Wow, thanks for all the replies guys!I

Mike: I've played with the logic in both states just to be sure. Nada inverted or not. I'm just getting back to this project after a number of months, so I'm sort of starting all over again. Just got everything pulled out of the motorhome so I can start digging a liitle deeper. IF memory serves.... the URI acts like it's loading the circuit. When not connected to the URI, the aux output on the Kenwood switches with received signal from 0 to 5 V or 5 V to 0 depending on how it's programmed. I'll try your suggestion of applying +5 vdc or ground to the URI...

Doug: No indication of change while monitoring the asterisk client. Checked to make sure I was set for repeater operation in the config files and all was well there too.

David: This is the same issue you tried to help me with several months ago but I still couldn't get things going before I hit the road for the winter - even with all of the great info you provided. I reviewed your notes again before tackling it again -- including checking all my wiring for the umpteenth time. Just wasn't sure if there might be some difference between your V2's and my V1. I'm just grasping for straws at this point.

Got everything off the shelves and spread out now so let the troubleshooting begin....

John

On Sat, May 9, 2015 at 1:24 PM, Doug Crompton <doug@crompton.com> wrote:

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

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