H3C Technologies H3C MSR 5600 - Manual (Page 15)

5
Step Command Remarks
2. Enter FXS interface view. subscriber-line line-number N/A
3. Set the electrical impedance
of a country.
impedance { country-name | r550
| r600 | r650 | r700 | r750 |
r800 | r850 | r900 | r950 }
The default is the electrical
impedance of China.
You must configure the same
electrical impedance value on the
originating and terminating
devices.
Configuring the packet loss compensation mode
You can configure the packet loss compensation mode to alleviate the impact of packet loss on voice
quality:
• For discrete packet loss, you can use the general compensation mode to reconstruct lost packets.
• For continuous packet loss, you can use the voice gateway-specific compensation mode to
compensate for lost packets.
To configure the packet loss compensation mode:
Step Command Remarks
1. Enter system view. System-view N/A
2. Enter FXS interface view. subscriber-line line-number N/A
3. Configure the packet loss
compensation mode for the
FXS interface.
plc-mode { general | specific }
By default, the specific algorithm
provided by the voice gateway is
used for an FXS interface.
Configuring an FXS interface to send LCFO signals
You can configure an FXS interface to send a loop current feed open (LCFO) signal when the peer goes
on-hook. This function is used mainly in North America.
To configure an FXS interface to send LCFO signals:
Step Command Remarks
1. Enter system view. System-view N/A
2. Enter FXS interface view. subscriber-line line-number N/A
3. Configure the FXS interface to
send an LCFO signal when the
peer goes on-hook. disconnect lcfo
By default, no LCFO signal is sent
(a busy tone is played to the peer
end).
4. Set the duration of the LCFO
signal.
timer disconnect-pulse value The default is 750 milliseconds.