3Com MSR 50 Series Configuration Manual page 2254

2254 C 131: V
HAPTER OICE
n
S L C
UBSCRIBER INE ONFIGURATION
You can increase the number of busy tone periods for detection by using the
■
busytone-t-th command to improve the busy tone detection accuracy. This
can avoid wrong on-hooks resulting from incorrect busy tone data to some
extent, and meanwhile, may lead to more on-hook failures.
Before you configure a number of busy tone periods for detection, you must
■
test it fully to make sure that on-hook operation can be done properly.
Enable the busy tone sending
In the case that the PBX does not play a busy tone to a digital telephone, when the
remote telephone goes on-hook or is occupied, you can enable the FXO interface
to send a busy tone to the PBX, which will transparently transmit the busy tone to
the digital telephone.
Follow these steps to enable the busy tone sending:
To do...
Enter system view
Enter voice view
Enter FXO voice subscriber
line view
Enable the busy tone sending send-busytone { enable |
Enable silence detection-based automatic on-hook
Silence detection-based automatic on-hook prevents the case that the resource of
the FXO interface cannot be released owing to busy tone detection failure when
the busy tone parameters provided by the connected PBX are special.
When the signal amplitude between two successive sampling points is less than
the silence threshold, the system considers that the line goes into the silent state.
If the line stays in the silent state longer than the silence duration for automatic
on-hook, the system will automatically disconnect the call.
Follow these steps to enable silence detection-based automatic on-hook:
To do...
Enter system view
Enter voice view
Enter FXO voice
subscriber line view
Enable silence
detection-based
automatic on-hook
Use the command...
system-view
voice-setup
subscriber-line line-number
time seconds }
Use the command...
system-view
voice-setup
subscriber-line
line-number
silence-th-span threshold
time-length
Remarks
-
-
-
Optional
Disabled by default.
The time option appears only
after the send-busytone
enable command is
executed.
Remarks
-
-
-
Optional
By default, the silence threshold is 3
and the silence duration for automatic
on-hook is 7200 seconds (namely, two
hours).