cme SIP/2.0 488 Not Acceptable Media

[mkhriesa]

Hi,

we have an issue with incoming calls on CME 11 with SIP trunk

SIP/2.0 488 Not Acceptable Media

when I change the codec to G711alw I got:

Via: SIP/2.0/UDP 213."Transcoder Not Configured"

dial-peer voice 21 voip
 translation-profile incoming 100
 session protocol sipv2
 session target ipv4:213.139.43.143
 session transport udp
 incoming called-number .
 voice-class sip dtmf-relay force rtp-nte
 voice-class sip bind control source-interface GigabitEthernet0/0/1
 voice-class sip bind media source-interface GigabitEthernet0/0/1
 dtmf-relay rtp-nte sip-kpml
 codec g711ulaw
 no vad

attached is the debug ccsip for both codec

[mkhriesa]

g7alw attached

[mkhriesa]

its working fine with 3905
the issue only on 88XX

[Georgios Fotiadis]

Can you also include (and attach) debug voip ccapi inout (along with debug ccsip messages) and your full configuration? It is probably a codec issue.

[Steven Landon · Accepted solution]

it looks like your carrier wants G711alaw.

when you have the gateway configured for G711ulaw, the carrier responds that it will not accept that CODEC.

when you change to alaw, the gateway wants to transcode.

this means that the end device inside your network is not configured to allow alaw so a transcoder is needed.

you need to post your full config for CME