Polycom SoundStructure C16 Design Manual page 338

Design Guide for the Polycom SoundStructure C16, C12, C8, and SR12
11 - 10
SoundStructure device's audio input and output to other balanced or
unbalanced audio equipment, follow the wiring convention in the unbalanced
audio connections in the following figure.
1
XLR Male
T
T
T
2 1
2
3
3
XLR Female
Balanced Audio Connections
S
T S
S T S
S S
T
Unbalanced Audio Connections
T R S
S
R
T
T S
S
T