Polycom SoundStructure C16 Design Manual page 356

Design Guide for the Polycom SoundStructure C16, C12, C8, and SR12
A - 14
Virtual channel type
stereo
control
control_array
<pctype>
The <pctype> argument defines the physical channel type of the physical
channels in the virtual channel. The <pctype> argument is a system defined
text argument that must be one of the following.
Physical channel type
cr_mic_in
cr_line_out
sr_mic_in
sr_line_out
pstn_in
pstn_out
sig_gen
submix
clink_in
clink_out
digital_gpio_in
Description
A stereo virtual channel
A control channel such as logic input or
output or IR receiver
A collection of control pins, in other words
a group of logic input or output pins
Description
The physical channel is one of the mic/line
inputs on a conferencing device (for
example, the physical channel supports
echo cancellation).
The physical channel is one of the line
outputs on a conferencing device.
The physical channel is one of the mic/line
inputs on a sound-reinforcement device
(for example, the physical channel does
not support echo cancellation).
The physical channel is one of the line
outputs on a sound reinforcement device.
The physical channel for the receive
signal from the analog telephony
interface.
The physical channel for the transmit
signal to the analog telephony interface
The physical channel is the signal
generator input.
The physical channel is one of the
sub-mix channels.
The physical channel is one of the
ConferenceLink inputs.
The physical channel is one of the
ConferenceLink outputs.
The physical channel for the digital logic
input pins