Fax over IP and SIP                                                                              Trunking© COPYRIGHT 2012 ...
Topics    SIP trunks    Overview of FoIP technology    Factors influencing FoIP success    Considerations before choosing ...
What is SIP Trunking    Alternative to business PSTN services             Analog FXO trunk replacements             T1/E1 ...
Legacy PBX with TDM (PRI) Trunk                                                                                    Enterpr...
Replace PRI on Legacy PBX with SIP Trunk                                                                                  ...
FoIP server connected to IP-PBX                                                                                           ...
SR140 Directly connected to a SIP Trunk                                                                                   ...
Overview of FoIP Technology8   © COPYRIGHT 2012 DIALOGIC, INC. ALL RIGHTS RESERVED.   |   www.dialogic.com
FoIP Techniques    G.711 (T.30 Fax Pass-Through)             ITU-T recommendation for Pulse Code Modulation (PCM) of      ...
Fax over IP and G.711 Fax     Digital fax data is converted to PCM audio stream and sent as Real-time     Transport Protoc...
Addressing the Challenges of G.711     Most gateways offer a G.711 Fax Pass-Through mode that can be     enabled (V,152) t...
T.38 Fax     Designed to address FoIP issues, including network impairments              Can tolerate Internet-level packe...
Factors Influencing FoIP Success13   © COPYRIGHT 2012 DIALOGIC, INC. ALL RIGHTS RESERVED.   |   www.dialogic.com
Factors Influencing Success – Impairment Levels     Network conditions based on ITU G.1050 definitions                    ...
Factors Influencing Success – Impairment Levels     Network conditions based on ITU G.1050 definitions                    ...
Sample Dialogic Lab Testing ResultsPacket Loss: T.38 vs. G.711 Pass-Through                                               ...
Sample Dialog Lab Testing ResultsBurst Loss: T.38 vs. G.711 Pass-Through                                                  ...
When to Consider G.711 Pass-Through     When the gateway or SIP trunk does not support T.38     AND, you have a well manag...
FoIP Research White Paper                                                                                   Considerations...
Considerations Before Choosing a SIP Trunk Provider20   © COPYRIGHT 2012 DIALOGIC, INC. ALL RIGHTS RESERVED.   |   www.dia...
Replace PRI on legacy PBX with SIP Trunk                                                                                  ...
FoIP server connected to IP-PBX                                                                                           ...
SR140 Directly connected to a SIP Trunk                                                                                   ...
SIP Trunks: Factors Influencing End-to-End Success     SIP trunk provider              T.38 support                 • In t...
SIP Trunks: Factors Influencing End-to-End Success     Careful selection of SIP trunk provider              Specifically o...
Interoperability     Dialogic maintains a list of equipment and SIP trunks that have     been successfully tested with Dia...
Dialogic, Veraz, Brooktrout among others as well as related logos, are either registered trademarks or trademarks of Dialo...
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Sip trunking slides_-_ot_partner_conference

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Using OpenText and RightFax SIP Trunking

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Sip trunking slides_-_ot_partner_conference

  1. 1. Fax over IP and SIP Trunking© COPYRIGHT 2012 DIALOGIC, INC. ALL RIGHTS RESERVED. | www.dialogic.com
  2. 2. Topics SIP trunks Overview of FoIP technology Factors influencing FoIP success Considerations before choosing a SIP trunk provider2 © COPYRIGHT 2012 DIALOGIC, INC. ALL RIGHTS RESERVED. | www.dialogic.com
  3. 3. What is SIP Trunking Alternative to business PSTN services Analog FXO trunk replacements T1/E1 PRI trunk replacements Generally lower cost as compared to traditional PSTN services Leverages broadband data connections Converged voice and data services Shared bandwidth Dynamically allocated3 © COPYRIGHT 2012 DIALOGIC, INC. ALL RIGHTS RESERVED. | www.dialogic.com
  4. 4. Legacy PBX with TDM (PRI) Trunk Enterprise Public Telephone TDM Network Legacy TDM PBX OpenText Fax ServersRecipient/ Senderconventionalfax machine Application Storage Servers4 © COPYRIGHT 2012 DIALOGIC, INC. ALL RIGHTS RESERVED. | www.dialogic.com
