atcomsystems.ca/forum Forums Other TDM Phone Systems 1A2 and Comkey Telephones & Systems 1a2 system

Hello 1A2 Fans! I have a question that perhaps one of you may be able to answer - actually it's sort of a puzzle......

I have an older ITT 1A2 system at my "home" (not too hard to figure it out from my screen name - and no, there is no missile). I have 4 lines on the KSU. One of them is a dedicated FAX. Someone (usually me) likes to pick up the phone and accidentally punches the line 4 button while sending/receiving FAX's because the "in use" light isn't lit when the FAX is in operation.

About 6 months ago, I saw on EBay what I remember to be an "opto-isolator" specifically designed to turn on the "in use" light when a FAX (or other non-1A2 device)is using the line. Unfortunately, I only saw this device after the auction had closed, and now the auction has been deleted. I had the part number of the device (made by ITT?????), but lost the paper on which it was written. Now I don't remember the part manufacturer or the number, and I can't find ANY references to an "opto-isolator" for a 1A2 anywhere. I would dearly love to own one of these, but they are hard to buy when you don't know what it is that you are looking for! LOL

Anyone? This is driving me crazy, especially since I DID write down the information, but lost it. UGHHHHHHHH

I don't know of anything that will give you A lead control. I did a search on google and didn't find anything for A lead control. Didn't find anything on Sandman's WEB site either. You will need something that has contacts that close when an off hook is detected to control the A lead. Maybe one of the other "older" techs can help ya.

*sigh* Yes I'm ashamed to admit it but yes I can tell you they do exist. I even have a couple of them around here. It's a "A-A1 Light Control Model TA-1" Made by TT Systems Corp; 7 Odell Plaza, Yonkers NY 10701. And yes I AM younger than EV :>)

Found it on Sandman's WEB site too. after much searching. It's a WTB-860617-40 High sensitivity relay. It's on Sandman's site here https://www.sandman.com/wizard.html#Latching%20Relay
I must not be old enough to know about these things...so too my elders. :bang:

HEY! I can still see 30's from where I'm standing! *I knew I shouldn't have answered that post* :bang:

So can I, there back there somewhere. :toast:

Yes but can you remember them? :sleep:

:nono:

I think I just found my new "best friends" guys.......LOL. Mr. MacGyver hit it on the head. Yes, the high sensitivity relay offered by Sandman would work, but it's not opto-isolated. Interestingly enough, I spoke with someone at Sandman, and they said they had "nothing" that would work on a 1A2 for A lead control......

The TA-1 is EXACLT what I want/saw. Now I need to find 6-8 of them. Mr. MacGyver, would you consider "parting" with a few, or would you know where I can get them?

You guys are GREAT!!!! Thank you so much. Perhaps I can sleep tonight (grin).

There is much I want to tell/ask regarding my 1A2 (which I obviously LOVE - for reasons I will be happy to tell those "unenlightened individuals" unfamiliar with lightenig strikes on phone lines in rural country, and the damage it can do to expensive solid state PBX's).

One of the things I have always wanted to do was put a "front gate control" on the KSU, operated by the DTMF decoder on the intercom line. Perhaps I will post a seperate quetion on this topic. I also have a need to extend the KSU to phones connected over a 1,000 foot range. I don't know how to do this. Perhaps one of you fellow 1A2 "Guru's" (you're new moniker) can tell me how to do this.

I'm SO ashamed :scratch: