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Motorola Desk Mic Connection to XTL2500 Accessory Connector

Bick

Newbie
Premium Subscriber
Joined
Jan 17, 2004
Messages
3
Location
Madera, CA
I am trying to hook up a Motorola desk mic (RMN5070A) to the rear accessory connector of a dash mount XTL2500. I have determined the pin locations for GROUND (pin 14), AUX PTT (pin 16), and AUX MIC (pin 23).

On the desk mic connector itself, I have PTT on pin 2, GROUND on pin 5, and MIC_ HI on pin 7.

What I am trying to determine is where on the accessory connector do I connect HUB/KEYFAIL (mic connector pin 9) and GPIO (mic connector pin 10).

NOTE: I do not plan on using the HUB feature.

Thanks for any help,
Gray WA6BJY
 

littona

Super Freq
Premium Subscriber
Joined
Nov 12, 2006
Messages
59
Location
Council Bluffs, IA
Can't say I've tried to do exactly what you're doing, but I have a document that shows how to interface a radio over IP device to an XTL2500 accessory port. Maybe it'll help some? Here are the pins they used:
20 - SPKR+
26 - SPKR -
13 - Chan Act (COR)
25 - Ignition Sense (+12V DC)
23 - Mic HI
16 - PTT
15 - Emergency
21 - RX Filtered Audio
14 - Ground
 

Bick

Newbie
Premium Subscriber
Joined
Jan 17, 2004
Messages
3
Location
Madera, CA
Sounds similar to what I have been able to find using a number of Motorola pubs, also. I think I am going to have to rethink my project but it will not be as pretty as my original plans.
Thanks for your response.
Gray
 
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