[cisco-voip] One-way audio after 2nd transfer

[Tim Medley]

Mike,

I was wasn't trying to blame the issue on 4.1(2). A one way audio problem is
usually related to an issue with NAT or a forewall/acl type blocking.

You may be running into a new bug, I would open a ticket with TAC and see
what they say, they will probabally ask you to sniff the network and see
what the output shows.

tm

Tim Medley
http://www.medleylabs.com
 

http://www.sccp2000.com IP Telephony News, Tips and Tricks


-----Original Message-----
From: Mike Armstrong [mailto:mfa at crec.ifas.ufl.edu] 
Sent: Tuesday, March 29, 2005 9:12 AM
To: medley at mac.com; cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] One-way audio after 2nd transfer

Both are in the same device pool, same VLAN.  Also, this has worked in the 
recent past, I'm told, so I don't think it can be blamed on 4.1(2), which 
was installed last year.  However, both ciscocm.4-1-2-sr1 and 
win-OS-Upgrade-K9.2000-2-7sr2 were installed on 3/20 and could be suspect.

mike
----- Original Message ----- 
From: "Tim Medley" <medley at mac.com>
To: "'Mike Armstrong'" <mfa at crec.ifas.ufl.edu>; <cisco-voip at puck.nether.net>
Sent: Monday, March 28, 2005 6:47 PM
Subject: RE: [cisco-voip] One-way audio after 2nd transfer


> Is the 7935 in the same device pool as the receptionist 7960? Could be a
> codec issue.
>
> Are the Gateway and the 7935 separated by a router or firewall? Could be 
> an
> ACL, NAT or a Firewall blocking some traffic.
>
> tm
>
> Tim Medley
> http://www.medleylabs.com
>
>
> http://www.sccp2000.com IP Telephony News, Tips and Tricks
>
>
> -----Original Message-----
> From: cisco-voip-bounces at puck.nether.net
> [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Mike Armstrong
> Sent: Monday, March 28, 2005 5:42 PM
> To: cisco-voip at puck.nether.net
> Subject: [cisco-voip] One-way audio after 2nd transfer
>
> Today we experienced a repeatable one-way audio problem:
>
> Inbound PSTN call -> PRI -> 3640 H.323 -> CCM 4.1(2)
>
> The call went to the receptionist (7960), who transferred it to an
> administrative assistant (7960), who transferred it to a 7935 conference
> phone.  At the 7935, only outbound audio worked; no inbound audio was 
> heard.
>
> They tried about 4 calls, and rebooted the 7935 once before giving up,
> ultimately placing the call from the 7935 to the outside party. 
> Everything
> went fine from that point.  Is this a known problem to anyone?  I'll start
> digging into the traces tomorrow, but would wlecome any labor-saving
> guidance.
>
> Mike Armstrong
> UF/IFAS CREC
> Lake Alfred, FL
>
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