3-26 Installation
2-Mb/s Remote Peripheral Equipment Appendix 1 to 553-2741-200
—continued—
C h a r t 3 - 2 ( c o n t i n u e d )
QSD66 or QSD74 expansion in a QCA146 RPE cabinet
S t e p P r o c e d u r e
19 If QUD24 cooling units are required, install as described in
Chart 2-6. If cooling units are not required, reinstall the
louvered top assembly on top of the new shelf and secure with six
screws through the top.
20 If shelf being installed is a QSD74 shelf, install and connect two
75-ohm coaxial cables from the connectors at the rear of the RPE
shelf (Figure 2-4) to Line Terminal Units (LTUs) for each loop.
21 If shelf being installed is a QSD74 shelf, install and connect
cable for customer defined alarms to alarm cable connector on
RPE shelf backplane (Figure 2-4). Refer to 553-2741-200 (X08)
or
553-2931-200 (X11 Supplementary Features) for connection
information.
22 If shelf being installed is a QSD74 shelf, ensure that the circuit
packs are in their assigned position in the RPE shelf (Figure 2-5).
Note:
Three Bus Terminating Units (BTUs) are required in
the RPE shelf. At the remote end, QPC477A23 BTU are
installed from the front of the RPE shelf in the connectors
located between positions 3 and 4, 6 and 7, 9 and 10.
23 If this is an operating cabinet, set the CAB INP breaker on the
QUX19 unit to ON to restore service to the cabinet.
24 Install circuit packs in assigned positions in new shelf
(Figure 2-5).
