DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4
June 1999
Hardware Configurations

2-5Carriers in Multi-Carrier Cabinets

2
Port Carrier (J58890BB)

Table 2-2 describes the func tion of each carrier slot.

Table 2-2. Port Carrier Circuit Pack Slots
Slot Name Circuit Pack Code Notes
POWER UNIT
(right side) Power Unit
(+5V) 649A Required for DC-powered systems. TRI
PLS OUTPUT DC-Powered
POWER
UNIT/
SERVICE
Power Unit,
Neon TN755B This position is addressed as “00” in
commands and displays. It does not
provide tip and ring to the wall field. The
following circuit packs are optional,
depending on system features. One
TN771D is required in all PPNs, and one
in each EPN of Critical Reliability systems.
Call Classifier TN744
Integrated
Announcement TN750
Speech
Synthesizer TN725B,
TN433,
TN457
Tone Detector TN748,
TN420B
Maintenance/
Test TN771D
TONE-
CLOCK 1 Tone-clock TN768
TN2182 Required as follows:
EPN with duplicated PNC: B carrier EPN
cabinet with two PNs: D carrier
E carrier of an EPN cabinet with two PNs
and duplicated PNC; the Tone-clock slot
is located with Port Slot #2. If the carrier
does not contain a Tone-Clock board, any
port board may b e installed in this slot.
EXPN INTFC
2Expansion
Interface TN570 Optional, depending on system’s
connectivity and duplication
configuration; if not used for an EI board,
this slot can accept any common port
board.
3 If the system’s connectivity and
duplication configuration require a
second EI on a port carrier, it resides in
this slot; otherwise, this slot accepts any
common port board.
4 to 20 Port Boards Any common port board.
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