ADTRAN AOS Version R10.1.0 Command Reference Manual page 1919

Command Reference Guide
lbo
Use the lbo command to configure the line build out (LBO) for the T1 interface. Use the no form of this
command to return to the default value. Variations of this command include:
lbo short <value>
lbo long <value>
Syntax Description
long <value>
short <value>
Default Values
By default, the build out is set to 0 dB.
Command History
Release 1.1
Functional Notes
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 attenuation (-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
60000CRG0-35E
Configures the LBO (in dB) for T1 interfaces with cable lengths greater than
655 feet. Choose from -22.5, -15, -7.5, and 0 dB.
Configures the LBO (in feet) for T1 interfaces with cable lengths less than
655 feet. Range is 0 to 655 feet.
Command was introduced.
Copyright © 2012 ADTRAN, Inc.
T1 Interface Command Set
1919