[cisco-voip] Difference between transfer and conference

[Dennis Heim]

Possible DSP issues maybe?

Dennis Heim
Network Voice Engineer
CDW  Advanced Technology Services
11711 N. Meridian Street, Suite 225
Carmel, IN  46032

317.569.4255 Office/Home Office
317.569.4201 Fax
317.694.6070 Cell
dennis.heim at cdw.com<mailto:dennis.heim at cdw.com>
cdw.com/content/solutions/unified-communications/<http://www.cdw.com/content/solutions/unified-communications/>

From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Scott Voll
Sent: Wednesday, November 03, 2010 2:14 PM
To: cisco-voip at puck.nether.net
Subject: [cisco-voip] Difference between transfer and conference

as far as the call setup / call flow, what is the difference between a transfer and conference.  Forgive me if someone answered before.

we have been having on going issues with telecommuters (IP communicator) getting calls transfered to them from our operators.

Call can be transfered and we get the call connected but no way audio (sounds like a codec issue to me But it doesn't fail.... we have to hang up) but doing the same thing with the conference button then dropping off the call works fine.

had about 3-8 TAC cases open on this and still have the same issue.  much less, but still have the issue.

Call flow is call comes in PSTN via PRI / or CAS T1 on a 3845 running 15.0.1M3 (one TAC case had us add mgcp behavior g729-variants static-pt
mgcp behavior dynamically-change-codec-pt disable which helped a lot but didn't fix the whole problem)

goes to UCCx agent (otherwise known as operator) who transfers to IP Communicator (telecommuters).  The problem we still have is that sometimes (2-10 times a day) we get the call transfered but there is no audio.  But if they instead conference them in then exit the conference it works.

other TAC cases we have open are for IP Communicator and are working on upgrading all IPC users to 7.0.5.1.

What would a transfer do(or not do), that a conference call doesn't?

any comments / thoughts / answers appreciated.

Scott
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