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...

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...

Over the past few months we have seen an increase in number of interop cases with Exchange 2010 Unified Messaging (UM) and Cisco Call Manager 7.0 ( Configuration Notes ) and 8.0 ( Configuration Notes ) (CCM). In this article I am going to talk particularly about one case that has seen the most hits which...

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. ...

With the release of Exchange 2010 SP1 we have seen some issues integrating with Nortel CS 1000. Nortel CS 1000 is currently not part of the Telephony Advisory Program and not certified for Exchange 2010 & 2010 SP1. It is currently supported only when it connects to Exchange UM through one of the...

With Exchange Unified Messaging 2010 SP1 the call transfer to extension has improved to facilitate OCS to make the decision on how to route the call. Prior to UM 2010 SP1, UM will send the actual location profile to be used to make the call to the user by OCS. This was indicated in the Refer-To header...