sundance-communications.com/forum Forums Other TDM Phone Systems 1A2 and Comkey Telephones & Systems 30AM Apparatus Unit Schematic

I got the 416 BIS unit operating, tho I had to find a 20v DC power unit to help that situation.. Now I have 3 lines but only 1 master unit. My question is, can I use the 30AM Apparatus Unit to run the third line on the Personal Line button and then bridge that line across to the rest of the phones?? If so, does anyone have a link or a PDF of the wiring schematic for it?? Or is it absolutely necessary to find a second master unit and reconfig it for lines 3 & 4?? I appreciate the previous advice regarding the speakerphone.. It was most helpful. :-)

This unit puts out the standard T, R, A, L and grounds, just like any other line appearance. If you want, you can cross-connect these outputs to the red/orange, red/green and red/brown pairs to put it on line three of the station cables (just like 1A2). I don't think that the 30AM is designed to carry much in the way of station load, but a few sets should be OK.

Thanks for the start, Ed.. My problem is that I don't have a schematic for the unit and don't know what wires go where on the thirty terminals. On top of this I'm a lot color-blind. Plus. What powers the unit? It has a jack to plug in the single-line into it for T & R but beyond that I'm clueless what wire goes where from there. Also... Will it Ring on the ComKeys?

I used an old Dell Laptop Charger to run the BIS on this ComKey Unit. Works Surprisingly well considering it's the first time I've ever plugged this phone in since I got it over 10 years ago. Privacy Modules work well too. Roommate yelled up the stairs cause he couldn't get a dial-tone on Line 1, not realizing I was on it. :-)

The 66 block inside the unit is just multiple appearances of the same three pairs so that the fifth line can be distributed to multiple phones. They are five vertical columns of three pairs. You just need to wire it so that the red/orange pair is first, the red/green is the second pair and the red/brown is the third below them.

If I recall correctly, these operate on a separate AC power input of 15-18 volts AC. I can't remember where the terminals are on the unit, but they are fairly well marked (AC1 and AC2?).

Yes, the line will ring and you can use the switch for line 3 between the DSS buttons to turn it on or off.

Thank you, Ed.

This makes perfect sense.

I've located the power terminals. Actually wire still attached, and I have the power unit in the back room somewhere.

Excellent.. Thank you!!!

Barry, before you start connecting things, you need to read BSP 518-450-106, preferably Issue 3. It's not a straight-forward 3-pair configuration. The connections go from the bottom up, not the top down.

The 30AM Apparatus Unit uses the following connections when wired in the standard method, where the "Personal Line" appears on the 5th pick-up key of one or more sets.

The 66-type block has the following designations, starting at the top:

(Columns 1-4)

CA (Common Audible)

COM (Common)

LP (Lamp)

A (A-lead)

R (Ring)

T (Tip)

(Column 5) [not labeled as column 5]

AC (power)

AC (power)

M (MOH)

M (MOH)

- (spare)

- (spare)

The CO T & R comes in on an RJ-11 jack.

The way to install it is as follows:

3-pair inside wire from the 66 block to an 8p8c jack near the telephone set. 8-conductor cord (WE # D8W-type, similar to a Merlin line cord) from the jack to the internal 8p8c jack inside the set. That jack is wired with a harness that terminates in a 6-conductor plug that plugs into the Personal Line jack in the "interconnect field."

If you don't have the 6-conductor plug, you can make one from the plug that is on the end of the dial or other components in a spare set. (I can provide one for you.)

The above will allow the personal line to ring on the CA bus in the set. You will have no way to turn it on/off manually. It can be permanently turned off simply by not connecting the CA lead at the 30AM unit.

To get the personal line to work on, let's say, the 3rd pick-up, you need to identify the T, R, LP, A and CA for that button. You also need to tie the COM of the 30AM to the COM of the telset.

For the 3rd button, here are the colors:

T = Red-Orange
R = Orange-Red
A = Red-Green
CA = Green-Red
LP = Red-Brown

COM = Slate-Yellow

Thanx. :-)

CA Issue.. No Ringing... Searching for a butset to diagnose.

Will post more soon.

You're welcome.

Make sure you didn't accidentally reverse the third pair (CA and COM) going to the 25-pair cable. Also make sure that the 25-pair cable itself is punched down accurately. (No reversals)