
Command Reference Guide T1 Interface Configuration Command Set
61950860L1-35D © 2003 ADTRAN, Inc. 339
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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