Polycom SoundStructure C16 Design Manual page 396

Design Guide for the Polycom SoundStructure C16, C12, C8, and SR12
set pstn_in_gain "Phone
In" 6
Command
get pstn_line_voltage
"Phone Out"
A - 54
val pstn_in_gain "Phone
In" 6
pstn_line_voltage PSTN Line Voltage
Argument
Channel Type
Value Type
Read/Write Mode
Phys Chans
Virt Chans
System Limits
Description
This parameter indicates the line voltage (in Volts) of the PSTN interface. The
value is valid in both on-hook and off-hook modes. The value can be positive
or negative, indicating the polarity of the tip/ring voltage. When the value
changes sign, it indicates that a polarity reversal has occurred.
Examples
Response
val pstn_line_voltage
"Phone Out" 0
pstn_loop_current PSTN Loop Current
Argument
Channel Type
Value Type
Read/Write Mode
Phys Chans
Virt Chans
System Limits
Adjusts the input gain on the phone input to 6dB. Note
that the phone in virtual channel name must be used, not
the phone out virtual channel name.
Argument value
Virtual Channel
Integer
Read-Only
Analog Telephony Output
Mono
Minimum: -128, Maximum: 128
Description
Queries the pstn_line_voltage and returns the measured
value in Volts on the phone line "Phone Out". Note that
the phone out virtual channel name must be used, not the
phone in virtual channel name.
Argument value
Virtual Channel
Floating-Point
Read-Only
Analog Telephony Output
Mono
Minimum: 0.0, Maximum: 281.6, Resolution: 0.1