3Com MSR 50 Series Configuration Manual page 2255

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Configure the duration before a forced on-hook
In some countries, PBXs do not play busy tones, or the busy tone played by them
only lasts a short period of time. When noise is present on a transmission link, the
silence-th-span command cannot solve the problem that the resource of the FXO
interface cannot be released. In this case, you can use the hookoff-time
command to solve the problem.
Follow these steps to configure the duration before a forced on-hook:
To do...
Enter system view
Enter voice view
Enter FXO voice subscriber
line view
Configure the duration before
a forced on-hook
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An ongoing call will automatically be disconnected when the duration expires.
Configuring the There are two off-hook modes after the FXO voice subscriber line receives ringing:
Off-Hook Mode
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Follow these steps to configure the off-hook mode:
To do...
Enter system view
Enter voice view
Enter FXO voice subscriber
line
Configure the off-hook mode hookoff-mode { delay |
Usually, you are not recommended to use this function because incorrect
configuration may lead to wrong on-hooks.
You are recommended to test multiple groups of parameters during
configuration to find a proper group of parameters that will not only avoid
wrong on-hooks, but also quickly release the resource of the FXO voice
subscriber line after on-hook.
Immediate mode: In this mode, when a call arrives, the FXO interface goes
off-hook immediately and then the user performs the second stage dialing.
Delay mode: In this mode, you need to configure a dedicated line number,
which the system uses to connect the call to the called user automatically. The
communication can be performed over the FXO subscriber-line only after the
called user picks up the telephone.
Configuring FXO Voice Subscriber Line
Use the command...
system-view
voice-setup
subscriber-line line-number
hookoff-time time
Use the command...
system-view
voice-setup
subscriber-line line-number
immediate }
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Remarks
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Optional
No duration is configured by
default.
The configuration will take
effect on all interfaces of a
card after this command is
executed.
Remarks
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Optional
Immediate mode by default