Issue with DTMF While in Conference Call
I am currently investigating an issue I have internally, and have heard someone else having on the Technet forums: http://social.technet.microsoft.com/Forums/en-US/ocsconferencing/thread/f9512694-c298-4951-b6d6-0d240ccd0397
The issue is that when in a communicator conference call, you cannot send DTMF tones to a PSTN participant. The scenario is as follows:
- Communicator call, or communicator conference call is initiated
- User invites a PSTN number to that conference call
- PSTN number requires DTMF tones, whether it is a conference bridge, or an attendant menu, could be various situations
- No DTMF is received by the PSTN number.
So far, I have been able to confirm a couple of things. This happens with CS2010 as well as OCS 2007 R2. Internally we use a Dialogic DMG2120 gateway, and I have confirmed that I do not see DTMF on the gateway’s SIP side from OCS.
I am using this post to hopefully get some partners and customers to try this scenario, and see if they have the same issue. I would find it hard to believe that this is a bug in OCS/CS2010 that Microsoft has not addressed, but I am hoping to find a common configuration among people experiencing this issue so we can maybe narrow it down.
Typically this is a gateway issue, however like I said, I have not seen any DTMF come from OCS to the gateway when in the conference call.
Please respond in the comments with a brief description of your OCS setup and gateway/SIP trunk, and if you experience this issue or not.
It is identified in the above article. AVMCU does not support DTMF Relay. Thanks to the commenter!
Posted on July 13, 2010, in Audio/Video MCU, Communications Server 2010, Conferencing, Dialogic, Enterprise Voice, OCS 2007 R2, Unified Communications and tagged Communicator, Conferencing, CS 2010, DTMF, OCS, PSTN. Bookmark the permalink. 7 Comments.