3Com VCX v7111 User Manual page 183

Parameter
Max. Flash-Hook Detection Period
[msec]
[FlashHookPeriod]
Configuring the General Media Settings
To configure the General Media Settings parameters:
Open the General Media Settings screen (Advanced Configuration menu > Media
1
Settings > General Media Settings option); the General Media Settings screen is
displayed.
General Media Settings Screen
Figure 65
Configure the General Media Settings according to
2
Click Submit to save your changes.
3
To save the changes so they are available after a power fail, see
4
Media Settings, General Media Settings Parameters
Table 60
Parameter
DSP Version Template Number
Max Echo Canceller Length
[MaxEchoCancellerLength]
®
3Com VCX V7111 VoIP Gateway User Guide
Description
Defines the flash-hook period (in msec) for both analog and IP sides.
For the analog side it defines:
- The maximal hook-flash detection period (for FXS gateways). A
longer signal is considered offhook / onhook event.
- The hook-flash generation period (for FXO gateways).
For the IP side it defines the flash-hook period that is reported to IP.
The valid range is 25 to 1500. The default value is 700 msec.
For FXO gateways, a constant of 90 msec must be added to
the required hook-flash period. For example, to generate a
450 msec hook-flash, set 'FlashHookPeriod' to 540.
Description
N/A.
Maximum Echo Canceller Length in msec:
[0] = based on internal gateway settings (default)
[4] = 32 msec
[11] = 64 msec
The gateway must be reset after the value of
'MaxEchoCancellerLength' is changed.
It is unnecessary to configure the parameter
EchoCancellerLength as it automatically acquires its
value from the parameter MaxEchoCancellerLength.
Table 60.
Saving Configuration.
183