Hi,

I'm having real difficulty in getting calls to go through with 
Asterisk.  I've managed to check that my SIP connection is made to my 
provider.  Below is an email I received from them:

----------------snip--------------------------------snip--------------------------------snip----------------
I am not certain of the reason for rejection but it has to do with the 
SDP,  it does not seem to be a codec issue, the response is as you have 
seen:

SIP/2.0 488 Not Acceptable Here
Via: SIP/2.0/UDP 
192.168.0.14;received=172.28.20.106;branch=z9hG4bK42d2ea03;rport=60017
From: "Andy" <sip:[email protected]>;tag=as5c784926
To: <sip:[email protected]>;tag=SD24jn898-4C46B8A2-5688CB2-0ADE2C09
Call-ID: [email protected]
CSeq: 102 INVITE
Reason: Q.850 ;cause=127 ;text="Interworking, unspecified"
Content-Length: 0

There looks to be a non-standard element in your SDP that is not 
supported by any of the networks.
----------------snip--------------------------------snip--------------------------------snip----------------

Which configuration file is possibly incorrect in this scenario?

What dumps are likely to be useful to me?

Thanks,
  Andy

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