I've spent a happy couple of hours running 4 new #phone lines from one side of the #telephoneExchange shed to the other.

There's not a lot to see (just some new outlets on the wall behind the #isdx) but I think this is the first bit of #telephony I've done in the shed in months.

It means I don't have to drape the #modem cables across the doorway any more!

I’ve spent over a year been looking for a Mk1 operators console for my #isdx #TelephoneExchange…

I finally got one a few weeks back, but before I start trying to wire it up to the #PhoneExchange I wanted to give it a once over, and #GetTheBatteriesOut if needed!

It all looks good, no obviously leaky caps, no battery to remove, most of the chips are date coded 1986.

I’ve put it back together, and now I can proceed with sorting out the exchange end!

#phone #telephone #telecoms #vintagePhone

The acrylic insulators are held in place by a pair of roll pins.

I’ve just spent a satisfying half an hour or so using a vice, a nail, and a socket set (as a spacer) to push the pins out of one side. I could then remove the insulator, and move it over to the other broken card puller.

I’ve now got one fully working card puller instead of two broken ones!

Not that I’ll ever use it, the cards come out just fine without the special magic tool!

2/2

#isdx #TelephoneExchange

These devices are “card pullers” for removing PCBs from an #isdx #TelephoneExchange

The pins locate in holes on the card, and the acrylic insulators press against the chassis. You then squeeze the handle and frame together, and the card unseats from the backplane so you can remove it.

The acrylic bits are prone to snapping off as they rattle about in the back of the van, and it’s rare to find a complete one of this style these days!

I have collected two broken ones...

1/2

Behold! The majestic rarity that is the ED 2.88MB #floppyDisks used by my #ISDX #TelephoneExchange

There are even some diagnostic disks in here that “might” work with the firmware revision mine is running!

This is beyond exciting!

Combined with the spare drives I scored today, these will allow me to back up my running config before I lose the lot by fiddling with it!

Oops! I appear to have come home with the operators console, and an enormous quantity of spare PCBs and cables for my #isdx #TelephoneExchange

More importantly, there are also two spare 2.88Mb ED #FloppyDrives in there, it’s taken nearly a year to track some down!

I've been poking at the documentation for my #ISDX #TelephoneExchange with a view to making up some cables... and... I think this might be the craziest pinout I've ever encountered.

Numbering a matrix of pins as ABC/1-14 fine, I can understand that.

But:

Pair 1 = C3+A4
Pair 2 = C4+A5
Pair 3 = A8+B8
Pair 4 = C11+A12
(etc)

How on earth does that make any sense?

I can't buy the connectors anyway, and premade tails seem to be £20 each, so it doesn't matter... but still!

#Telephone #Telecoms

Are there any #Telecoms folk out there who have a copy of the documentation for an ancient #ISDX DLI card, part No 871/2/06561/004

I want to check what signalling the 06561/004 variant supports

I've got the docs for the 06562/004 which I think is similar (but later?) car - but I'm wary of extrapolating...

I wouldn't normally ask, but please boost for reach?

#PABX #PBX #TelephoneExchange #PhoneExchange

Are there any #Telecoms folk out there who have a copy of the documentation for an ancient #ISDX DLI card, part No 871/2/06561/004

I want to check what signalling the 06561/004 variant supports

I've got the docs for the 06562/004 which I think is similar (but later?) card - but I'm wary of extrapolating...

I wouldn't normally ask, but please boost for reach?

#PABX #PBX #TelephoneExchange #PhoneExchange