Nortel Passport 7400, Установка оборудования, техническое обслуживание и устранение неисправностей, Страница: 297 / 438

Chapter 37 Hardware procedures 297
Passport 7400 Hardware Installation, Maintenance, and Upgrade 5.2S1
Procedure steps
1 Lay the wires from the timing source up to the connectors on the BITS
termination panel. Route the wires up or down the right side of the frame
against the cable management brackets.
2 Connect the wires at the timing source, using whatever method of
connection is required.
3 Label each timing wire pair at both end points to distinguish which is
reference 0 and which is reference 1.
4 Fasten the wires snugly with tie-wraps to whatever CPE wire support
system leads to the cable management brackets on the switch mounting
apparatus. Leave enough length at termination panel end of the wire to
attach the D-sub or coax connectors.
5 Assemble the cable with the appropriate connector. Refer to the pinout
tables below.
Procedure job aid
5 -7.5 db CSU
6 -15 db CSU
Table 5
Pinouts of the connectors for DS1 or E1 balanced
Pin DS1 for BITS-0 DS1 for BITS-1
1 no connection no connection
2 no connection no connection
3 GND (ground) GND (ground)
4 no connection no connection
5 BITSRX0P BITSRX1P
6 no connection no connection
7 no connection no connection
(Sheet 1 of 2)
Table 4 (continued)
Typical line build out application settings