Adding extra speaker & microphone connection PM1500

[firebug24]

Hello all

I installed a PM1500 in a fire engine and need to add extra speaker & mic connections at the pump panel.
Any help is appreciated !!
thanks
steve w

[Jim202]

Hello all

I installed a PM1500 in a fire engine and need to add extra speaker & mic connections at the pump panel.
Any help is appreciated !!
thanks
steve w

The radio has the ability to have an aux mic input and the PTT lines on the DB25 accessory connector, along with a ground wire.

Depending on the mic you use, there is a gain adjustment in the software just for the aux mic.

I don't have the service manual in front of me, but I also think there is a speaker connection also available on the DB25 accessory connector. Just make sure that you don't ground either side of the speaker wires.

Jim

[firebug24]

Anyone know what the pinout would be on a CDM1250 mic to match the DB25 inputs ? I'm going to use 8 pin speaker mics (motorola CDM type) but dont have any ideas which mic wires shoud be connected .
HELP please
steve w

[Jim202]

Anyone know what the pinout would be on a CDM1250 mic to match the DB25 inputs ? I'm going to use 8 pin speaker mics (motorola CDM type) but dont have any ideas which mic wires shoud be connected .
HELP please
steve w

Now your really confusing the rest of us. The CDM mobiles don't use a speaker mic. They use a normal hand mic with a modular plug like an 8 pin RJ11 type connector. Either that or you have me confused in what your trying to describe.

If you PM or email me your email address, I can send you a PDF of the mic connections.

Jim

[firebug24]

Sorry Guys

J11 plug handmic is what I was referring to. Anyways, According to the DB25 pinout on the PM1500 radio I need to connect the handmic to this DB25. I need to know which handmic pins go to which DB25 connector. I have 4 fire engines that want speakers & mics at the pump panel. Also, Would cat5 or cat6 wire work well with this advanture ?
thanks
steve w

[firebug24]

Hello

Would anyone have RJ45 pinout to DB25 connector for this setup ?
thanks
steve w

[thebigphish]

clicky