strange CODEC NEGOTIATION ERROR

[topogigio]

Hi,
I have a PBX running well, but a single phone cannot call. The phone is a Yealink T33G.

Every time it tries an outgoing call (to external o internal recipients) it fails with CODEC NEGOTIATION ERROR.
CDR reports always PCMA/PCMA as codec, that is ok.

Calls TO this phone work well.

I was forced to connect the phone using TCP instead UDP as transport beacuse using UDP it does not perform MD5 auth (strange), but I think this cannot be the problem.

Any idea?

 

[pbxgeek]

Paste a complete log so we can see where the problem is. Also try to update the firmware. Older Yealinks have weird issues like that sometimes. You may have to hunt the internet to find it, though if the phone is discontinued.