[App_rpt-users] Debugging COS
ke2n at cs.com
Sun Feb 12 07:39:56 EST 2012
So - are you sure it is a 108?
When you type "lsusb" at the Linux command line do you get
: ID 0d8c:013c C-Media Electronics, Inc.
From: app_rpt-users-bounces at ohnosec.org
[mailto:app_rpt-users-bounces at ohnosec.org] On Behalf Of Jim Whiteside
Sent: Sunday, February 12, 2012 7:34 AM
To: app_rpt-users at ohnosec.org
Subject: Re: [App_rpt-users] Debugging COS
> Assuming COS is connected to the Volume Down pin on the CM108 then how
> plugging the fob into another PC which is not running the Asterisk drivers
> and see if the volume control is affected when COS is asserted?
> On my PC, if I press volume down, either on the keyboard or on an
> USB sound fob then a volume bar pops up in the centre of the screen. It's
> very visible.
> Naturally, there may be a 'correct' way to do this with some sort of
That's a good plan.
So I take an unmodified fob, that does have volume buttons on, and plug it
into a PC. 'volume down' button does indeed trigger the windows volume bar.
But this fob and button don't do anything on Asterisk.
My modified fob - taking pin 48 to gnd also triggers the volume down on
Windows, so that suggests it's not hardware?
On 12 February 2012 11:45, Jim Whiteside <jaydublu2002 at gmail.com> wrote:
I'm still chipping away at modifying a Startech CM108 USB fob - so far I
have successfully got PTT and audio out working, but I'm struggling with
audio in and COS.
I've been following http://www.qsl.net/k0kn/cm108_mod.html
Can anyone advise if there's a way to determine from the Asterisk side if
COS is active or not?
I've even tried manually taking the CM108 pin 48 to 0v and +5v with the
iax.conf below, but I can't seem to make anything 'happen'.
My theory was, as soon as I have COS triggering Asterisk correctly, then I
can look at getting the audio in working properly.
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