Incoming Calls Get 488 Error

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Asterisk Users 2 Comments

I got a new SNOM M65 which works fine for outgoing calls, but incoming calls never ring at the handset. I captured the SIP traffic and see that my M65 is replying with an “488 not acceptable here”. From what I
read this is usually codec related but both asterisk and the M65 are set for ulaw as first choice.

I have a SIP trace below. Can someone suggest why the 488 is being generated?


2 thoughts on - Incoming Calls Get 488 Error

  • Hi, By the sip trace is very difficult to tell because the SIP messages are fine. Try to enable all codec, and if possible copy and paste your asterisk sip configuration for this peer.

    Enviado do meu telefone Android usando o Symantec TouchDown (

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  • Looks like the SNOM does not accept the video call. Maybe you should look into why the Asterisk is trying to use video in the first place.