isdn wiring

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 Question by Eric Ullmann posted 22 May 2001
 isdn wiring
Hello and thank you for your time. I am installing an isdn line using cat 5 wire and a typical levinton cat 5 modular jack. I have 8 wires on the cat 5 jack and I can only use two wire on the telephone juction box where the lines from the pole come in. which two do I use
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 Answer by Roman Kitaev posted 23 May 2001
Hi, Eric!

ISDN (basic access)uses pins 3&6 for Transmit and pins 4&5 for Receive.

If you jack is wired as 568B, then you have to connect pairs 1 and 3 (blue and green).

If you jack is wired as 568A, then you have to connect pairs 1 and 2 (blue and orange).

The wiring scheme for your Leviton jack is to be marked on it.


Best regards
Roman Kitaev, RCDD

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