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