atcomsystems.ca/forum Forums Other TDM Phone Systems 1A2 and Comkey Telephones & Systems 760 speaker

Yes, I was going to add that I did not see the 694 speaker as part of that setup. All the speakers looked the E1 ringer with the ubiquitous gray 4 conductor wire stapled to the walls.

I know this may seem after the fact but I just discovered that the 106 control unit referenced above has a little trap door on the bottom. The hook-up is with what looks like the serial port computer connections. Never seen any telephone device use anything like this. Any thoughts?

The 106 is a control unit from the AT&T "Quorum" Conference Room Speakerphone system.

Thanks, Arthur, I wondered whether it had something to do with that although I have never personally seen one. Somewhat related to speakerphones, I wondered if anyone could help me with a supply source for the 95B1 transformer for the 4A speakerphone power supply? I have the transformers, I just need the connector that plugs into the amphenol connector. It looks like a mini-amphenol connector and plugs in with the mini-plugs with the speaker and transmitter.

The transformers are a piece of cake, but the connector cable is a different story. I'm almost positive that you can send the AC power in via spare leads in the 223 type cord. I know that you can do this when using an 82B/C adapter. Which one of these are you using for your 4A?

I don't have an 82 here in front of me, but I think Ed is correct that you can probably feed the AC into a couple of screws in the 82 adapter.

I can't edit my post, so here's an update.

I have here a Precision Components 82C adapter. It has two screw terminals marked "AC."

I presume that those are paralleled with the small Amphenol plug, so you could use either way to feed the AC into the system.

Also, I think you need an 85, not a 95 transformer.

You are correct. There are all kinds of ways to feed power to those things! I was always a fan of simply sending them power from the KSU over a spare pair and avoiding the transformers altogether. So many service calls for unplugged transformers or a broken wire on one of the terminals.

You were not supposed to use grounded power (such as provided by a KSU) for the 3-type speakerphones. It made them do flaky stuff, I seem to recall.

Okay, thanks for the update but it did not work and I'm not sure why. I have several 2565s with a 4A speakerphone attached via the 82 connecting block and yes, I do run the two wires from the transformer (BTW, what is the difference between the 85 and 95 transformer?) to the AC screws in the 82 and it works fine. The problem I am having involves a 2500S single line phone with a cord that has the patterned? Amphenol connecting plug, so all the components have to plug into this plug. I cannot plug it into the 82 because both the phone and 82 are male. Any other ideas?