User Manual

AirLink Pro T1/E1 Rack Mount Installer’s Guide
Installation and System Administration
Rev. B - 1/97
2-17
Figure 2-8
Two-Wire Order Wire Connection
Order Wire communication can only occur when there is an active radio link
between the local and remote AirLink Pro T1/E1 Rack Mount units and the RSQ
is 6 or higher. Communication across the order wire interface is initiated by
picking up the telephone at either end of the link. When the RSQ is below 6,
the AirLink Pro T1/E1 Rack Mount software mutes the order wire. Picking up
the order-wire telephone causes an audible tone (beeping ) at the remote
Airlink Pro T1/E1 Rack Mount. This tone continues until the telephone at the
remote end is picked up.
An external order wire unit can be connected to the designated terminal block on
the rear panel. When an external 4 wire interface is used, the order wire unit
provides its own signaling. The 4-wire interface allows multiple T1/E1 units at
a hub to be connected through a 4-way or 8-way 4-wire bridge (Figure 2-11).
Connect the input pair of the order wire to the T & R located on the ORDER
WIRE terminal block and connect the output pair to the T1 & R1.
Set the external order wire to transmit and receive at 0 dBm. The type of order
wire interface (2 or 4-wire) is selected from the Command Line Interface
Configuration screen. (See “Setting Link Parameters” in Chapter 3,
Configuration).