3Com MSR 50 Series, Configuration Manual

Page: 2257 / 2443

Configuring E&M Voice Subscriber Line 2257
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This feature involves the caller-permit and private-line commands. For details
about these two commands, refer to “Dial Plan Configuration” on page 2289 .
Configuring E&M
Voice Subscriber Line
Configuration
Prerequisites
The router is equipped with an E&M interface card.
The basic functions of E&M voice subscriber lines are configured.
Configuring Cable Type The cable mentioned refers to the one between the voice router and the peer
device. It affects only the transmission of voice, instead of signaling. If an improper
cable is configured, users may only hear one-way audio.
Follow these steps to configure the cable type for the analog E&M trunk:
Configuring Signal Type Follow these steps to configure the signal type for the E&M voice subscriber line:
Enable the private line auto
ring-down (PLAR) function for
the bound FXS voice
subscriber line private-line string Required
Disabled by default.
Configure an interval
between on-hook and
off-hook timer hookoff-interval
milliseconds
Required
500 milliseconds by default.
Exit FXO voice subscriber line
view quit -
Enter voice dial program view dial-program -
Create a POTS entity and
enter POTS entity view entity entity-number pots -
Bind one FXS voice subscriber
line to one FXO voice
subscriber line caller-permit calling-string Optional
By default, no calling number
is configured. That is,
incoming calls are not
restricted.
To do... Use the command... Remarks
To do... Use the command... Remarks...
Enter system view system-view -
Enter voice view voice-setup -
Enter voice subscriber line
view subscriber-line line-number -
Configure the cable type for
the E&M voice subscriber line em-phy-parm { 2-wire |
4-wire }
Required
4-wire by default.
To do... Use the command... Remarks
Enter system view system-view -
Enter voice view voice-setup -