Hello,
 
I have a problem with a cisco GW, if i only set g711 ulaw or alow as codec in my ata the the GW return a media not acceptable error.
 
but If i add the g729 codec the all is ok.
I see in the config of the cisco where to define codec for imcoming call but not for outgoing
 
*Jul 17 15:57:02.604: Received:
INVITE sip:0041787518551@192.168.0.110 SIP/2.0
Via: SIP/2.0/UDP 192.168.0.107:5070;branch= z9hG4bK5f66.fc82e301.0
To: <sip:0041787518551@192.168.0.110>
From: 021111111 <sip:021111111@peoplefone.ch >;tag=27B98752-469CEA8A0002F2E4-5F903B30
CSeq: 10 INVITE
Call-ID: 1973211C-469CEA8A0002F2EA-5F903B30@212.203.123.82
Content-Length: 250
User-Agent: OpenSER (1.2.1-notls (i386/linux))
Contact: <sip:sems@192.168.0.107:5070>
P-MsgFlags: 0
billingid: 106
accountid: 28928
Remote-Party-ID: <sip:0445532001@192.168.0.106 >;party=calling;id-type=subscriber;screen=yes
Content-Type: application/sdp

v=0
o=MxSIP 0 198 IN IP4 192.168.0.249
s=SIP Call
c=IN IP4 200.200.100.106
t=0 0
m=audio 39318 RTP/AVP 8 0 101
a=rtpmap:8 PCMA/8000
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=sendrecv
a=direction:active
a=nortpproxy:yes

*Jul 17 15:57:02.608: 0x64C01D00 : State change from (STATE_NONE, SUBSTATE_NONE)  to (STATE_IDLE, SUBSTATE_NONE)
*Jul 17 15:57:02.608: sipSPIStreamTypeAndDtmfRelay: ERROR - no voice codec and no dtmf-relay match
*Jul 17 15:57:02.608: sipSPIDoAudioNegotiation: Media negotiation failed for m-line 1

*Jul 17 15:57:02.608: sipSPIDoMediaNegotiation: ERROR - no valid fax or audio streams
*Jul 17 15:57:02.608: sipSPIHandleInviteMedia: Media Negotiation failed for an incoming call - Sending 488

*Jul 17 15:57:02.608: 0x64C01D00 : State change from (STATE_IDLE, SUBSTATE_NONE)  to (STATE_DISCONNECTING, SUBSTATE_NONE)
*Jul 17 15:57:02.608: Sent:
SIP/2.0 488 Not Acceptable Media
Via: SIP/2.0/UDP 192.168.0.107:5070;branch=z9hG4bK5f66.fc82e301.0
From: 021111111 <sip:021111111@peoplefone.ch>;tag=27B98752-469CEA8A0002F2E4-5F903B30
To: < sip:0041787518551@192.168.0.110>;tag=C0E57710-2347
Date: Tue, 17 Jul 2007 15:57:02 GMT
Call-ID: 1973211C-469CEA8A0002F2EA-5F903B30@212.203.123.82
Server: Cisco-SIPGateway/IOS-12.x
CSeq: 10 INVITE
Allow-Events: telephone-event
Content-Length: 0