Phone patch

[tvining]

I have a Motorola ASTRO mobile mounted at work. I would like to make a simple phone patch, one way.

I want to call a phone number, system picks up and keys radio, make an announcement, and hang up. Once the phone is disconnected, I want the radio to unkey.

ie:
RING
interface answers, keys radio
interface broadcasts any sounds coming across line
(end of message, system hangs up) interface unkeys radio, disconnects.

(Might be after 3 seconds of silence it disconnects)

Is there such an animal?

[d119]

Sounds like an old Dial Access Paging Terminal (DAPT) of Zetron fame would do what you want pretty easily considering you only want one-way communications.

[tvining]

Thanks for the advice. I could use a cheaper solution, since I don't have multiple pagers, only a single need to key the radio.

[d119]

A used DAPT on eBay (and they do show up often) shouldn't run you that much... And it's certainly less of a headache than engineering something else.