[VoIP] Strowger 2000-type Final Selector

Tue Dec 18 10:03:24 CST 2007

Having run to the basement and picked up a switch....

If you count 8 'pins' in from the left you are in the middle of the u
points.
So
Looking from the rear you get:

32, 30, 28, 26, 24, 22, 20, 18, 16, 14, 12, 10, 8, 6, 4, 2, 1, 3, 5, 7, 9,
11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31.

Battery (black wire or purple) is on 12, earth on 11 (red wire)

Jellybone = telephone!

Is this more help?

(I got my left and right wrong in my last post!)

Andy G

-----Original Message-----
From: voip-bounces at ckts.info [mailto:voip-bounces at ckts.info] On Behalf Of
Mad Mark
Sent: 18 December 2007 15:32
To: Voice Over IP Tandem for Analog Switches
Subject: Re: [VoIP] Strowger 2000-type Final Selector

*** OFF LIST REPLY

Ok, looking at the switch as if it were in situ as if it were on the
rack, if I turn it around so the contacts are facing me (not flipping
it upside down)... I don't think those contacts are connected. I'm
reading complete open circuit. Confirm for me the contacts are -50v on
6th U-connector to the right, outside terminal, and GND on 6th
U-connector to the left, outside terminal.

I hope my ASCII comes out alright on your end. Hotmail does not have a fixed
width font setting. But, is my understanding correct?

1. 9. 7. 5. 3. 1. i .2 .4 .6 .8 .0 .2
|| || || || || || i || || || || || ||

where i is the white line.

> From: axg at syntec.co.uk
> To: voip at ckts.info
> Date: Tue, 18 Dec 2007 14:47:32 +0000
> Subject: Re: [VoIP] Strowger 2000-type Final Selector
> 
> At the back of the switch you will find a connector (a set of what look
like
> teeth for want of a better description!) This is called the 'u' points. 
> 
> There is a white line between the middle ones. If you count from that line
> outwards to the right (this is the even connectors (I Think!!!)) they go
2,
> 4, 6, 8,10 etc.  contact 12 is Battery (ie -50 v dc) Note that each 'pin'
is
> two contacts, there is a small insulating piece between them, so contact
12
> is the outer contact on the third pin.
> 
> Counting the other way from the line you go 1, 3, 5, 7, etc and contact 11
> is earth (ie 0 v dc).
> 
> Incoming line is on 1 and 2, p wire is on 9. So looping 1 and 2 out to a
> loop dialling jellybone will allow you to dial into it.
> 
> 
> Hopefully this will help?
> 
> Andy G
> 
> -----Original Message-----
> From: voip-bounces at ckts.info [mailto:voip-bounces at ckts.info] On Behalf Of
> Mad Mark
> Sent: 18 December 2007 13:34
> To: VOIP
> Subject: Re: [VoIP] Strowger 2000-type Final Selector
> 
> 
> 
> 
> With many many thanks to Jon for pointing me in the right direction, I
> have obtained the maintenance documentation for a switch *very* similar
> to mine. There are only a few differences, making me think it's a
> slightly different model, but there was more than enough information to
> get the switch fixed and adjusted into a workable condition. It now
> steps horizontally and vertically with no trouble at all, and returns
> to the home position flawlessly.
> 
> 
> 
> The only thing now is to make sure the electrical side of things work
> properly. As I don't have a 48.6V supply at the moment, I can't do any
> testing as yet... Not that I could without knowing where the power needs
to
> go. Tracing the wires is out of the question, as any color the wires may
> have had has since faded into obscurity. Still looking for a schematic of
> the switch, or at least a pinout so I know what connections on the back
and
> front are used for what.
> 
> There are 2 wire jumpers on the front test panel, a red and green one. I
> don't know what these are for - perhaps used to take the switch out of
> service?
> 
> 
> 
> > Date: Mon, 17 Dec 2007 12:52:33 +0000
> > From: g4vft at btinternet.com
> > To: voip at ckts.info
> > Subject: Re: [VoIP] Strowger 2000-type Final Selector
> > 
> > 
> > Mark,
> > For the mechanical adjustments, take a look at Andy Greening's site, 
> > www.uax.me.uk
> > Go to Misc EI's and download B5156.
> > As for the diagram, you need to tell us the "AT" number of the selector,

> > usually on a paper label, somewhere around the casting.
> > 
> > 
> > Jon
> > 
> > Mad Mark wrote:
> > > So, I picked up the selector today. The first piece of my collection.
> It's a beauty!
> > >
> > > However, there is a little fault on the switch. Theres a little
armature
> that pushes the selector rod around to swing the contacts. This little arm
> is stuck in a raised position as the hinge is a little stiff and won't let
> it drop back down to push the next ratchet tooth. Has anyone repaired one
of
> these beautiful devices before? Can you give me some tips or pointers as
to
> how I might go about repairing this little part?
> > >
> > > Also, I'm wondering if anyone has a scan of the schematic diagram of
> this selector. From Mr. Buckley I've learned many things about this
switch,
> but sadly, my knowledge is still a little incomplete.
> > >
> > > Thanks heaps.
> > >
> > > _________________________________________________________________
> > > New music from the Rogue Traders - listen now!
> > >
>
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> > >   
> > 
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