Nortel Passport 15000, Установка и обслуживание оборудования, Страница: 555 / 874

Chapter 17 Hardware procedures 555
Passport 15000, 20000 Hardware Installation, Maintenance, and Upgrade 5.2S2
If you currently have a site timing cable connected to J3 and J4, you can
use the existing timing cable by removing the DB9 connectors from the
cable assembly and stripping the wires back in order to terminate onto the
terminal block.
5 Remove the terminal cover from the wire-wrap terminal block. The cover
is shown in the figure “A timing cable assembly NTHW75” (page 557).
6 Using hook-up wire and a ring lug, jumper the shield pins S5, S8, S9, S11
together and connect to the frame stiffener. The pin designations are
labeled on the terminal block.
7 Strip back the timing cable approximately 15 cm (6 in.).
8 Route the timing cable into the terminal block.
9 Wire wrap the timing cable to the pins identified in the tables
• “Wiring pinout for J3 of cable assembly NTHW75” (page 555)
• “Wiring pinout for J4 of cable assembly NTHW75” (page 555)
Table 22
Wiring pinout for J3 of cable assembly NTHW75
Wire
wrap Wire color DB9
connector
A0329608 Description of
signal Termination
required?
T4 black 5 BITSRXBP BITS
I/F r(pos) yes
R4 black and red 9 BITSRXBN BITS
I/F receive -(neg) yes
Table 23
Wiring pinout for J4 of cable assembly NTHW75
Wire
wrap Wire color DB9 connector
A0329608 Description of
signal Termination
required?
T1 black 5 BITSRXAP BITS
I/F r(pos) yes
R1 black and red 9 BITSRXAN BITS
I/F receive -(neg) yes