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#548719 03/28/13 02:05 PM
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I have an 1a2 system with a 10 button set and a 5 button set. The wiring closet was dismantled by mistake and now the 2 phones have lines that work but the button for the buzzer does not work.
I can I go about rewiring these so the buzzers work

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Take the voltage output for your buzzer, which is probably either 10 volts or 18 volts connect it to one side of your buzzer lead of the set you want to buzz take the A lead of the button from set you want to do the signaling and run it to the other side of the buzzer to complete the battery to ground connection which will buzz the buzzer. I'm assuming the button is already set to non locking as you indicate the buzzers were set up before.

This is from and old memory, but I'm pretty sure this will make them work. Best way to do them is one at a time so you don't get confused in your wiring.


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Mike M:

Do you know the color code for the 6- and 10-button phones? Do you have the BSP (or other mfg practice) handy?

Do you know what an A-lead is?

If you can tell us what buttons were in use at the time they were "un-wired", we can direct you immediately to the correct colors and get the customer buzzing again.

Also, take the covers off the phones and tell what leads are feeding the buzzers. (Probably Y/Bl or Y/Or or Y/Gr pairs.)


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Art,
Question. Didn't the 10 button sets bunch the A1's in the set leaving the wires going back to the 66 block unused.

Thanks


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@John

No. The A-leads were folded into the spare pairs. In a 1a2, the leads were T,R,A,A1,LG,L...using 3 pairs per line. Those took the first 15 pairs of a 5 line set. Pairs 17 and 20 were used for the buzzer and ringer and the rest of the pairs may not even have been used. In fact, early Stromberg sets didn't have a 25 pair base cord.

In a 9-line set, lines 6-9 T,R,LG and L, were terminated on pairs 16&18,19&21,22&24, and 25&23! The A leads got folded in to pairs 5,8,11,and 14 as A2,A9 A3,A8, A4,A7, and A5,A6, leaving only the tip of pair 2 as the common A lead ground. It still kept 17 and 20 free for bells and buzzers.

When we ran jumpers, it was not uncommon to see the Orange wire hanging free in the frame on 3-pair jumper (geeze I still have a spool on the shelf) or we could cheat and run T,R,A and L in two-pair jumpers. Mostly, we cheated only on tie cables.






Carl

Last edited by Carl Navarro; 03/29/13 09:04 AM.
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On WECO sets weren't some of the violets used for speakerphone?


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Carl,

You are on the $.

We used to wrap the O/W wire around the x-connect for 2-3 turns just to keep it neat. At one point someone came out with a 2.5 pair spool of jumper wire but it never took off.

Until.......

In the dot-com boom at the turn of the century I was doing a LOT of transmission work. It seems every candy store and mom-and-pop needed bandwidth and we were running T-1s and T-3s in everywhere.

A T-3 mux took 2 coaxes coming in with the feed and 2 pair shielded coming out for the individual T-1s. We would usually put in two digital patch panels (one for the feed from the mux and one for the station cables going to the customer) and then cross connect in between them.

At some point that 2.5 pair x-connect wire started showing up. 1 pair transmit, 1 pair receive and 1/2 pair for the shield. Everyone else just assumed it was specially made for the new industry, but us cranky old guys knew.

When the 2.5 was back ordered they used to send us 3 pair and the new guys were all impressed how the old folks got it looking good by wrapping the extra half pair.

Sam

Last edited by Silversam; 03/29/13 10:07 AM.

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That little section of orange wire wrapped around the other 5 leads made the job look really neat. New guys in the gang (and the occasional customer looking over our shoulder) would ask us why we wrapped the orange around the others. The answer was "It reduces sub-harmonic marzel-vane fumbling."


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Arthur, quit messing around with the turbo encabulator!!


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In the old days, when we had trouble on just about anything and it mysteriously came clear, we would tell the boss the TDK bit was stuck. He never asked what that was, but we all new it was "Tech Doesn't Know"


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