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OnPrem Lync Server 2010 cannot direct calls to O365 UM
Recently I have had the opportunity to work on multiple OnPrem Lync Server 2010 (Lync) deployments integrated with O365 Exchange Unified Messaging Servers (UM). Issue Unable to route calls from Lync to UM. If you look at traces from the Lync Edge Server (with SipStack component traced) You should...
13 Oct 2011
Users unable to join Lync hosted conferences from Cisco Unified Communications Manager 8.5
In the past couple of months we have seen increase in DTMF issue relating to Cisco Call Manager v8.5 connecting to Lync Server 2010 (Lync). I worked on a few of these issues giving me an opportunity to dive deep into this integration. Cisco Unified Communication Manager (CUCM) v8.5 is supported with...
4 Oct 2011
LYNC Server 2010 and Communication Server 2007 R2 does not support NET VX 1800 when set up in Hybrid Mode - DTMF issues
Over the past year we have seen multiple issues with NET VX1800 deployed in Hybrid Gateway mode - Gateway + Communication Server 2007 R2 (CS)\LYNC Server 2010 (LS) Mediation Server (MS). Here I am going to talk about one such issue. Symptoms - Unable to make calls outbound from CS\LS to PSTN using...
7 Apr 2011
Exchange 2010 SP1 Unified Messaging cannot transfer call to an extension
There are a number of reasons that may lead to calls not being transferred correctly to extensions homed on gateways - Cisco Call Manager, Audio Codes, OCS\LYNC amongst others, one of them blogged by me here . In this blog I am going to talk about another issue we have seen with our customers. ...
4 Feb 2011
Remote Call Control in Office Communications Server R2 uses UPDATE method to maintain persistent sessions between Communicator 2007 R2 and CSTA Gateway
For most of the administrators who have ran into issues with RCC my colleagues blog has been a great help. With the evolution of OCS and the SIP standard, there have been two changes in the behavior since the time Rajesh put that blog out. Hopefully this blog with help you look out for issues arising...
16 Aug 2010
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