #1 Office #1 PHONE/EXIT PAGE PAGE OPTIONS LEFT RIGHT SPEAKER HOLD HEADSET TRANSFER ABC D EF MUTE CONFERENCE 1 2 3 GH I JK L MNO 4 5 6 DROP P QRS TUV W XYZ REDIAL 7 8 9 * 0 # PHONE/EXIT PAGE PAGE OPTIONS LEFT RIGHT SPEAKER HOLD HEADSET TRANSFER ABC D EF MUTE CONFERENCE 1 2 3 GH I JK L MNO 4 5 6 DROP Access P QRS TUV W XYZ REDIAL 7 8 9 * 0 # RTR SBC RTR RTR 1 2 3 4 5 6 7 8 S8730 PCI POWER POWER RISER SUPPLY SUPPLY PP M CAGE PHONE/EXIT PAGE PAGE OPTIONS DIMMS DIMMS LEFT RIGHT PROC PROC SPEAKER HOLD INTER FANS LOCK OVER HEADSET TRANSFER TEMP I-PPM ABC D EF MUTE CONFERENCE UID 1 2 1 2 3 COMPACT GH I JK L MNO R O M 4 5 6 DROP P QRS TUV W XYZ REDIAL 7 8 9 1 2 3 4 5 6 7 8 POWER SUPPLY POWER SUPPLY PCI RISER S8730 * 0 # PP M CAGE LECs Service DIMMS DIMMS PROC PROC INTER FANS LOCK OVER TEMP I-PPM UID 1 2 COMPACT R O M Call Control Provider Gateway SIP Trunks MPLS Cellular RTR SBC Data Center #2 Office #N Gateway eNum PHONE/EXIT PAGE PAGE OPTIONS LEFT RIGHT SPEAKER HOLD HEADSET TRANSFER ABC D EF MUTE CONFERENCE 1 2 3 GH I JK L MNO Internet 4 5 6 DROP P QRS TUV W XYZ REDIAL 7 8 9 * 0 # Gateway RTR PHONE/EXIT PAGE PAGE OPTIONS IXCs LEFT RIGHT SPEAKER HOLD Access HEADSET TRANSFER ABC D EF MUTE CONFERENCE 1 2 3 GH I JK L MNO 4 5 6 DROP P QRS TUV W XYZ REDIAL 7 8 9 * 0 # RTR SBC RTR 1 2 3 4 5 6 7 8 PHONE/EXIT PAGE PAGE OPTIONS LEFT RIGHT S8730 PCI SPEAKER HOLD POWER POWER RISER SUPPLY SUPPLY PP M CAGE DIMMS DIMMS HEADSET TRANSFER PROC PROC ABC D EF MUTE CONFERENCE INTER LOCK 1 2 3 FANS OVER GH I JK L MNO TEMP I-PPM 4 5 6 DROP P QRS TUV W XYZ REDIAL UID 1 2 7 8 9 COMPACT R O M * 0 # 1 2 3 4 5 6 7 8 S8730 PCI POWER POWER RISER SUPPLY SUPPLY PP M CAGE DIMMS DIMMS PROC PROC INTER FANS LOCK OVER TEMP I-PPM UID 1 2 COMPACT R O M Call Control  All voice is VoIP, Session Border Controllers (SBCs) are used for voice application security, support, and reporting  The office has very little technology, all communication services reside in the “cloud”, a private cloud is within a companies data centerswww.xo.com © Copyright 2011. XO Communications, LLC. All rights reserved. XO, the XO design logo, and all related marks are registered trademarks of XO Communications, LLC. 10
  10. 10. Steve Carter Senior Product Manager, Enterprise SIP, XO Communications INTEROPERABILITY AND IMPLEMENTATIONwww.xo.com © Copyright 2011. XO Communications, LLC. All rights reserved. XO, the XO design logo, and all related marks are registered trademarks of XO Communications, LLC. 11
  11. 11. 8 Steps to Ensure a Smooth Implementation1. Know your objectives and the key indicators that will tell you that you’ve met them2. Ask telling questions of the service providers, CPE providers and key implementers3. Coordinate closely with all parties4. Know the challenges for your specific application, expect issues and be prepared to address them5. Have a good test plan6. Get good documentation – configuration guides are key7. Take advantage of management tools and solutions from service providers – Managed SBC’s – Reporting Tools – Security Tools8. Allow the Time You Needwww.xo.com © Copyright 2011. XO Communications, LLC. All rights reserved. XO, the XO design logo, and all related marks are registered trademarks of XO Communications, LLC. 12
  12. 12. Top Concerns to Address for Call Handling Ensure that Local, LD, Operator, E911, Directory, Toll Free inbound and Outbound call types are supported – Does the provider deliver proper E911 info to PSAP or require additional trunking – Rate local calls properly that traverse the PSTN or bill LD rates Purchased sessions need to carry local and LD Make sure carrier provides required transcoding in its network to support your required codecs and RFC 2833 for DTMF Relay Data should be allowed to share the ESIP access or provide separate access. Many Providers STILL charge additional fees for Data/Internetwww.xo.com © Copyright 2011. XO Communications, LLC. All rights reserved. XO, the XO design logo, and all related marks are registered trademarks of XO Communications, LLC. 13
