User Manual

AirLink Pro T1/E1 Rack MountInstaller’s Guide
Operations and Maintenance
Rev. B - 1/97
4-18
Local Loop Test, Near End
The Local Loop test (Figure 4-8) sets a loopback at the T1/E1 interface of the
local (near end) radio unit and causes the T1/E1 signal to be returned to the
DTE. The AirLink Pro T1/E1 Rack Mount sends an unframed, all-ones Alarm
Indication Signal (AIS) toward the downstream (far end) AirLink Pro T1/E1
Rack Mount.
Figure 4-8
AirLink Pro T1/E1 Rack Mount in Local Loop Test, Near End
To start a local loopback, type the following command at the prompt:
AIRLINK PRO T1/E1> test loop local
The system prompts you to confirm the loop test:
AIRLINK PRO T1/E1> test loop local
WARNING: Start Local Loop test? (Y/N)
When you enter Y (yes) to confirm the request, the system starts the loop test.
OK
AIRLINK PRO T1/E1>
Site Name: Sunnyvale 2