I’ve just managed to make my first external call to one of the SIP phones on my network… this was a great breakthrough! However, the call quality on the external callers phone is really bad, with scratchy sound, clipped and choppy voices etc. The sound quality on the internal SIP phone is excellent however.
Can anybody point to some obvious ways of increasing the quality of the external user’s phone call? is there a conf file to alter the bit rate/codec etc?
All of the SIP phones are connected to the Asterisk server via a separate layer 2 gigabit switch (no other workstations are on here) and all SIP to SIP calls have no qulaity problems. the incoming call is being made through a 4 channel ISDN setup. The server is running a basic Fedora Core 4 setup with no X installed.
Thanks in advance.