User Manual

AirLink Pro T1/E1 Rack Mount Installer’s Guide
Product Description
Rev. B - 1/97
1-6
AirLink Pro T1/E1 Rack Mount and are entered in the event queue. To report
alarms, attach a modem and dial-out to the maintenance center.
Using the terminal user interface, query either the local AirLink Pro T1/E1
Rack Mount or the remote AirLink Pro T1/E1 Rack Mount for status, performance
and alarm information, and make configuration changes for either the local or
remote end of the link.
The AirLink Pro T1/E1 Rack Mount also provides bit-error and loopback tests to
isolate problems. Initiate tests in the local AirLink Pro T1/E1 Rack Mount or in
the remote AirLink Pro T1/E1 Rack Mount through the terminal user interface.
Refer to Chapter 4, Operations and Maintenance, for information on monitoring
operation and using diagnostic tools and procedures.
T1/E1 Link Backup Capability
The T1/E1 link backup capability built into the AirLink Pro T1/E1 Rack Mount
enables an AirLink Pro T1/E1 Rack Mount pair to provide a parallel T1/E1
path (the RF link) to a standard T1/E1 line (see Figure 1-3).
Figure 1-3
A Point-to-Point Backup Link
Under normal operating conditions, the primary (protected) T1/E1 line is routed
to an external device such as a CSU through the AirLink Pro T1/E1 Rack Mount
and carries its normal T1/E1 traffic.
In the event of a fault in the primary T1/E1 link, each DSU/CSU generates a
relay control signal that is transmitted to the attached AirLink Pro T1/E1 Rack