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Nortel M2250 wiring

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brtim

Technical User
Jan 21, 2004
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We have a Nortel Meridian Option 11C that has been working well for over 20 years.
Recently our M2250 stopped working and I discovered wires had broken off inside the DB25 connector going to the console. We ordered a refurbished console, in case the old one had died. But now neither the old console or the new one works with the re-wiring that I have done. Perhaps I killed them in the process of wiring the new DB25 cable, or perhaps I have not understood the proper wiring scheme.

Here is how the new DB25 connector is now wired:

DB25 pin outs TN
14 (tip), 2 (ring) - 1st TN 22-4, yel/blu, blu/yel
15 (tip), 3 (ring) - 2nd TN 22-5, yel/org, org/yel
5 (tip) - Aux + 22-6, yel/grn & 22-7 yel/brn
6 (ring) - Aux - 22-6, grn/yel & 22-7 brn/yel
25 (tip), 13 (ring) – PWR TN 22-8, yel/slt, slt/yel

These are programmed as:
22-4, 22-5 – 1st and 2nd TN’s
22-6, 22-7, 22-8 – PWR TN’s

Does this wiring look correct?
I have also changed out the digital line card for slot 22, but that doesn't seem to help either.
Thanks for any help.

Br Tim
 
Thanks very much for your help.
brtim
 
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