Avaya Communication Manager Administrator's Manual page 902

Screen Reference
Transmit LBO (Transmit Line Build-Out)
This field reduces the outgoing signal strength by a fixed amount. The appropriate level of loss
depends on the distance between your Communication Manager server (measured by cable
length from the smart jack) and the nearest repeater. Where another server/switch is at the end
of the circuit, as in campus environments, use the cable length between the 2 switches to select
the appropriate setting from the table below. This field appears if the Near-end CSU Type field
is integrated.
Valid entries
0db
-7.5db
-15db
-22.5db
Upon DTE LOS
DTE stands for "Data Terminal Equipment." This field tells Communication Manager what to do
if the outgoing signal from the DS1 circuit pack (the data terminal equipment) to the network is
lost.
Valid entries
loopback
ais
902 Administrator Guide for Avaya Communication Manager
Usage
For distances of 2,001 to 3,000 feet
For distances of 1,001 to 2,000
For distances of 0 to 1,000 feet
For mid-span repeaters
Usage
Enter loopback to return the network signal to the
network. This prevents any alarms from being
generated at the far-end
Enter ais (Alarm Indicator Signal) to send an unframed
all-ones signal (the AIS or Blue Alarm) to the far-end
server/switch. This option alerts your network service
provider to the problem immediately and aids in
troubleshooting.