If it is positive true COS anything above +2 should assert COS - in that case you would be using usb NOT usbinvert in your config. COS is blocked by a diode so anything up to 20+ volts on a high is OK. It does have to go to a good low - 0V if possible. Obviously if it is negative true COS it would be just the opposite and using usbinvert. Go into the client - asterisk -rvvv and watch the log. You should see a hungup status on drop of signal. You can exercise this manually for testing if desired. 73 Doug WA3DSP http://www.crompton.com/hamradio From: wb5nfc@gmail.com Date: Sat, 9 May 2015 12:49:35 -0500 To: App_rpt-users@ohnosec.org Subject: [App_rpt-users] DMK URI COS Level / Kenwood TKR-850 Is the 0-5 Volt COS swing on a Kenwood TKR-850 sufficient to switch the COS on a DMK URI? Can't seem to get my system to repeat. I'm out in the 'boondocks' with very few parts and a long way from a Radio Shack. Just hoping I don't need to buffer the COS somehow to get it to switch. John _______________________________________________ App_rpt-users mailing list App_rpt-users@ohnosec.org http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users To unsubscribe from this list please visit http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users and scroll down to the bottom of the page. Enter your email address and press the "Unsubscribe or edit options button" You do not need a password to unsubscribe, you can do it via email confirmation. If you have trouble unsubscribing, please send a message to the list detailing the problem.