atcomsystems.ca/forum Forums Other TDM Phone Systems 1A2 and Comkey Telephones & Systems 416 KTU

I have a 416A KTU that I just purchased. I thought it was an automatic ringdown circuit but after reading the instructions I'm not so sure. They also said it had to be used with a K259B or K359A Panel. Does this mean I can't use it with my 551 or ITT611 KSUs? Can anyone out there tell me what this is actually used for and if it will work in a 551 or ITT611 KSU?

This post should be moved to 1A2.

Real quickly though.

It is a semiautomatic ringdown card. Only 1 required per circuit. Automatic at the distant end, manual at the local side.

It's a 20 pin card, so you need a 259 or 359 panel. I don't think the WE 551 or the ITT 601 has 20 pin slots. (I don't know what a 611 is)

Sam

Thanks, I'll tell you what a 611 is if you tell me what a 259 or 359 panel is.

A 259 is a 2 position 20 pin panel. A 359 is a single position 20 pin panel (unless I have them reversed). They are unwired and were designed to allow you to add an extra card or two to a system that was maxed out. Or to add a 20 pin card(s) to a system that only had 18 pin slots.

As I recall you wirewrapped on the leads you needed to the appropriate pins.

The 461 card was designed to work from a Key system to a single line phone. So it was Manual on the KSU side and automatic on the SL side. The assumption being that you would not have any equipment out at the remote location.

I think I used one once, going out to a guard shack. Later on we used SanBar 4415s (auto both ways) if we had SL sets at one or both ends of the circuit. I believe the 461 offered a longer distance then the SanBar, but I never personally ran into that problem.

Sam

You do mean a 416 card, not a 461, don't you? So are the 259 and 359 panels something you can add-on to a 551 KSU? By the way the ITT 611 KSU is a KSU similar to the 551 but with intercom capabilities. Some of the other moderators can point out other differences but that is it in a nutshell.

Bill, I think you mean an ITT 601. There was never a 611. It had five line card slots, an intercom slot, a MOH slot and a solid-state interrupter card at the top with a white plastic chassis and light gray cover, correct?

You can add 259A or 359A panels with no problem except that they are designed for rack mounting. You really can't use them any other way since the cards plug into the front face of the mount and the back face contains the screw terminals for pin slots 1-20.

There are no limits to what you can do with 1A2; there is no software that calls the shots. It's all up to your imagination and the hardware you have to work with. Unlike electronic or digital systems, the installer determines how intelligent the system will be when it is installed.

I'm pretty sure that there was a 416 and 461 card too. Oddly, they were similar in function. I believe that the 416A allowed tie lines between two systems, where the 461 allowed for an off-premise single line set to have full functionality as a single line key set. Again, these are what I believe to be the functions, as in guesses.

Bill -

What Ed said. Yea, and now that he mentions it, it was screw terminals, not wirewrap on the 259/359 adaptor shelves.

I believe I may have dyslexified the 416/461. I'll check it out in the dreaded basement when I go home.

Are you just messing around or are you looking at a particular application for a ringdown circuit?

Sam

Yes, I was dyslexic.

The 416 card is the combo tie line card - Only 1 card needed. Manual from the key system side, Automatic from the distant end. A 20 Pin Card. (Special Apparatus mounting needed)

The 461 card is also a tie line card, but it is an 18 pin version of the 414. (A 20 Pin manual tie line card, one card needed at each end).

Any questions? I have full specs on all these cards.

Sam

I seem to remember the 416 was an automatic ringdown card; as opposed to the 415 manual ringdown card. And yes, 259 adapters were the way to go. But I worked for a guy then who wanted you to unwrap and then re wire wrap a spare slot in the ksu. Had to do that for 403a MOH cards a lot.

Oldtime-

The 414 was the fully manual one. The 415 was fully automatic (DC signalling). When your circuit would get switched out (usually over the weekend and always without notice) from copper to carrier the 415 would no longer work (later there was a mod for it). The 416 was half and half - one way automatic, one way manual.

I remember unwrapping and rewrapping card slots. A PITA. But if you were installing 414 or 416 cards you needed the 259 because the cards were 20 pins. I think it was Sanbar (but I could be mistaken) who made 584 panels where the last slot or two in each 13 line panel was 20 pins. Or maybe they had panels that were all 20 pin slots. I really don't remember anymore.


Sam