|
|
Joined: Jun 2008
Posts: 1
Member
|
OP
Member
Joined: Jun 2008
Posts: 1 |
What do I do to connect an old Bell System 4a speakerphone to an ordinary home phone setup? I assume I need some esoteric parts and wiring. Is such gear even available today?
|
|
|
Visit Atcom to get started with your new business VoIP phone system ASAP
Turn up is quick, painless, and can often be done same day.
Let us show you how to do VoIP right, resulting in crystal clear call quality and easy-to-use features that make everyone happy!
Proudly serving Canada from coast to coast.
|
|
|
|
Joined: Dec 2004
Posts: 5,722
Member
|
|
Member
Joined: Dec 2004
Posts: 5,722 |
You might want to check the 1A2 forum....there is quite a thread on just that.... 
Ken
---------
|
|
|
|
|
Joined: May 2007
Posts: 5,058 Likes: 5
Moderator-1A2, Cabling
|
|
Moderator-1A2, Cabling
Joined: May 2007
Posts: 5,058 Likes: 5 |
Do a search on this forum for "4A".
The post "4A Shopping List" should have the info you require (so should some of the others).
If you're still having trouble, come back and ask away.
Sam
"Where are we going and why are we in this hand basket?"
|
|
|
|
|
Joined: Sep 2006
Posts: 3,290
Member
|
|
Member
Joined: Sep 2006
Posts: 3,290 |
You need a special version of the 2500 set, called a 2500S. It has extra switchhook contacts that are required for on-hook/off-hook switching, and a multi-conductor spade-ended cord. The extra leads are analogous to the violet leads in a 2565HK. These occasionally surface for sale or trade in the ATCA or TCI club forums or newsletters.
You will also need a 225D connecting block, which is made of unobtainium.
Arthur P. Bloom
"30 years of faithful service...15 years on hold"
|
|
|
|
|
Joined: Dec 2005
Posts: 7,056
RIP Moderator-Mitel, Panasonic
|
|
RIP Moderator-Mitel, Panasonic
Joined: Dec 2005
Posts: 7,056 |
Unobtainium?!  Thanks, Arthur, made my day! John C. (Not Garand)
When I was young, I was Liberal. As I aged and wised up, I became Conservative. Now that I'm old, I have settled on Curmudgeon.
|
|
|
|
|
Joined: Oct 2004
Posts: 812
Member
|
|
Member
Joined: Oct 2004
Posts: 812 |
Panasonic made a speaker 20 years ago with A-lead control for use on 1a2.. Graybar sold them.
If you find this type of Pani speaker phone one would have to re-wire the switch hook leads to make it work.
I installed about 50 of them on standard 2500 sets and 2564's with conversions of the network in the set. You need a print of the network and study it and one can make it work. It was a cost effective after market speaker back then for a 2500 set.
4A's were rare 20 years ago. I've got one and it goes to the highest bidder..
|
|
|
|
Forums84
Topics94,287
Posts638,784
Members49,767
| |
Most Online5,661
May 23rd, 2018
|
|
|
|
