I'm planning the same thing Monty. I just removed the transmitter and receiver from the RC210 and put them directly on the node. I still have the other node connected to the RC210 for channel steering. It looks like the parallel GPIO's would be active high so I need to reprogram my radio. I'll let you know if I get there before you do. 73 de K0JSC Jeff ________________________________ From: app_rpt-users-bounces@ohnosec.org [mailto:app_rpt-users-bounces@ohnosec.org] On Behalf Of Monty Sent: Tuesday, July 03, 2012 4:06 PM To: app_rpt-users@ohnosec.org Subject: [App_rpt-users] CDM/GM300 as Remote Base Hello Everyone, Has anyone used a Motorola CDM or GM300 as a remote base and used the GPIOs to control which channel? Monty