> > > I've a question about the bandwidth consumed by IAX2/GSM. > > > > > > According to the wiki page, the GSM codec should run about 13 kilo-bits/sec > > > for a voice encoding. > > > > > > However, watching gkrellm when I initiate a call to Digium, it looks like the > > > channel is taking a consistent 5-6 kilo-bytes/sec. That's a lot more > > > bandwidth than it should take. Is there perhaps a setting I have wrong > > > somethere in the conf files? > > > > > > I have: > > > bandwidth=low > > > disallow=all > > > allow=gsm > > > > > > so it's surely using GSM and it should be gearing itself for a low-bandwidth > > > situation. > > > > > > The codec itself takes 13kbps, but by the time the codec frames are > > wrapped in all the IP overhead it is a lot more. > > Yes, I understand about overhead, but this is 4x the bandwidth usage. Even if > that is 13kbps for each stream of audio (23kbps total), that is doubled by > (TCP/UDP)/IP overhead. That struck me as a lot of overhead. I guess, though, > that since the packets need to be sent quite frequently, that could happen.
Just a guess here and I've not use gkrellm at all, but is it possible gkrellm is adding incoming & outgoing traffic together? If I take your numbers, divide by two, the result is roughly equivalent to the actual codec bandwidth plus the pkt overhead for data moving in each direction. _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
