[Serusers] Problems with Grandstream budgetone and handytone

Maxim Sobolev sobomax at portaone.com
Thu Dec 18 00:20:00 CET 2003


Maxim Sobolev wrote:

> Folks,
> 
> It is not really ser-specific problem, but I think that it is a good 
> place to ask. We are having problems with getting BT/HT working with our 
> system - phones with firmware versions 1.0.4.26 and 1.0.4.17 don't send 
> ACK for final 200 OK if the in-band alerting (183 session progress) is 
> enabled in the remote UA. Can somebody confirm this problem? And it 
> seems that version 1.0.3.81 is OK, but unfortunately there is no way to 
> perform firmware downgrade.

Nailed it down - the damn thing doesn't like when To tag in provisional 
responses differ from one in final one.

-Maxim




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