[Asterisk-Users] iaxtel and jitterbuffer

Michael George
2004-08-27T11:58:24Z

I am trying to work out IAX <--> IAX communications with my * box.  I have
a
registration with iaxtel and I thought I would start there for my learning.

I am able to call the number for Digium's support line (700-428-6000), but
the
sound is horribly chopping.  Some reading revealed the jitterbuffer settings,
so I enabled them in iax.conf.  I have the following now:

; Inter-Asterisk eXchange driver definition
;
[general]
; Specify bandwidth of low, medium, or high to control which codecs are used
; in general.
;
bandwidth=low
;
; You can also fine tune codecs here using "allow" and
"disallow" clauses
; with specific codecs.  Use "all" to represent all formats.
;
disallow=lpc10			; Icky sound quality...  Mr. Roboto.
allow=gsm			; Always allow GSM, it's cool :)

jitterbuffer=yes
dropcount=3
maxjitterbuffer=500
maxexcessbuffer=100
minexcessbuffer=10
jittershrinkrate=1

register => XXXXXXXX:xxxxxxx@iaxtel.com

; Finally, you can set values for your TOS bits to help improve
; performance.  Valid values are:
;   lowdelay		-- Minimize delay
;   throughput		-- Maximize throughput
;   reliability		-- Maximize reliability
;   mincost		-- Minimize cost
;   none		-- No flags
;
tos=lowdelay

but I still have a less-than-acceptible quality connection.  The bandwidth
usage is right around 5.5-6kbps.  I have a multivoip that ran at about that
rate and sounded fine (obviously with a different codec, but my point is that
my broadband connection shouldn't be the issue).

Any helpful suggestions?

--
-M

There are 10 kinds of people in this world:
	Those who can count in binary and those who cannot.