  5. 5. Replace PRI on Legacy PBX with SIP Trunk Enterprise IP Service Gateway Provider SIP TDM Public Telephone Legacy TDM Network PBX OpenText Fax ServersRecipient/ Senderconventionalfax machine Application Storage Servers5 © COPYRIGHT 2012 DIALOGIC, INC. ALL RIGHTS RESERVED. | www.dialogic.com
  6. 6. FoIP server connected to IP-PBX Enterprise IP Service Border Element Provider SIP Public IP-PBX OpenText Telephone Fax Servers NetworkRecipient/ Sender Application Storageconventional Serversfax machine6 © COPYRIGHT 2012 DIALOGIC, INC. ALL RIGHTS RESERVED. | www.dialogic.com
  7. 7. SR140 Directly connected to a SIP Trunk Enterprise IP Service Border Element Provider SIP Public OpenText Telephone Fax Servers NetworkRecipient/ Sender Application Storageconventional Serversfax machine7 © COPYRIGHT 2012 DIALOGIC, INC. ALL RIGHTS RESERVED. | www.dialogic.com
  8. 8. Overview of FoIP Technology8 © COPYRIGHT 2012 DIALOGIC, INC. ALL RIGHTS RESERVED. | www.dialogic.com
  9. 9. FoIP Techniques G.711 (T.30 Fax Pass-Through) ITU-T recommendation for Pulse Code Modulation (PCM) of voice frequencies Fax treated as a VoIP call; encode the fax audio for IP transport T.38 Fax Relay ITU-T recommendation for real-time fax communication over IP networks Encapsulate the T.30 fax using a data communications method9 © COPYRIGHT 2012 DIALOGIC, INC. ALL RIGHTS RESERVED. | www.dialogic.com
  10. 10. Fax over IP and G.711 Fax Digital fax data is converted to PCM audio stream and sent as Real-time Transport Protocol (RTP) packetsChallenges Some network impairments, such as packet loss and jitter, can impact fax much more than voice Techniques used by VoIP gateways to improve voice quality, such as packet loss concealment and dynamic jitter buffers, can adversely affect fax10 © COPYRIGHT 2012 DIALOGIC, INC. ALL RIGHTS RESERVED. | www.dialogic.com
  11. 11. Addressing the Challenges of G.711 Most gateways offer a G.711 Fax Pass-Through mode that can be enabled (V,152) to improve fax quality/success; this mode: Disables the voice enhancing techniques on fax calls Employs a large, static jitter buffer T.38 was introduced as a ITU-recommended procedure for transporting fax over IP networks11 © COPYRIGHT 2012 DIALOGIC, INC. ALL RIGHTS RESERVED. | www.dialogic.com
  12. 12. T.38 Fax Designed to address FoIP issues, including network impairments Can tolerate Internet-level packet loss, very high delays, and jitter Much lower bandwidth requirements than G.711 Optional redundancy mode Usually implemented and enabledChallenges Not all SIP trunk providers offer T.38, but the number is growing Not all SIP and T.38 implementations are alike; SIP Forum is working to address this12 © COPYRIGHT 2012 DIALOGIC, INC. ALL RIGHTS RESERVED. | www.dialogic.com
  13. 13. Factors Influencing FoIP Success13 © COPYRIGHT 2012 DIALOGIC, INC. ALL RIGHTS RESERVED. | www.dialogic.com
  14. 14. Factors Influencing Success – Impairment Levels Network conditions based on ITU G.1050 definitions Single Burst Network type Network Round Trip Latency* Packet Loss Packet Loss 40 to 200 ms (regional) Random loss Well Managed IP Network < 0.05% 180 to 600 ms (intercontinental) only 100 to 200 ms (regional) Partially Managed IP Network < 2% 40-200 ms 180 to 800 ms (intercontinental) Unmanaged IP Network 40-10,000 100 to 1000 ms < 20% (open Internet) ms *not including transcoding, jitter buffers, or response generation (supports real-time applications with strict constraints)14 © COPYRIGHT 2012 DIALOGIC, INC. ALL RIGHTS RESERVED. | www.dialogic.com
  15. 15. Factors Influencing Success – Impairment Levels Network conditions based on ITU G.1050 definitions Single Burst Network type Network Round Trip Latency* Packet Loss Packet Loss 40 to 200 ms (regional) Random loss Well Managed IP Network < 0.05% 180 to 600 ms (intercontinental) only 100 to 200 ms (regional) Partially Managed IP Network < 2% 40-200 ms 180 to 800 ms (intercontinental) Unmanaged IP Network 40-10,000 100 to 1000 ms < 20% (open Internet) ms *not including transcoding, jitter buffers, or response generation (supports real-time applications with strict constraints) Typical SIP Trunk15 © COPYRIGHT 2012 DIALOGIC, INC. ALL RIGHTS RESERVED. | www.dialogic.com
  16. 16. Sample Dialogic Lab Testing ResultsPacket Loss: T.38 vs. G.711 Pass-Through T.38 completion rates remained above 90% at 2% 2% packet loss 2% G.711 Pass-Through T.38 completion rates completion rates dropped drop below at 2% packet below 60% 40% at 2% packet lossloss16 © COPYRIGHT 2012 DIALOGIC, INC. ALL RIGHTS RESERVED. | www.dialogic.com
