asterisk users - Nov 2004 - Asterisk refuses to use anything but g729

This is really stupid behavior of asterisk. I have an ATA and an IP phone
that I have set to use 711. These two devices MUST use 711 because they are
for faxing. I have some other phones that are set to use 729. In my
sip.conf:

disallow=all
allow=g729
allow=ulaw
allow=alaw
allow=gsm

The phones that are set to 729 work great. However, the other phones do not
use 711. Asterisk FORCES them to use 729 when I have EXPLICITLY set the
devices to use 711. WHY is asterisk forcing these devices to use something I
told them not to use?

g729 is at the top of my allow'd list because I want any other phone/ATA to
use 729 first. But if the device is set to "no 729" then why is 729
still
happening?

Is there some other config option to force a device/extension to use only 1
specific codec?

Thanks,
Matthew

"Matthew Boehm" <mboehm@cytelcom.com> writes:
> This is really stupid behavior of asterisk. I have an ATA and an IP
> phone that I have set to use 711. These two devices MUST use 711
> because they are for faxing. I have some other phones that are set
> to use 729. In my sip.conf:
>
> disallow=all
> allow=g729
> allow=ulaw
> allow=alaw
> allow=gsm
> 
> The phones that are set to 729 work great. However, the other phones
> do not use 711. Asterisk FORCES them to use 729 when I have
> EXPLICITLY set the devices to use 711. WHY is asterisk forcing these
> devices to use something I told them not to use?
I guess you've got this in the [general] section, then?  The codec
list there is a specification of which codecs are allowed, and they
are listed in order of priority.  Thus, with your list, anything that
*can* speak g729 *will* do so.  You can override that, in individual
per-phone sections in the file:

[faxmachine]
disallow=all
allow=ulaw

-tih
-- 
Tom Ivar Helbekkmo, Senior System Administrator, EUnet Norway Hosting
www.eunet.no  T +47-22092958 M +47-93013940 F +47-22092901 FWD 484145

Matthew Boehm [mboehm@cytelcom.com] wrote:
> This is really stupid behavior of asterisk. I have an ATA and an IP phone
> that I have set to use 711. These two devices MUST use 711 because they
> are for faxing. I have some other phones that are set to use 729. In my
> sip.conf: 
> 
> disallow=all
> allow=g729
> allow=ulaw
> allow=alaw
> allow=gsm
> 
> The phones that are set to 729 work great. However, the other phones do
> not use 711. Asterisk FORCES them to use 729 when I have EXPLICITLY set
> the devices to use 711. WHY is asterisk forcing these devices to use
> something I told them not to use? 
> 
> g729 is at the top of my allow'd list because I want any other
phone/ATA
> to use 729 first. But if the device is set to "no 729" then why
is 729
> still happening? 
> 
> Is there some other config option to force a device/extension to use only
> 1 specific codec? 
> 
You'll probably find that the device has a "preferred codec"
setting,
rather than an "only use this codec" setting.  If you've told
Asterisk
to try G.729 in your allow list then it'll try it and succeed (if you've
paid off the monopolists).  If you only want to use G.711/ulaw then why
have you added other codecs to your allow list?

Perhaps you've only defined the "allow" list globally.  Did you
know
that each sip.conf block can define its own local "allow" list,
overriding the global list?  If you're not doing so then define a
"disallow = all" directive, and "allow = whatever" list, for
each
block that needs to override the global settings.

-- 
   _/   _/  _/_/_/_/  _/    _/  _/_/_/  _/    _/
  _/_/_/   _/_/      _/    _/    _/    _/_/  _/   K e v i n   W a l s h
 _/ _/    _/          _/ _/     _/    _/  _/_/    kevin@cursor.biz
_/   _/  _/_/_/_/      _/    _/_/_/  _/    _/