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Cleaned up the phone room in my buddy's building today and removed this. Not too sure what its purpose was - 5 CO lines and 5 relays. Any ideas? There was no KTU equipment or anything. ![[Linked Image from i1246.photobucket.com]](https://i1246.photobucket.com/albums/gg619/jefflocks/69E272AF-8C91-401C-A4F8-E05D32F66DA6_zpskufdpq3s.jpg) ![[Linked Image from i1246.photobucket.com]](https://i1246.photobucket.com/albums/gg619/jefflocks/A8681655-401C-4FB4-84EC-729321677356_zpseu9gfybj.jpg)
Jeff Moss
Moss Communications
Computer Repair-Networking-Cabling
MBSWWYPBX, JGAE
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Visit Atcom to get started with your new business VoIP phone system ASAP
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Joined: Apr 2004
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Was something from an old Horizon dates are 1974
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Joined: Dec 2002
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Interesting, the building was not built until the early 80s.
Jeff Moss
Moss Communications
Computer Repair-Networking-Cabling
MBSWWYPBX, JGAE
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Joined: Dec 2005
Posts: 9,178 Likes: 8
Spam Hunter
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Spam Hunter
Joined: Dec 2005
Posts: 9,178 Likes: 8 |
Whirlwind??? Does he work with Pro Audio equipment 
I Love FEATURE 00
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Joined: May 2002
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I was thinking Horizon also, but not sure. The relays were for straight line sets, otherwise you had to rewire the sets and put a diode in them, it took one per SLT. I don't remember the wiring scheme.
Retired phone dude
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Joined: Dec 2002
Posts: 9,428 Likes: 1
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Dex, the Whirlwind stickers are on my toolbox at home...I did lighting and sound throughout HS and college 
Last edited by jeffmoss26; 10/25/15 11:12 AM.
Jeff Moss
Moss Communications
Computer Repair-Networking-Cabling
MBSWWYPBX, JGAE
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Joined: Dec 2005
Posts: 9,178 Likes: 8
Spam Hunter
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Spam Hunter
Joined: Dec 2005
Posts: 9,178 Likes: 8 |
My church has a Whirlwind audio snake so the logo caught my eye.
I Love FEATURE 00
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Joined: Dec 2002
Posts: 9,428 Likes: 1
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They make some of the best stuff in the biz!
Jeff Moss
Moss Communications
Computer Repair-Networking-Cabling
MBSWWYPBX, JGAE
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Joined: Jan 2005
Posts: 15,382 Likes: 13
Moderator-Vertical, Vodavi, 1A2, Outside Wire
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Moderator-Vertical, Vodavi, 1A2, Outside Wire
Joined: Jan 2005
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They are all obviously slave relays since only four wires connect to each one. Two wires for the coil and two for the contact set.
I'm not sure what they used this setup for, but that's all that you have is a bunch of SPST or SPDT slave relay contacts.
Ed Vaughn, MBSWWYPBX
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Joined: Feb 2003
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i think bill has the answer. early horizon analog station ports were four wire from the switch. station ringing was provided on a separate pair. in order to reuse an existing slt, a port/station modification was needed so the phone would ring. not so on later versions.
HE SEEMS TO BE SAYING SOME KIND OF WORDS
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