Polycom SoundStructure C16 Design Manual page 543

The <label> argument is a user-defined text argument that defines the name for the new virtual channel.
If a virtual channel or virtual channel group already exists with the same label, then SoundStructure will
respond with an error message.
<vctype>
The <vctype> argument is a system-defined text argument that defines the type of virtual channel that will
be created. The following values are supported.
Virtual channel type
mono
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
voip_in
voip_out
sig_gen
submix
clink_in
Polycom, Inc.
Description
A mono virtual channel
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 to the analog telephony
interface.
The physical channel for the transmit signal to the analog telephony
interface
The physical channel for the receive signal to a VoIP telephony interface.
The physical channel for the transmit signal from the VoIP 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.
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