Telephone to FM

[tvining]

I am looking for a device (homemade, commercial, whatever) that will, when a phone rings, answer the phone, Key up the radio, broadcast whatever comes across the phone over the radio, and after 3 seconds of silence hang up the phone line.

Target radio is a Motorola Astro VHF radio.

Use is this:
Mass notification and warning. I have a priority net on all my radios and whenever I send a message via mass notification and warning system (Text to speech) I want to call an extension that will send the message over the priority net.
When the Smelly matter hits the oscillator, I have to make phone calls, MNWS announcements, etc. Automating this as much as possible will be required- and the radio is the weak link at this point, but I'm sure someone has this out there.

TV

 

[lbfd09]

I would be very careful about this. I know many services within the spectrum require a "control operator" of some kind. To have the phone answer automatically is very dangerous as it will allow any called intended or accidental to be talking over your designated frequency. You or the licensee is responsible for those who talk on the frequency under your license.

If there is some way to prohibit or restrict the outside world from this number you might be alright.

 

[nd5y]

What you need is a phone patch.
They can probably be configured to answer the phone line in different ways such as after a certain number of rings or only connect to the radio after the phone user enters a DTMF code. I don't know about hanging up after a period of time with no audio. I have never heard anybody do that.

Here are some companies that make them:
Zetron - Mission-Critical Communication Systems
Telephone Interconnects - Phone Patch
Untitled Document

You didn't state what radio service you are using. It might not even be legal for you to use a phone patch.

 

[kk6dj]

This is probably close.

Viking CPA-7B

Viking Electronics Telecom & Security Products

 

[mformby]

Zetron

The Zetron Model 35A should do what you want to do. You will need a radio(s) with DTMF so you can maintain supervisory control to meet FCC requirements. It is fully programmable, and Zetron makes high quality equipment that will be trouble free for many years to come.

I am looking for a device (homemade, commercial, whatever) that will, when a phone rings, answer the phone, Key up the radio, broadcast whatever comes across the phone over the radio, and after 3 seconds of silence hang up the phone line.

Target radio is a Motorola Astro VHF radio.

Use is this:
Mass notification and warning. I have a priority net on all my radios and whenever I send a message via mass notification and warning system (Text to speech) I want to call an extension that will send the message over the priority net.
When the Smelly matter hits the oscillator, I have to make phone calls, MNWS announcements, etc. Automating this as much as possible will be required- and the radio is the weak link at this point, but I'm sure someone has this out there.

TV

 

[mkewman]

there are several devices in the broadcast arena that would serve this purpose.

here is one: Broadcast Tools DC8 Plus

Several Custom programmable relays (for Transmit, stop transmit functions for instance) and a phone hybrid (for providing announcement audio)

all of course available for use after you enter your custom (up to 8 digit) passcode.