[Asterisk-Users] unable to configure my Grandstream phone

[Paul Liew]

----- Original Message ----- 
From: Balaji NJL
To: asterisk-users at lists.digium.com
Sent: Monday, December 15, 2003 8:47 AM
Subject: [Asterisk-Users] unable to configure my Grandstream phone


<snip>
> Attempting native bridge of SIP/2003-b895 and SIP/2000-53e2
> WARNING[5126]: File chan_sip.c, Line 1954 (process_sdp): No compatible
codecs!
>     -- Got SIP response 481 "Call Leg/Transaction Does Not Exist" back
from 192.168.0.58
>
> and then the call drops. When i am making a call using Grandstream ph, it
rings the other side when they pick up the phone the call then drops. then i
get the
> above error message.
>
> the follwoing us sip and Grandstream conf
>
>
> [general]
> port = 5060
> bindaddr = 0.0.0.0
> context = bogon-calls
> ;context = default
> disallow=all
> allow=gsm

Balaji,

Grandstreams do not support GSM. Options available can be seen on the GS
config page. Unless you purchase G729s (for low bandwidth), your only choice
is G711.

Paul