Setting The Line Length; Configuring Signaling Mode - HP ProCurve Secure 7000dl Series Basic Management And Configuration Manual

Configuring the E1 + G.703 and T1 + DSX-1 Modules
Configuring the T1 + DSX-1 Module
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Setting the Line Length

The ProCurve Secure Router uses transmission line length to determine which
voltage to use for data transfer. The greater the distance between equipment,
the stronger the signal must be to counteract attenuation. You configure how
long the cable is, and the Secure Router OS establishes the proper signal level.
Enter:
Syntax: line-length [<0-655> | -7.5]
You can specify the length of the cable up to 655 feet, or you can fix the signal
output at -7.5 dB. Use the -7.5 setting to prevent the line becoming too hot.
Use the no command to return the line-length setting to its default setting
of 0 db.

Configuring Signaling Mode

Use the signaling-mode commands to control how the ProCurve Secure
Router transmits signaling information for traffic carried on the DSX-1 inter-
face. You use the following command to set the signaling mode:
Syntax: signaling-mode [message-oriented | none | robbed-bit]
Message-oriented signaling sets only channel 24 to clear channel signaling. In
other words, one channel is reserved for signaling data, and the other 23 carry
voice applications. Use this mode for QSIG installations. Enter:
ProCurve(config-t1 1/2)# signaling-mode message-oriented
Set the signaling-mode to none to configure all channels as clear channels.
Use this signaling-mode for data-only transmissions or for PBXs that use
Integrated Services Digital Network (ISDN) telephone equipment. To config-
ure the DSX-1 interface to use all channels as clear channels, enter:
ProCurve(config-t1 1/2)# signaling-mode none
The signaling-mode none command is different from the no signaling-
mode command, which returns the interface to the default setting of robbed-
bit signaling.
Robbed-bit signaling takes a bit from the extended frame to use for transmit-
ting signaling information. You should use this signaling mode when you want
to use your DSX-1 line for voice-over applications. Enter:
ProCurve(config-t1 1/2)# signaling-mode robbed-bit