User`s guide

PassFinder AP2520 VoIP Router/Gateway Operation Manual Version 1.10 / Mar. 2002
AddPac Technology Co., Ltd. -
250 -
5.7.3.7.3. Command Mode
Voice-port configuration Mode
5.7.3.7.4. Usage Guideline
A system-wide loss plan must be implemented using both input gain and output
gain commands. Other equipment (including PBXs) in the system must be
taken into account when creating a loss plan.
This default value for this command assumes that a standard transmission loss
plan is in effect, meaning that normally, there must be -6 dB attenuation
between phones.
Connections are implemented to provide -6 dB of attenuation when the input
gain and output gain commands are configured with the default value of 0.
You can't increase the gain of a signal going out into the PSTN, but you can
decrease it. Therefore, if the voice level is too high, you can decrease the
volume by either decreasing the input gain value or by increasing the output
attenuation.
5.7.3.7.5. Examples
The following example on the router configures a 6-decibel gain to be inserted
at the transmit side of the interface:
port 1/4
output gain 3
5.7.3.8. polarity-inverse
To enable polarity-inverse function for a FXS voice port’, use the
polarity-inverse voice-port configuration command. Use the no form of this
command to disable polarity-inverse.
polarity-inverse