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MultiVOIP FXS User Guide Cable Pinouts
155
RJ-21 Connector
The footprint of the RJ-21 connector is shown in the figure below and its pin-out list is presented in the
table that follows.
RJ-21 Connector Footprint
RJ-21
Connector
Pin-Out List
TIP:
on Pins 1 – 24
RING:
on Pins 26 - 49
Wire Pairs for
Each Channel
Channel 1 1 26
√ √ √
Channel 2 2 27
√ √ √
Channel 3 3 28
√ √ √
Channel 4 4 29
√ √ √
Channel 5 5 30
√ √ √
Channel 6 6 31
√ √ √
Channel 7 7 32
√ √ √
Channel 8 8 33
√ √ √
Channel 9 9 34
√ √
Channel 10 10 35
√ √
Channel 11 11 36
√ √
Channel 12 12 37
√ √
Channel 13 13 38
√ √
Channel 14 14 39
√ √
Channel 15 15 40
√ √
Channel 16 16 41
√ √
Channel 17 17 42
√
Channel 18 18 43
√
Channel 19 19 44
√
Channel 20 20 45
√
Channel 21 21 46
√
Channel 22 22 47
√
Channel 23 23 48
√
Channel 24 24 49
√
Pin 25 is not
connected.
Pin 50 is not
connected.