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NEC / Nitsuko BPX Schematics (DX2E - 4ASTU - S2 board)

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chinoRuiz

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Dear Members.

Do you know where could I find the schematics of an analog trunks PBX board called "DX2E - 4ASTU - S2".
It is part of a Nitsuko / NEC BPX system called 124i

I have found this link with technical documentation, but there is no schematics.
**broken link removed**


The reason is that the internal ring generator is broken and I must repare it.

Thank you very much.

This is a picture of it:
 

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