5 netnim shelf with cim/ccms, Netnim shelf with cim/ccms, Netnim shelf w/cim/ccms sw & jmpr set -4 – EFJohnson 3000 SERIES User Manual
Page 184: Pin 1 - output, Pin 2 - vtm, Pin 2 - vtm pcm (source), Pin 1 - input, Pin 2 - output, Pin 3 - input, Pin 1 - primary tx pcm