Searching for Lync Early Media Support information? Find all needed info by using official links provided below.
https://social.technet.microsoft.com/forums/lync/en-US/ab73abd2-7be0-4d02-87e5-c2cfb88d2297/early-media-issue
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http://blog.greenl.ee/2012/05/16/shortening-answer-delay-early-media/
Early media works perfectly for Lync callers but some “qualified” PSTN gateways (e.g. AudioCodes Mediant) deliver ringback tone to PSTN callers instead of the early media played by the UCMA application. This issue is very annoying but hey this is SIP; the world of interoperability …. So please be careful with early media …
https://docs.microsoft.com/en-us/skypeforbusiness/lync-cert/qualified-ip-pbx-gateway
On Lync Mediation Server, Enable Media Bypass and Disable REFER and RTCP. Testing determined that Mitel does not support REFER and RTCP. Known Limitations: When a Mitel user calls a Lync user, there is no ring back tone provided for the Mitel user. Mitel is investigating adding RFC 3960 support in the future. Mitel does not support comfort noise.
https://social.technet.microsoft.com/forums/lync/en-US/6f4b5be7-242f-4caf-8e54-23e9856f069c/early-media-configuration
Oct 08, 2011 · Support TechCenter ... Lync 2010 and OCS ... We are currently experiencing a 2 sec lag on most incoming phone calls, the suggestion made by Microsoft was to enable early media. Our environment includes. OCS 2007 R2 EE -> Mediation Server ->Nortel MCM/OCS Proxy -> CS 1000 pbx.
https://www.agileit.com/news/lync-2010-voip-media-bypass-and-external-pstn-sip-trunk-provider/
Jan 12, 2011 · Lync Server 2010 Sip Trunk can support media bypass when the following options are considered. ... Lync 2010 VOIP Media Bypass and External PSTN SIP Trunk Provider. Posted on January 12, 2011 ... to obtain the value for the maximum number of early dialogs that the gateway, PBX, or SBC can accept.Reviews: 1
https://voipnorm.blogspot.com/2013/06/updated-again-important-settings-to.html
Updated Again: Important Settings to Know When Integrating Lync Server 2010/2013 with Cisco ISR’s ... Support for SIP Refer is a good example. ... will cause the gateway to ignore 183 messages and signal the caller system to play local ringback rather than create a early media session with Lync. Lync does not provide early media for remote ...
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