Batboard

Can someone help with a wiring diagram from a AARMN4026B backlit enhanced mic to a CDM1550's accessory port?

I currently have a non-backlit mic hooked up through the accessory port and it is working fine but when I plug the backlit mic in, the lights nor keypad work.

Any help appreciated. -CHRIS

Chy1723 wrote:Can someone help with a wiring diagram from a AARMN4026B backlit enhanced mic to a CDM1550's accessory port?

I currently have a non-backlit mic hooked up through the accessory port and it is working fine but when I plug the backlit mic in, the lights nor keypad work.

Any help appreciated. -CHRIS

Here's the situation:

The AARMN4025 mic uses pins 1 through 8 of the mic connector but it is in a 10 pin mic connector. The 4025's have the 10 pin RJ50, but pins 9 and 10 are not used.

Pin 9 is External Keypad Row and Pin 10 is External Keypad Column. The 4026's have wiring into 9 & 10 which enables DTMF.

The 4025's (and others) work well through the Accessory Connector because all of the standard mic lines are available there. However, what's not available as far as I can tell, is the External Keypad Row and Column lines. I just poured over the Accessory Connector pin outs and the choices for the programmable pins in the CPS. I don't see the Keypad lines anywhere.

So even if you've got your accessory connector hooked to an RJ50 for your mic, the Keypad lines aren't there to be utilized. They're only available at the front mic connector.