sundance-communications.com/forum Forums Other TDM Phone Systems 1A2 and Comkey Telephones & Systems 4A Speakerphone

Is there a terminations list for this speakerphone system?

I'm having issues with getting it to work.

All the terminations are plug-ended, if the system is used with a x565HK tel set or a ComKey 416 set.

If used with a single-line set or some other key set, there is an adapter cord with spade lugs. Also, a 223A adapter.

Which model telephone are you using with it?

You need to read BSP 512-700-100. Click this:

4A BSP

Thanks Arthur!! That's a great source!

We are using this with a 2830 phone set. The current wiring is without the connecting block. We are connecting the 108, 680 and 85B1 directly to the M16 cable. This configuration was used for decades.

This system is wired for the purpose of a Live TV Talk show. We are taking audio from the speaker set and feeding that to a Mixer in the TV Master Control room.

I swapped a known good speaker from another studio, and tightened the power supply terminals. I measured the voltage to be about 22.5Vac at the terminals and at the connector pins 10 and 36.

Now, I'm able to hear the caller at the speaker, but the caller cannot hear me. Also, the 680 connects/disconnects calls and controls volume of the speaker.

Any suggestions? I have extra 680s.

Nice to see another northeast Ohio guy. I did a bunch of work with the radio station at school in Toledo.

Using Figure 2 from document 512-740-470, I rang out the system to the schematic, found a couple loose screws and it has come back to life!

Thanks for this resource!!