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 Pin-outs for T1/E1/J1 the loopback cable:
1<->4
2<->5
Image Added


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A108 "Y" Cable Pin-outs 



Y Cable for A108 to 2 separate T1/E1 (straight). This is to connect the A108 against lines from the Telco.
    A = port N; B = port N + 4

1 <-> 1A
2 <-> 2A
3 <-> 1B
4 <-> 4A
5 <-> 5A
6 <-> 2B 
7 <-> 4B
8 <-> 5B


Y Cable for A108 to 2 separate T1/E1 (cross). This is to connect the A108 against another T1/E1 card.

    A = port N; B = port N + 4
1 <-> 4A
2 <-> 5A
3 <-> 4B
4 <-> 1A
5 <-> 2A
6 <-> 5B 
7 <-> 1B
8 <-> 2B

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