18
Step Command Remarks
1. Enter system view.
system-view N/A
2. Enter voice interface view.
subscriber-line line-number N/A
3. Configure the threshold
parameters for DTMF
detection.
dtmf threshold analog index
value
By default, indexes 0 to 12 correspond to
1400, 458, -9, -9, -9, -9, -3, -12, -12, 30,
300, 3200, and 375, respectively.
This command is used by professional
personnel to adjust the device in the case
of DTMF detection failure. Usually, the
default value is adopted.
4. Configure the DTMF
detection sensitivity level.
dtmf sensitivity-level { high |
low | medium
[ frequency-tolerance value ] }
By default, the DTMF detection sensitivity
is low.
This command applies to only FXS and
FXO interfaces
Adjusting parameters for voice interfaces
The configuration tasks in this section are all optional.
Adjusting gains
You can adjust gains to control the amount of volume in the input or output direction.
IMPORTANT:
Gain adjustment might lead to call failures. H3C recommends not adjusting the
ain. If necessary, do it
under the guidance of technical personnel.
To adjust gains:
Step Command Remarks
1. Enter system view.
system-view N/A
2. Enter voice interface view.
subscriber-line line-number N/A
3. Set the input gain.
receive gain value The default is 0 dB.
4. Set the output gain.
transmit gain value The default is 0 dB.
Adjusting timing parameters
Step Command Remarks
1. Enter system view.
system-view N/A
2. Enter voice interface view.
subscriber-line line-number N/A
