R2511-HP MSR Router Series Web-Based Configuration Guide(V5)

367
Figure 733 ISDN line configuration page
Table 275 Configuration items
Item Descri
p
tion
Description Description of the ISDN line.
Comfortable Noise Function
Generate some comfortable background noise to replace the toneless
intervals during a conversation. If no comfortable noise is generated, the
toneless intervals will make both parties in conversation feel uncomfortable.
• Enable.
• Disable.
By default, the comfortable noise function is enabled.
Echo Cancellation Function
• Enable.
• Disable.
After enabling this function, you can set the echo duration, that is, the time that
elapses from when a user speaks to when he hears the echo.
Echo Duration
Nonlinear Function of Echo
Cancellation
• Enable.
• Disable.
Input Gain on the Voice
Interface
When the voice signals on the line
attenuate to a relatively great extent,
increase the input gain value.
IMPORTANT:
Gain adjustment might lead to call
failures. HP recommends not
adjusting the gain. If necessary, do
it with the guidance of technical
personnel.
Output Gain on the Voice
Interface
When a relatively small voice signal
power is needed on the output line,
increase the voice output gain value.
Companding Law
Configure a companding law used for quantizing signals.
• A-law, used in China, Europe, Africa, and South America.
• -law, used in USA.
IMPORTANT:
A BRI interface does not support this configuration item.