Polycom C16 - Manual (Page 334)

11 - 6
Design Guide for the Polycom SoundStructure C16, C12, C8, and SR12
OBAM Link
The OBAM cable is a standard 1394b BETA style cable. The maximum length
of this cable is 10 feet (3 m).
While OBAM Link uses 1394b cables, the underlying bus protocol is not
IEEE1394b compliant which means that external IEE1394b devices will not be
compatible with OBAM Link. Using IEE1394b hubs or repeaters will not
extend the length of OBAM and any non-SoundStructure approved device
that is placed on the OBAM Link will prevent OBAM Link from operating
properly.
Connector Pinout
1394b
BETA Plug 1394b
BETA Plug
1 3
2 4
9 5
3 1
4 2
5 9
6 6
8 8
SHELL SHELL
Black
Red
Green
Blue
Orange
White
Warning
Pin 7 is not connected.