Nortel Passport 15000 Hardware Installation And Maintenance page 552

552 Chapter 17 Hardware procedures
Procedure steps
241-1501-240 5.2S2
1 At the alarm/BITS module, plug the male D-sub connector of the cable
into the connector labelled J3.
2 Fasten the 2 small slotted screws of the D-sub connector to the
alarm/BITS module. Tighten to snug plus a 1/5 turn.
3 At the other end of the cable, plug the RJ-45 connector into the model 460
adapter. Press them together until the tab engages.
4 Fasten a coax cable to the output of the site timing source and route it to
the receive (Rx) coax connector on the model 460 adapter. Ensure that
there is enough slack to fasten the cable and adapter to structures with
tie-wraps.
5 Connect the coax cable to the adapter. Let the adapter hang freely or tie-
wrap it to the switch's mounting apparatus. Ensure that the adapter is
positioned out of the way from personnel or equipment passing at the rear
of the Passport.
6 Cover the transmit (Tx) coax connector on the model 460 adapter with
electrical tape. The Tx connection is not used for a Passport 20000.
7 Label the coax cable at the site BITS source to identify the switch
receiving the timing signal.
8 Use a line analyzer to determine the signal strength for the timing signals
at the J3 and J4 connections from the site source. The signal strength
must be within the range indicated in "Making a BITS cable" (page 635).
If each signal is not within the range, fix the problem between the point of
test and the site source. Depending on the length of cable from the site
source, you many need a thicker gauge cable to provide the signal
strength.
9 Repeat this procedure for the redundant timing setup. Connect the
second timing cable into the alarm/BITS connector labelled J4.