  13. 13. Don’t Expect Your SIP Provider to Configure YourSBC/IP-PBX  Knowledge from the vendor is key to ensure your equipment is configured properly  Allow for a proper interop testing process  Coordinate with your hardware vendor and service provider  Get configuration guides from your service providerwww.xo.com © Copyright 2011. XO Communications, LLC. All rights reserved. XO, the XO design logo, and all related marks are registered trademarks of XO Communications, LLC. 14
  14. 14. Anticipate Problems and Test  Every Implementation is unique no matter what providers tell you – Differences in SIP headers – Differences in error codes – DTMF Requirements  Incompatibilities with older hardware models  Software versions make a difference  Fax works differently for every service provider and hardware vendor  Consider an SBC to handle different devices in your networkwww.xo.com © Copyright 2011. XO Communications, LLC. All rights reserved. XO, the XO design logo, and all related marks are registered trademarks of XO Communications, LLC. 15
  15. 15. Have a Test Plan  You NEED due diligence on YOUR test lab setup  Expect that you will need Increased time for interop testing  Review and agree on the test plan with the carrier (and vendor)www.xo.com © Copyright 2011. XO Communications, LLC. All rights reserved. XO, the XO design logo, and all related marks are registered trademarks of XO Communications, LLC. 16
  16. 16. Configuration Guides What They Tell You and How They Can Help Sample Issues/Fixes “*67 for Outgoing Calling Line ID Delivery Blocking per Call is not supported. See Configuration Guide for workaround.” “Did not test Fax” “When incoming PSTN calls are delivered to desk phone with Call Forwarding enabled to an off-net PSTN phone, the calls will fail unless one of the workarounds outlined in the Configuration Guide is implemented.” “Music on Hold Server codec must be set for G.729 as shown in the Configuration Guide.” “Hardware may be necessary to support transcoding, conferencing and call volume requirements.”www.xo.com © Copyright 2011. XO Communications, LLC. All rights reserved. XO, the XO design logo, and all related marks are registered trademarks of XO Communications, LLC. 17
  17. 17. Effective Use of Tools Help Manage the SIP Solution Enhanced Reporting Capabilities Exist for Enterprise SIP and MPLS IP-VPN Services – XO Communications provides live intelligence about the performance of the customer’s XO provided MPLS IP-VPN network as well as applications that run over the network, including VoIP, with XO Applications Performance Management Highlighted Features – MOS scoring – Network Performance Analysis – SLAs monitoring, including Delay – Bandwidth use – Class of Service monitoring – Applications and VoIP Performance Analysis – VoIP deployment assessmentwww.xo.com © Copyright 2011. XO Communications, LLC. All rights reserved. XO, the XO design logo, and all related marks are registered trademarks of XO Communications, LLC. 18
  18. 18. Encryption Solutions for Security Concerns Just as most enterprise organizations encrypt the data that transverses their network, they are requesting that VoIP providers encrypt voice and data packets transmitted over their VoIP networks A number of Encryption options Exist for SIP signaling – Encryption (TLS) – RTP encryption (sRTP) options – Enterprises can have options to choose either feature individually or bothwww.xo.com © Copyright 2011. XO Communications, LLC. All rights reserved. XO, the XO design logo, and all related marks are registered trademarks of XO Communications, LLC. 19
