2500 with an Amphenol connector

[podor]

I picked up a WE 2500 that has a standard issue 3 conductor cord that is connected to a 153A Amphenol connector to the violet/slate pair. What would this be used for? It's from '74, so I was thinking it would be used on a 1A2 system. I was thinking it could be for a secretary or excluded line so the line could be cut off (excluded) during private conversations, but I would think that it would need A control, like a 2500M. Maybe an intercom, but most 1A2 intercom systems used buzzers. What do you think?

[poplar1]

Is it a 2500D? With a 3-conductor cord, it's possible that there were already 25-pair cables on site, and the installer used the 153A adapter to pick up a spare pair for this single line phone, which was not connected behind a 1A2 Key System but rather was just connected directly to a line.

[unbeldi]

I believe that many 'modern' offices suites built out in the 60s and 70s were prewired with 25-pair cables to every room.  I once rented an entire office floor in an almost century-old building that was renovated in the 70s for a well-known architect and it had telco cable everywhere.  The 620 key system had been cut out by my time, and it was clear that a couple non-key telephones were directly connected to CO lines with such an adapter cord.

I used the adapter cord myself, actually, until I got the old key system rewired again and working (without any documentation, btw.)

[podor]

That makes sense. The good thing is that the cord is intact, since everything else is numbers matching. Most of the time, the phones in my price range are hacked/modified.

[Babybearjs]

I saw the phone on Ebay.... Interesting find....