Physical Channel Summary - Polycom SoundStructure C16 Design Manual

Physical Channel Summary

The organization of the devices in this example would make it confusing to
properly terminate inputs and outputs to the desired physical inputs and out-
puts. Any OBAM linking scheme other than the out-to-in, top-to-bottom
system, is not recommended as it will likely increase system debug and instal-
lation time.
Device Local Numbering
A 1 - 16
B 1 - 16
C 1 - 16
Due to this possible confusion of the numbering of physical inputs and out-
puts, always connect the devices as recommended in the top-down order
connecting the higher OBAM OUT connection to the next OBAM IN
connection.
Physical channels and the OBAM Link were introduced in the previous section
as a simplification of how to refer to the actual physical inputs and outputs
when multiple SoundStructure devices are used. By OBAM Linking multiple
SoundStructure devices in an OBAM out-to-OBAM-in fashion from top to bot-
tom, the physical channel numbers in a multi-unit installation will be
sequential from 1 to the maximum number of inputs and outputs in the sys-
tem. No longer is a specific device identification required to uniquely identify
which input "1" is meant when there are multiple devices. When multiple
SoundStructure devices are used, there is only one input "1" and it corre-
sponds to the first input on the top device. The first input on the second device
will be input 17 (if the first device is a SoundStructure C16).
In the next section, the concept of physical channels will be extended as the
new concept of virtual channels is introduced as a way to easily and, as will be
shown, more flexibly reference the physical input and output channels, sim-
plifying both SoundStructure device setup and how SoundStructure devices
are controlled with external control systems.
SoundStructure Design Concepts
System Numbering
1 - 16
33 - 48
17 - 32
3 - 9