[SML] Making a phone ring and it's handset speaker work on stage

[Johnson, Philip]

We’re doing a show with a phone that needs to ring on stage.  I have an old Tele-Q box that works so I can make the ringer work.  Now the director would like to have audio from one of the other characters coming through the handset speaker.   I have a pretty good idea of how to make this work but I have a couple of questions of the hive mind to see if I have all bases covered. If there is a device for doing this that would be the best solution.

4 wire phone cord.
Red and Green to the phone to make the bell ring etc.
I’m planning on using the black and yellow wires to run audio to the speaker and reconfiguring the phone so the handset speaker isolated to those wires only.

Does this sound like a good plan?
Tele-Q will only be used to make it ring, when handset is pick up it stops the flow to the ringer.
Isolating the handset to the other lines should keep the tele-Q and audio system separated
Do I have a danger of the 90vac from the tele-Q and the audio signal running along the 4 conductor phone line ?

The Audio will be a wireless mic on the actor (switchboard operator)
Wireless connected to audio console and system.
Amp output of appropriate size and settings running a line to the phone handset.
Running both signals through 4 conductor phone wire

I’ve run audio to speaker phones before but that was always through a separate line.  Should I run a separate line for audio so the phone ring and audio don’t interfere with each other.
I’m also concerned 90v would do bad things to the audio console so I may run a separate system just to feed the handset.
This effect is only a couple of minutes long so it’s a lot of work to make it practical.

Thanks for your advice



Philip  Johnson
Lighting Designer/Technical Director
Department of Theatre and Dance
Texas A&M University – Corpus Christi

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