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Joined: Jul 2005
Posts: 1,184
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Joined: Jul 2005
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Visit Atcom to get started with your new business VoIP phone system ASAP
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Joined: Aug 2006
Posts: 1,812 Likes: 15
Moderator-Iwatsu
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Moderator-Iwatsu
Joined: Aug 2006
Posts: 1,812 Likes: 15 |
Your pics bring back memories. Nearly all bad, but memories none the less...
Sometimes the thoughts in my head get so bored, they go for a stroll through my mouth. This is rarely a good thing.
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Joined: Dec 2004
Posts: 5,722
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Joined: Dec 2004
Posts: 5,722 |
WECO 584 panel (?) this could do 12/13 CO lines. ITT had a similar unit --- 512. Know where a 512 is still hanging on a wall --- are you opening a museum? 
Ken
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Joined: Apr 2004
Posts: 4,991
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Joined: Apr 2004
Posts: 4,991 |
Is it 1949 again ?
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Joined: Jul 2005
Posts: 1,184
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I want to hook it up and get it going with some sets I have been collecting. I figured I would use it as a learning tool, trying to be more educated like you wise ones that started with 1A2! ![[Linked Image from smilies.sofrayt.com]](https://smilies.sofrayt.com/fsc/bow.gif)
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Joined: Jan 2005
Posts: 15,397 Likes: 18
Moderator-Vertical, Vodavi, 1A2, Outside Wire
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Moderator-Vertical, Vodavi, 1A2, Outside Wire
Joined: Jan 2005
Posts: 15,397 Likes: 18 |
It's defintely Northrn Electric equipment (Northern Telecom's prior name before becoming Nortel). I remember it well. Never cared for their power supplies (upper right). Not enclosed well enough to protect from the occasional piece of scrap wire from going into places where it shouldn't.
To the left of that is the ring generator (the brass-colored box). Below the power supply is a standard interrupter (clear plastic cover to the right). The card in the slot to the left of it is unknown, but due to it's proximity, I will guess that it's a fuse card. Most larger systems had plenty of fuses to help isolating troubles. They also reduced the fire risk, since 10 volts at 10 amps on a dead short in telephone wire CAN cause a fire. Lamp circuits were usually broken down to multiple 1 1/3 amp circuits to reduce this risk. ITT 512 and ITT/WE 584 panels had all of the fusing on the back side of the panel themselves.
The cards to the lower left are typical 400-type KTU's (line cards). I don't know what the card is that is in the far-right slot. Perhaps some type of intercom card. Looks as if this is just a simple 13-slot rack, like a 584 panel.
Whats so amusing about this is that it's chock full of 66 blocks, the very ones so detested by our friends to the North.
I am guessing that this system is early to mid 1970's vintage, possibly even late 1970's. Hope you don't bust a gut trying to hang that thing on the wall!
Ed Vaughn, MBSWWYPBX
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Joined: Dec 2002
Posts: 9,429 Likes: 3
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Joined: Dec 2002
Posts: 9,429 Likes: 3 |
Hey Ed, what is the interrupter for?
Jeff Moss
Moss Communications
Computer Repair-Networking-Cabling
MBSWWYPBX, JGAE
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Joined: Dec 2004
Posts: 5,722
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Joined: Dec 2004
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It makes the "clickety clack" sound while you sit on hold --- the forerunner of MOH !!! :rofl:
Okay, Jeff, I'm not Ed but the interrupter interrupts the battery via multiple contacts to flash/blink lights, ring cycles, and make that "clickety clack" noise. It is a DC motor with multiple cam lobes that make and break the connections of battery by opening and closing contacts. Mechanical "on-off" switch.
Hope that helps. :thumb:
Ken
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Joined: Jan 2005
Posts: 15,397 Likes: 18
Moderator-Vertical, Vodavi, 1A2, Outside Wire
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Moderator-Vertical, Vodavi, 1A2, Outside Wire
Joined: Jan 2005
Posts: 15,397 Likes: 18 |
What Ken said, except that they had them with 10 VAC motors and 24 VDC. I Don't quite know why they had different voltages, but they were out there. I have never encoundered a DC unit myself.
The contact outputs were:
LF (lamp flash) for incoming calls at 60 IPM;
LW (lamp wink) for calls on hold at 120 IPM;
RN (ringing) for locally-generated ringing to sets at 2 sec. on and 4 sec. off.
There were multiple sets of contacts on different circuits to minimize contact pitting.
What Ken said is another thing about 1A2. If the ground wasn't really good enough on systems using 400D line cards, you heard a repeated clicking during the silence while on hold that tracked the LF cadence. I don't think this was intentional.
Ed Vaughn, MBSWWYPBX
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Joined: May 2002
Posts: 17,742 Likes: 36
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Joined: May 2002
Posts: 17,742 Likes: 36 |
I married an interrupter. Sorry dear, yes dear your right, I'll delete it. OK she's gone. :toast: Good explanation Ken.
Retired phone dude
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