[Asterisk-Users] Polycom IP500 Forward problem codec issue
Charlie Watts
cwatts at mercurypay.com
Mon May 2 07:31:28 MST 2005
I'm using ulaw, but seeing this problem as well.
Are you using CVS? I would swear it didn't do this to me in earlier tests, but it is doing it now. I will try to track down the specific change tonight ...
My solution for now is to Answer() the call before dialing out. I changed all of my outbound dialing rules from:
[trunklocal]
exten => _9NXXXXXX,1,Dial(${TRUNK}/${EXTEN:${TRUNKMSD}})
To:
[trunklocal]
exten => _9NXXXXXX,1,Answer
exten => _9NXXXXXX,n,Dial(${TRUNK}/${EXTEN:${TRUNKMSD}})
This seems to fix it, and I haven't identified any side effects.
I need to do this anyway to workaround an early-media problem I have.
Does it work for you after this change?
-----Original Message-----
From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Scott Herrick
Sent: Saturday, April 30, 2005 8:49 AM
To: asterisk-users at lists.digium.com
Subject: [Asterisk-Users] Polycom IP500 Forward problem codec issue
Polycom IP500 Forward problem codec issue
All,
I’m running the Polycom IP500 phones at several sites. My * server is
at a collocation site and I have complete control of the T1’s running to the remote sites with the IP500 phones. Connectivity to the PSTN is
through a Cisco 2600 with a PRI card. During initial testing I ran
G711/ulaw but have added G729 licenses to the system.
Problem: When the forwarding function on the Polycom phones is enabled the forward/transfer does work but the caller does not hear any ringing.
During the time that the caller should hear ringing the * console produces pages of errors.
<snip>
…..
Apr 30 08:41:03 NOTICE[2813]: channel.c:1314 ast_read: Dropping incompatible voice frame on Local/-------0509 at TPN-498a,2 of format g729 since our native format has changed to ulaw Apr 30 08:41:03 NOTICE[2813]: channel.c:1314 ast_read: Dropping incompatible voice frame on Local/-------0509 at TPN-498a,2 of format g729 since our native format has changed to ulaw …..
</snip>
I have tested this with the phones behind a PIX firewall with NAT, behind a PIX firewall without NAT, and without a firewall at all. Nat is not the problem.
In the SIP.conf canreinvite=no so all traffic should be passing through the * server.
The problem seems to be in the translation of the G729 packets from the
phone to the G711 packets to the router. Only during the forwarding
process is this a problem.
Here is a snip from the console when it worked.
(Note: it worked because I was ringing two phones with this line in my extensions.conf (exten => ------6081,1,Dial(SIP/------6081&SIP/------6091,20)
=========<SNIP>
-- Executing Goto("SIP/---.----.241.35-40400490", "TPN|------6081|1") in new stack
-- Goto (TPN,------6081,1)
-- Executing Dial("SIP/---.---.241.35-40400490",
"SIP/------6081&SIP/------6091|20") in new stack
-- Called ------6081
-- Called ------6091
-- Got SIP response 302 "Moved Temporarily" back from ------.92.27
-- Now forwarding SIP/---.---.---.35-40400490 to 'Local/--------0509 at TPN' (thanks toSIP/------6091-6268)
-- Executing Dial("Local/-------0509 at TPN-48f0,2",
"SIP/-------0509 at ---.---.-41.35") in new stack
-- Called ------0509 at ---.---.241.35
-- SIP/------6081-e558 is ringing
-- SIP/---.---.241.35-f522 is making progress passing it to
Local/-------0509 at TPN-48f0,2
-- Local/-------0509 at TPN-48f0,1 is making progress passing it to SIP/---.---.241.35-40400490
-- SIP/---.---.241.35-f522 answered Local/-------0509 at TPN-48f0,2
-- Local/-------0509 at TPN-48f0,1 answered SIP/---.---.---.35-40400490
== Spawn extension (TPN, ------6081, 1) exited non-zero on 'Local/-------0509 at TPN-48f0,2<ZOMBIE>'
-- Attempting native bridge of SIP/---.---.241.35-40400490 and
SIP/---.---.241.35-f522
==========</SNIP>
Now here is the console output with a single phone defined in the extensions.conf (exten => ------6081,1,Dial(SIP/------6091,20)
*********<SNIP>
Asterisk-A*CLI>
-- Executing Goto("SIP/---.---.241.35-40418730", "Charity|------3263|1") in new stack
-- Goto (Charity,-------263,1)
-- Executing Dial("SIP/---.---.241.35-40418730", "SIP/------3263|18") in new stack
-- Called ------3263
-- Got SIP response 302 "Moved Temporarily" back from ---.---.243.5
-- Now forwarding SIP/---.---.241.35-40418730 to 'Local/-------0059 at Charity' (thanks to SIP/------3263-f670)
-- Executing Dial("Local/-------0059 at Charity-da6c,2",
"SIP/------0059 at ---.---.241.35") in new stack
-- Called ------0059 at ---.---.241.35
-- SIP/---.---.241.35-36ca is making progress passing it to
Local/-------0059 at Charity-da6c,2
-- Local/-------0059 at Charity-da6c,1 is making progress passing it to SIP/---.---.241.35-40418730 Apr 29 11:30:03 NOTICE[2197]: channel.c:1314 ast_read: Dropping incompatible voice frame on Local/-------0059 at Charity-da6c,2 of format
g729 since our native format has changed to ulaw … …<pages of the same error> … Apr 29 11:19:18 NOTICE[2185]: channel.c:1314 ast_read: Dropping incompatible voice frame on Local/-------0059 at Charity-5686,2 of format
g729 since our native format has changed to ulaw
-- SIP/---.---.241.35-4e1f answered Local/-------0059 at Charity-5686,2
-- Local/-------0059 at Charity-5686,1 answered SIP/---.---.241.35-40400490
-- Attempting native bridge of SIP/---.---.241.35-40400490 and SIP/---.---.241.35-4e1f == Spawn exten (Charity, -------0059, 1) exited non-zero on 'Local/-------0059 at Charity-5686,2'
*********</SNIP>
I’m sure I could change everything to ulaw G711 the problem would go away but I do not want to do that.
Any Ideas?
Thanks
Scott H
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