The monitor tap cable allows connection of the receivers of two E1/T1 Sangoma ports to be used as monitors. The pinout diagram below shows a E1/T1 crossover tap cable. Another option is to build a straight cable tap that can be used with either straight or crossover cables.
References:
Sangoma port pinout specifications.
Materials:
- Quanity 4, segment of Cat5e or Cat3 cable.
- Quantity 4, 8 position block connectors, aka RJ-45 connectors
- Small tie-wrap
- Cable splice insulation, for example
- Heat shrink tubing
- Tape
- Silicone
Tools:
- Wire cutters
- Block connector crimp tool
- Soldering pencil and solder
Procedure:
- Identify wires used for positions 1, 2, 4, 5 in the 8 position block connector. Ignore the crossover side of the cable if a crossover tap is being made.
- Label two cable segements as Terminals
- Label one segment as Tap_A
- Label one segment as Tap_B
- Create tap junction
- Bare the 1, 2, 4, 5 wires on the Terminal segments
- Bare the 1 and 2 wires on both of the Tap segments
- Twist the 1 wires together on the Terminal segements; this is the wire 1 junction; repeat for the 2, 4, and 5 wires
- For Tap_A
- Twist the 1 wire to the the wire 1 junction; solder
- Twist the 2 wire to the the wire 2 junction; solder
- For Tap_B
- Twist the 1 wire to the the wire 4 junction; solder
- Twist the 2 wire to the the wire 5 junction; solder
- Bundle the junction with a tie-wrap
- Install the 1, 2, 4, 5 wires in the corresponding pins on an 8 position block connector on one of the Terminal segments
- Attach 8 position block connector to remaining Terminal segment
- If straight cable, install the 1, 2, 4, 5 wires in the corresponding pins on an 8 position block connector
- If crossover cable,
- Install wire 1 to connector position 4
- Install wire 2 to connector position 5
- Install wire 4 to connector position 1
- Install wire 5 to connector position 2
- Attach 8 position connector to Tap_A
- Install wire 1 of to connector position 1
- Install wire 2 of to connector position 2
- Attach 8 position connector to Tap_B
- Install wire 1 of to connector position 2
- Install wire 2 of to connector position 2
