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Command Reference Guide T1 Interface Configuration Command Set

lbo <value>

Use the lbo command to set the line build out (in dB) for the T1 interface. 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

Command History

Release 1.1 Command was introduced

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. 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 -22.5

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