AT&T DEFINITY 555-230-223 User Manual
Page 27
Installation
For the same reason, do not cycle the power on the switch (for example,
during switch acceptance tests) once the system assembly is inserted
unless you have first shut down the DEFINITY LAN Gateway system. Refer
to the maintenance screens in Chapter 3 for the shutdown procedure.
Slot and Carrier Restrictions
If rearrangement of circuit packs in the PBX is required to accommodate the
system assembly, rearrange the packs as indicated on Worksheet A-2, Port Slot
Assignments, before proceeding.
There is a maximum of one system assembly per Single Carrier Cabinet (SCC)
or MultiCarrier Cabinet (MCC). This assembly occupies five slots and should be
placed to the far right in the carrier. For thermal reasons, the system assembly
should not be placed in MultiCarrier Cabinet C carrier position (top carrier
position).
See Appendix A, ‘‘PBX Carrier Configuration Worksheets,’’ for detailed
information on the rearrangement of circuit packs and slot restrictions.
DEFINITY LAN Gateway System Slots
The system assembly requires five contiguous port slots in the switch carrier. In
this description, the five slots are referred to as the first through the fifth slot, with
the understanding that they can be any five contiguous port slots. It is
recommended that it be installed as far to the right as possible.
The slots are numbered from left to right on the front panel of the switch cabinet,
and from right to left on the rear panel as shown in Figure 2-3, Connecting the
Adapter Cables, Rear-Panel View. The five port slots are occupied by the
DEFINITY LAN Gateway system assembly as follows:
The first and second slots are covered by the DEFINITY LAN Gateway
disk and removable media and are not connected to the switch backplane
or amphenol connectors.
The third slot is connected to the Alarm Board (ALB).
The fourth slot is connected to the Multi-Function Board.
The fifth slot remains vacant to provide added clearance and cooling for
certain components on the Multi-Function Board.
2-8
Issue 1 January 1996