PSTN gateway codec order

green · 10-11-2007, 09:30 PM

Currently when I dial PSTN access number Sipbroker gateway will setup a call with the following codec order:

Code:

RTP/AVP 0 18 8 111 97 3 4 101

a=rtpmap:0 PCMU/8000
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:8 PCMA/8000
a=rtpmap:111 G726-32/8000
a=rtpmap:97 iLBC/8000
a=rtpmap:3 GSM/8000
a=rtpmap:4 G723/8000

It will be more logical to make it looking like 0 8 18 111 97 3 4 101,
i.e. puth both PCM codecs first and lower bandwidth codecs after.

This is my real problem. I'm dialing my home VSP using the SIP-code. The SIP account with my home VSP is forwarded permanently to the local PSTN number. As soon as PCMU is not supported by my VSP the call is established with G.729 (according to Sipbroker's preference) while I need G.711A!

Thanks!

martin · 10-12-2007, 10:08 AM

Depends on the sponsor. Some numbers we physically host so I have made a change to those numbers.

Please confirm the number you were using and if the order has now changed?

Thanks
.

green · 10-12-2007, 08:19 PM

Martin,
thank you very much. It works!

I tested with New York number +1-646-291-2168
According to the source IP address it's the same server or gateway which serves Sweden access number. Last time I had a problem with that particular number. Thanks again.

green · 11-24-2009, 09:38 PM

Same problem again

Tested with Sipbroker iNum access number 883510074022302

received codec order:

Code:

RTP/AVP 18 0 8 111 97 3 4 101

desirable codec order:

Code:

RTP/AVP 0 8 18 111 97 3 4 101

Is it possible to fix this? Thanks!

10-11-2007, 09:30 PM	#1 (permalink)
green Senior Member Join Date: Jul 2007 Posts: 135 Thanks: 13 Thanked 20 Times in 19 Posts	PSTN gateway codec order Currently when I dial PSTN access number Sipbroker gateway will setup a call with the following codec order: Code: RTP/AVP 0 18 8 111 97 3 4 101 a=rtpmap:0 PCMU/8000 a=rtpmap:18 G729/8000 a=fmtp:18 annexb=no a=rtpmap:8 PCMA/8000 a=rtpmap:111 G726-32/8000 a=rtpmap:97 iLBC/8000 a=rtpmap:3 GSM/8000 a=rtpmap:4 G723/8000 It will be more logical to make it looking like 0 8 18 111 97 3 4 101, i.e. puth both PCM codecs first and lower bandwidth codecs after. This is my real problem. I'm dialing my home VSP using the SIP-code. The SIP account with my home VSP is forwarded permanently to the local PSTN number. As soon as PCMU is not supported by my VSP the call is established with G.729 (according to Sipbroker's preference) while I need G.711A! Thanks!

10-12-2007, 10:08 AM	#2 (permalink)
martin Join Date: Feb 2006 Posts: 2,809 Thanks: 522 Thanked 599 Times in 311 Posts	Depends on the sponsor. Some numbers we physically host so I have made a change to those numbers. Please confirm the number you were using and if the order has now changed? Thanks . __________________ Martin Please post support questions on the forum. Do not send PMs unless requested. For real time Voxalot updates click HERE and add yourself to the group. Follow Martin on twitter

10-12-2007, 08:19 PM	#3 (permalink)
green Senior Member Join Date: Jul 2007 Posts: 135 Thanks: 13 Thanked 20 Times in 19 Posts	Martin, thank you very much. It works! I tested with New York number +1-646-291-2168 According to the source IP address it's the same server or gateway which serves Sweden access number. Last time I had a problem with that particular number. Thanks again. Last edited by green; 10-12-2007 at 08:24 PM. Reason: details added

11-24-2009, 09:38 PM	#4 (permalink)
green Senior Member Join Date: Jul 2007 Posts: 135 Thanks: 13 Thanked 20 Times in 19 Posts	Same problem again Tested with Sipbroker iNum access number 883510074022302 received codec order: Code: RTP/AVP 18 0 8 111 97 3 4 101 desirable codec order: Code: RTP/AVP 0 8 18 111 97 3 4 101 Is it possible to fix this? Thanks!

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