  19. 19. Consider Using a Session Border Controller (SBC) Some Service Providers offer a Managed Session Border Controller – Enables customers buying Enterprise SIP to have a “managed device” instead of procuring their own for the Enterprise SIP trunk connection(s)  Considerable CAPEX savings  Ease of Implementation  Knowledge Transfer  Management and Monitoring – The SBC provides the following benefits:  Security – protects the network and other devices  Connectivity – allows different parts of the network to communicate more effectively  Quality of service – the QoS policy of a network and prioritization of flows is usually implemented by the SBC  Statistics and Billing information – since all sessions that pass through the edge of the network pass through the SBC, it is a natural point to gather statistics and usage based information on these sessionswww.xo.com © Copyright 2011. XO Communications, LLC. All rights reserved. XO, the XO design logo, and all related marks are registered trademarks of XO Communications, LLC. 20
  20. 20. Consider Business Continuity Options  Connect your network to hand-off sites at edge of the Service Provider network in different POPs – Multiple hand-off sites should be distributed on different SBCs – Failover: Service provider should provision network sessions capacity to support failover of traffic between designated sites • The network should automatically route inbound traffic normally delivered to the first site to the second site • Outbound calls from customer should accepted on any of the SIP Trunks  Beyond your premise, the Enterprise SIP architecture of the carrier should have redundancy in the network – Enterprise SIP failovers from a given region or from a given city should be “homed” on geographically diverse SBCswww.xo.com © Copyright 2011. XO Communications, LLC. All rights reserved. XO, the XO design logo, and all related marks are registered trademarks of XO Communications, LLC. 21
  21. 21. Best Case Scenario for The Service Provider and Hardware Vendoris the BEST CASE for YOU!  Understand Your Requirements – Business telephony feature requirements, call flow documentation, additional UC functionality  Have a Plan – Test, pilot, and start with outbound LD, then inbound LD, then toll free, then DID/DOD local trunks  Select Partners That Work Together – SIP Trunking provider(s), IP- PBX Vendor, SBC vendor, Integrator  Have a Checklist – When testing SIP trunks from carrier(s) make sure all feature/functionality is there for all call flows  Expect Challenges – Must be able to identify and solve quality and other problems along with root causewww.xo.com © Copyright 2011. XO Communications, LLC. All rights reserved. XO, the XO design logo, and all related marks are registered trademarks of XO Communications, LLC. 22
  22. 22. SIP Resources Links• Video - Implementing SIP Trunking: Learn the Steps to a Smooth Enterprise SIP Trunk Implementation• White Paper - E911 VoIP Essentials for Enterprise Deployments – A Guide for Distributed VoIP Environments http://www.xo.com/SiteCollectionDocuments/Whitepapers/E911_VoIP_Essentials_WP.pdf• White Paper - SIP for the Enterprise: Key Advantages & Benefits http://www.xo.com/SiteCollectionDocuments/Whitepapers/SIP_for_the_Enterprise_Whitepaper.pdf• Video - XO Enterprise SIP Trunking- How Distributed Enterprises Can Control Costs http://youtu.be/niYj9EaALIM• Enterprise SIP Savings Estimator http://www.xo.com/forms/campaign/ExternalSales/EntSIP/Estimator.aspx• XO Enterprise SIP Service Overview http://www.xo.com/SiteCollectionDocuments/DataSheets/Enterprise_SIP_DS.pdf• IP PBXs XO Lab-Certified for Interoperability with XO SIP http://www.xo.com/services/voip/sip/Pages/PBX.aspxwww.xo.com © Copyright 2011. XO Communications, LLC. All rights reserved. XO, the XO design logo, and all related marks are registered trademarks of XO Communications, LLC. 23

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