Polycom SoundStructure C16 Design Manual page 53

Viewing OBAM Linked Devices as One Large System
16
A
IN OUT
OBAM
16
B
IN OUT
OBAM
16
C
IN
OUT
OBAM
Note: Numbering Physical Channels in a Multi-Device System
The numbering of the physical channels in a multi-device system is determined by
how the devices are linked over OBAM. Changing the OBAM link cabling after a
system has been designed and uploaded to the devices causing the system to not
operate properly.
If multiple devices are OBAM linked in a different order, the numbering of the physical channels is different.
As an example of what not to do, consider the following figure where device C is connected to both device
A and to device B. Based on the physical ordering algorithm described previously, device A only has an
OBAM OUT connection which makes this device the first device in the link. Next, device C becomes the
second device in the link and finally device B becomes the third device in the link. The result is that the inputs
Polycom, Inc.
16
1
16
1
16
16
1
16
16
1 1
A
16 16
1 17
B
16 32
1 33
C
16 48
1
A
16
17
B
32
33
C
48
53