Nortel Passport 15000, Установка и обслуживание оборудования, Страница: 249 / 874

Chapter 17 Hardware procedures 249
Passport 15000, 20000 Hardware Installation, Maintenance, and Upgrade 5.2S2
Assembling sparing panel NTQS31
Assemble an NTQS31 sparing panel prior to installing the panel on a frame.
Prerequisites
• A sparing panel with PEC NTQS31 may arrive unassembled in these
main parts:
— NTHR37 for the sparing panel module
— NTHR39 for the sparing panel relay module, one relay per DS3 or
E3 port that will be connected to the panel
— NTHR42 for the sparing panel control module
Procedure steps
1 On the sparing panel module (NTHRU37), unfasten the 2 captive screws
by hand and put them aside for re-use.
2 Lift the front panel cover off the chassis and put the cover aside for re-use.
3 Insert the control module (NTHR42) into the leftmost slot and press in the
retention studs in the module guides. The control module mates with the
panel in only one slot.
4 Insert the relay modules (NTHR39) into the remaining slots, ensuring
each is held in position by the retention studs. A relay module will not fit
in the slot for the control module. Use 1 relay per DS3 or E3 port.
5 Place the panel cover back onto the sparing panel.
6 Align the 2 captive screws and fasten them by hand to snug plus a 1/5
turn. Do not overtighten because the panel will not operate properly.
7 The assembled result should look like the figure “A 12-port DS3 or E3
one-for-six sparing panel NTQS31, fully assembled” (page 250).