[App_rpt-users] Debugging COS

Ken 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.

 

Ken

 

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
about
> 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
unmodified
> 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
built-in
> diagnostics...

> 73,

> Andrew
> ZL3AME

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?

Jim M0HPJ

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.

TIA

-- 
Jim Whiteside.
M0HPJ

[usb28233]
hdwtype=0    
rxboost=1
txboost=0
rxctcssrelax=1
txctcssdefault=94.8
rxctcssfreqs=94.8    
txctcssfreqs=94.8
;rxctcssoverride=0
carrierfrom=usbinvert
ctcssfrom=no
rxdemod=speaker
txprelim=no
txlimonly=no
txtoctype=notone
txmixa=composite
txmixb=no
invertptt=0
duplex=0
rxondelay=0
rxnoisefiltype=0
eeprom=0




-- 
Jim Whiteside.

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.allstarlink.org/pipermail/app_rpt-users/attachments/20120212/abd29f1e/attachment.html>


More information about the App_rpt-users mailing list