Connection Guideline of VIT1/E1 and PBX E1/T1 module

Connection Guideline of VIT1/E1 and PBX E1/T1 module

I.    Pinouts of VIT1/E1:

Pin	Signal
1	Rx, ring, -
2	Rx, tip, +
4	Tx, ring, -
5	Tx, tip, +

II.    Straight cable pinout:

1.     RJ48/45 (VIT1/E1) to RJ48/45 (PBX E1/T1 module)

Pin (on VIT1/E1)	Pin (on PBX E1/T1 module)	Signal
1	1	Rx, ring, -
2	2	Rx, tip, +
4	4	Tx, ring, -
5	5	Tx, tip, +
3	3	Shield/return/ground
6	6	Shield/return/ground

2.     RJ48/45 (VIT1/E1) to DB-15 (PBX E1/T1 module)

Pin (on VIT1/E1)	Pin (on PBX E1/T1 module)	Signal
1	11	Rx, ring, -
2	3	Rx, tip, +
4	9	Tx, ring, -
5	1	Tx, tip, +
3	4	Shield/return/ground
6	2	Shield/return/ground

 

III.   Crossover cable pinout:

1.     RJ48/45 (VIT1/E1) to RJ48/45 (PBX E1/T1 module)

Pin (on VIT1/E1)	Pin (on PBX E1/T1 module)	Signal
1	4	Rx, ring ,- === Tx, ring, -
2	5	Rx, tip, + === Tx, tip, +
4	1	Tx, ring, - === Rx, ring, -
5	2	Tx, tip, + === Rx, tip, +
3	3	Shield/return/ground
6	6	Shield/return/ground

2.     RJ48/45 (VIT1/E1) to DB-15 (PBX E1/T1 module)

Pin (on VIT1/E1)	Pin (on PBX E1/T1 module)	Signal
1	9	Rx, ring , - === Tx, ring, -
2	1	Rx, tip, + === Tx, tip, +
4	11	Tx, ring, - === Rx, ring, -
5	3	Tx, tip, + === Rx, tip, +
3	4	Shield/return/ground
6	2	Shield/return/ground