Voice over GPRS?

Fri Feb 2 17:58:45 CET 2007

Salve ROB!
ROB schrieb am Freitag, den 02. Februar 2007 um 11:37h:
> Bit rate=sampling rate x bit depth
>> 1kb/s isn't going to get you too much audio. 
I wrote 1KB/s and I meant 1kB/s, or 8000 baud.
Already tested quality=0 speex and iax succsessful.
Maybe I did something wrong but this gives realy
a good enough quality - consider how old the GSM codec
is.
From my /etc/asterisk/codecs.conf
[speex]
; CBR encoding quality [0..10]
; used only when vbr = false
quality => 0
http://www.voip-info.org/wiki/view/Asterisk+config+codecs.conf
quality 0 = mode 1 = 2,150kbps. 
From asterisk CLI:
 -- Executing Dial("SIP/rob-c7c7",
 "IAX2/astblufunk:[astblufunk]@asttangop/17241") in new stack
 -- Called astblufunk:[astblufunk]@asttangop/17241
 -- Call accepted by 84.16.228.211 (format speex)
 -- Format for call is speex
 -- Accepting AUTHENTICATED call from 84.16.228.211:
 > requested format = speex,
 > requested prefs = (),
 > actual format = speex,
 > host prefs = (speex),
 > priority = mine
 -- Executing Answer("IAX2/asttangop-10", "") in new stack
 -- IAX2/asttangop-9 answered SIP/rob-c7c7
I promise to put examples on my webpage in 14 days.
Greetings,
rob