Grass Valley K2 AppCenter v.9.0 - Manual (Page 271)

The optional audio cable has connections as follows:
RS-422 connector pinouts K2 Summit 3G
The K2 Summit 3G Production Client RS-422 interface conforms to ANSI/SMPTE 207M-1997
standard (SMPTE 422).
Pinouts for the individual RJ45 connectors are as follows:
Description Signal Pin #
Differential Transmit Data (high) (out TXB) +TXD 1
Differential Transmit Data (low) (out TXA) -TXD 2
Differential Receive Data (high) (in RXB) +RXD 3
Signal Ground GND 4
Signal Ground GND 5
Differential Receive Data (low) (in RXA) -RXD 6
Signal Ground GND 7
Signal Ground GND 8
Balanced signals are placed on twisted wire pairs within a standard CAT5 or CAT3 cable.
RS-422 connector pinouts first generation K2 Summit/Solo system
The first generation K2 Summit/Solo system RS-422 interface conforms to ANSI/SMPTE 207M-1997
standard (SMPTE 422).
Pinouts for the individual DB9 connectors are as follows:
29 October 2012 K2 AppCenter User Manual 271
Connector pinouts