  17. 17. Sample Dialog Lab Testing ResultsBurst Loss: T.38 vs. G.711 Pass-Through T.38 completion rates remained above 90% at 25 ms burst packet loss G.711 Pass-Through completion rates drop at 25 ms burst packet loss17 © COPYRIGHT 2012 DIALOGIC, INC. ALL RIGHTS RESERVED. | www.dialogic.com
  18. 18. When to Consider G.711 Pass-Through When the gateway or SIP trunk does not support T.38 AND, you have a well managed network Considerations: Setting jitter buffers to a fixed size that is greater than the amount of jitter present on the network Optimizing the network to prioritize fax traffic to prevent packet loss Selecting network elements that are fax-aware18 © COPYRIGHT 2012 DIALOGIC, INC. ALL RIGHTS RESERVED. | www.dialogic.com
  19. 19. FoIP Research White Paper Considerations for Using T.38 versus G.711 for Fax over IP Abstract: This white paper compares the performance of the two principal options for implementing fax over an IP network: Fax-Relay (T.38) and Fax Pass-Through (G.711) Available from OpenText19 © COPYRIGHT 2012 DIALOGIC, INC. ALL RIGHTS RESERVED. | www.dialogic.com
  20. 20. Considerations Before Choosing a SIP Trunk Provider20 © COPYRIGHT 2012 DIALOGIC, INC. ALL RIGHTS RESERVED. | www.dialogic.com
  21. 21. Replace PRI on legacy PBX with SIP Trunk Enterprise IP Service Gateway Provider SIP TDM T Public D Telephone Legacy TDM M Network PBX Dialogic- based Fax Servers Considerations: SIP Trunk configured for T.38 or G.711 Gateway support faxRecipient/ Senderconventionalfax machine Application Storage Servers21 © COPYRIGHT 2012 DIALOGIC, INC. ALL RIGHTS RESERVED. | www.dialogic.com
  22. 22. FoIP server connected to IP-PBX Enterprise IP Service Border Element Provider SIP Public Dialogic- IP-PBX based Fax Telephone Servers Network Considerations: SIP Trunk configured for T.38 or G.711 IP-PBX support T.38 orRecipient G.711/ Sender Is IP-PBX on Interop list Application Storageconventional Serversfax machine22 © COPYRIGHT 2012 DIALOGIC, INC. ALL RIGHTS RESERVED. | www.dialogic.com
  23. 23. SR140 Directly connected to a SIP Trunk Enterprise IP Service Border Element Provider SIP Public Dialogic- based Fax Telephone Servers Network Considerations: SIP Trunk configured for T.38 or G.711 Is registration and/or authentication required for SIP trunk Is it SIP over TCP or UDP (TCP support available soon)Recipient Does Border Element/ Sender support VoIP/SIP? Application Storageconventional Serversfax machine Will Border Element pass T.38 traffic23 © COPYRIGHT 2012 DIALOGIC, INC. ALL RIGHTS RESERVED. | www.dialogic.com
  24. 24. SIP Trunks: Factors Influencing End-to-End Success SIP trunk provider T.38 support • In the access points and core • Redundancy Number and type of call segments Peering Endpoints Gateway/SBC Fax speed (V.17, V.34) T.30 interoperability Fax document specifics: length, image Network Geographic range Managed (access point, enterprise) Impairment levels (QoS)24 © COPYRIGHT 2012 DIALOGIC, INC. ALL RIGHTS RESERVED. | www.dialogic.com
  25. 25. SIP Trunks: Factors Influencing End-to-End Success Careful selection of SIP trunk provider Specifically offer support for fax, preferably T.38 SLA, access options, and historical data to support QoS Geographical coverage matches your needs In most cases, choose T.38 G.711 can be successful with a well managed network Check the Dialogic website for interoperability testing for network elements and SIP trunk providers If provider or device is not on this list, work with Dialogic to discuss the possibility of arranging a Dialogic Interoperability Test25 © COPYRIGHT 2012 DIALOGIC, INC. ALL RIGHTS RESERVED. | www.dialogic.com
  26. 26. Interoperability Dialogic maintains a list of equipment and SIP trunks that have been successfully tested with Dialogic® Brooktrout® SR140 Fax Software: http://www.dialogic.com/interoperability/fax.htm26 © COPYRIGHT 2012 DIALOGIC, INC. ALL RIGHTS RESERVED. | www.dialogic.com
  27. 27. Dialogic, Veraz, Brooktrout among others as well as related logos, are either registered trademarks or trademarks of Dialogic Inc. and all companies controlling, controlled by, or under common control with Dialogic Inc. (“Dialogic”). The names of actual companies and products mentioned herein are the trademarks of their respective owners. 11/1227 © COPYRIGHT 2012 DIALOGIC, INC. ALL RIGHTS RESERVED. | www.dialogic.com www.dialogic.com

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