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SROS Command Line Interface Reference Guide T1 Interface Configuration Command Set

lbo long <value>

Use the lbo long command to set the line build out (in dB) for T1 interfaces with cable length greater than

655 ft. Use the no form of this command to return to the default value

Syntax Description

<value> Configures the line build out for the T1 interface

Valid options include: 0, -7.5, -15, and -22.5 dB

Default Values

<value> 0 dB

Command Modes

(config-t1 1/1)# T1 Interface Configuration Mode required

Functional Notes

Line build out (LBO) is artificial attenuation of a T1 output signal to simulate a degraded signal. This is

useful to avoid overdriving a receiver’s circuits. The shorter the distance between T1 equipment

(measured in cable length), the greater the attenuation value. Use the two line build out commands

(lbo long and lbo short) to customize the attenuation based on the cable length. For example, two units in

close proximity should be configured for the maximum attention (-22.5 dB).

Usage Examples

The following example configures the T1 interface LBO for -22.5 dB:

(config)#interface t1 1/1

(config-t1 1/1)#lbo long -22.5

1 2 ... 504 505 506 507 508 509 510 511 512 513 514 ... 940 941

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HP 7000 dl Router Series Guida Utente Pagina 509

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