What I forgot to include in my previous post (my excuse is that I was interrupted part way through and returned about an hour later) was the way the two jacks are wired. Except where stated otherwise, each terminal on the first jack is wired to the corresponding one on the second. The exceptions are:
Code:
first station second station
T17 (home line) T19 (extn 1A)
T18 (ring) T20 (extn 1B)
T19 (n/c) T21 (n/c)
T20 (n/c) T22 (n/c)
T21 (extn 2A) T17 (home line)
T22 (extn 2B) T18 (ring)
In addition, the following external connections are made:
Code:
exch 1A T5
exch 1B T6
exch 2A T1
exch 2B T2
battery -ve T13
battery +ve T14