[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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