R0106-HP MSR Router Series Voice Configuration Guide(V7)
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• Immediate mode—Upon receiving a call, the FXO interface goes off-hook and sends a dial tone to
the calling party. Then, the calling party dials the destination number.
• Delay mode—Upon receiving a call, the FXO interface places a call to the specified private line
number. When the called party picks up the phone, the FXO goes off-hook. This mode needs to
work with the private line auto ring-down (PLAR) function. For more information about PLAR, see
"Configuring dial programs."
To configure the off-hook mode:
Ste
p
Command
Remarks
1. Enter system view.
system-view N/A
2. Enter FXO interface view.
subscriber-line line-number N/A
3. Configure the off-hook mode.
hookoff-mode { delay |
immediate }
By default, the immediate mode is
used.
Configuring ring detection parameters
PBXs from different vendors use different types of ring signals. By setting ring detection parameters, you
can enable the FXO interface to detect ring signals of different frequencies and waveforms.
When you set the debounce time for ring detection, follow these restrictions and guidelines:
• Do not set the debounce time during a conversation.
• HP recommends that you set the debounce time to be no smaller than 8 milliseconds, because false
detection might occur under the influence of line interference.
• If you set the debounce time on an FXO interface of a card, the setting takes effect on all FXO
interfaces of the card.
• The ring-detect debounce command is supported only on routers installed with the interface module
SIC-1FXO, SIC-2FXO, or HMIM-4FXO.
To configure ring detection parameters:
Ste
p
Command
Remarks
1. Enter system view.
system-view N/A
2. Enter FXO interface view.
subscriber-line line-number N/A
3. Set the debounce time for ring
detection on the FXO interface.
ring-detect debounce value The default is 10 milliseconds.
4. Set the frequency value for ring
detection.
ring-detect frequency value
The default is 40 Hz.
This command is supported only on
routers installed with the interface
module SIC-2FXS1FXO,
HMIM-8FXS8FXO, or
DSIC-4FXS1FXO.
Setting the electrical impedance
The electrical impedance setting must be subject to country specifications. Each country corresponds to
an impedance value. You specify an impedance value while specifying a country.