[cisco-voip] One-way audio issues when transferring a call

[Mike Armstrong]

Several others have reported a similar problem.  In our case, it's only been 
seen after 2 transfers: Outside caller calls operator (7960), who forwards 
it to admin asst (7960), who forwards it to 7935 conference phone, where 
they see one-way audio (we hear the caller, caller can't hear us).  We work 
around the problem in one of 2 ways: 1) have the 7935 call the outside 
party,  or 2) assign a DID number to the 7935 and have the outside party 
call in directly to the 7935; good for meet-me conferences.

We've upgraded to 4.1(3) since this first appeared; don't know if the 
problem still exists.  When I get around to testing again, if it still 
exists I'll open a TAC case.

Mike Armstrong
UF/IFAS CREC
Lake Alfred, FL

T1/PRI         H.323
 PSTN --->VG3640--->CCM4.1(2)


> Date: Wed, 29 Jun 2005 22:23:59 +0200
> From: "Ruben Montes" <Ruben.Montes at eu.didata.com>
> Subject: [cisco-voip] One-way audio issues when transferring a call
> To: "Ryan Ratliff" <rratliff at cisco.com>
> Cc: cisco-voip at puck.nether.net
> Message-ID:
> <836C71F1C69CA54E85743AFD2233C6C1666A8C at euesbcnsvex.eu.didata.local>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hello,
>
> I have one-way audio issues in two situations:
> -One person with an IP phone(assistant) calls a customer and then 
> transfers the call to the manager (IP phone): the manager can hear the 
> customer but not viceversa.
> -A person who is talking receives a second call: he holds the first one 
> and answers the second; when he tries to resume the first call he has 
> one-way audio issues...
>
> Any idea? Maybe binding the rtp, or rtcp or h323 protocol to any specific 
> interface...
>
> Any help would be appreciated..
>
> Regards,
>
> Ruben