atcomsystems.ca/forum Forums Other TDM Phone Systems 1A2 and Comkey Telephones & Systems 1A2 and some old WECO stuff

"Intrestingly, wiring diagram on triple Amp cords are kept consistent with standard 5-line models. So what I need is just to connect the Amp #1 of Call Director to my regular 5-line 1A2 plug and the first key strip works + ringer, etc. work perfectly fine."

That was the whole idea with 1A2 - consistency and the ability to upgrade. You had 5 line phones and business got better- runs another cable and change to the next model.

When the K-10 (830?) model was introduced you could upgrade from a 5 line to a 9 line with minimal wiring changes. Unplug the 564 and plug in in the 9 line and it worked! Of course your intercom was now on line 5 and not on line 9, but that was incidental, Move the intercom, remove the A1 leads from lines 2-4 and you were in business to add more lines. Buzzer and ringer leads stayed the same.

Sam

During my brief career at New York Telephone in 1967, I worked with an installer who had many years of service. He was always being asked to work overtime but would inquire if call director work was involved. If it was,he refused. He explained that between pulling 75 (or 150)pair cable through underfloor ducts,and terminating thousands of pairs, it wasn’t
worth the headache. This was lower Manhattan, some jobs could be for over a hundred sets.

I would agree. I just thought about drilling the holes in the floors and walls for standard 25-pair cabling which is not thin. But for connecting the Call Director outside of the room where the key system is located in the basement, I would need to drill holes where can bring a hand through.

Several years ago, the grandson of the late Phyllis Diller posted a picture of the telecom backboard in his grandmother's house here on Sundance.

There were a few 25 pair cables visible. The 1A2 was eventually replaced with an Avaya Partner ACS, but, the existing cables were reused.

Here is the link

Click Me...it's okay...trust me.

Survey said....."Bzzzz"!

Here is the topic that I had in mind.
Sorry Professor!

Well... I don’t think I would ever get so famous as Phyllis Diller and I’m not sure I would survive till my 95yo, but I can’t imagine what may happen to a 1A2 system even after 40+ years of service, except the direct nuclear bomb explosion nearby.

My system at home is 38 years old. I've had to replace one or two tone dials and a few lamps. I've also replaced a few sets (some of which were used when I installed them) - sometimes because I wanted another look and sometimes because something legitimately broke.

But overall - it just runs and runs and runs...

Sam

Sam,

I assume with TT dials - those just drifted out of proper food frequency tune. I never had it on 2565/2564 sets, but very often on Princess dials. In this case I re-tune the coils with frequency meter which takes 5 minutes. Never had really “dead” TT dial.

Lamps is a kind of obvious consumable, so I have some stock of 100+ 51A lamps in case the next 50 years I have some of those burnt out.