Instruction manual

Strata DK424i
Maximum Station/Line Capacities
22 Strata DK General Description 6/00
Expansion Cabinets
Expansion cabinets can be added to increase station and CO line capacity of systems that allow
multiple cabinets. Figure 11 shows an example of the interior of an expansion cabinet.
Refer to the following section for station/line capacities. Table 13 shows the number of stations
and lines allowed when additional cabinets and PCBs are used.
Printed Circuit Boards (PCBs)
PCBs are installed in the cabinets to provide interface for stations, lines, and peripherals. Each
PCB measures 7.5 x 5.5 inches (190 x 140 mm) and mounts in the slot with a 44-pin backplane
connector. PCB external connections to station equipment are made to the Main Distribution
Frame (MDF) using industry-standard connectors. Also see Chapter 4 – Universal Slot PCBs.
Maximum Station/Line Capacities
Attaining maximum system capacities depends on power consumption of a particular
configuration. Configurations for a fully expanded system can range from 200 lines or 336
stations. All capacity configurations shown below assume one slot contains an eight circuit station
PCB and one universal slot is reserved for an optional External Page/Maintenance PCB.
A summary of the maximum number of lines and stations by processor is shown in Table 13.
Table 13 Strata DK424i Maximum Capacities
Cabinets B1CU B2CAU/B2CBU B3CAU/B3CBU B5CAU/B5CBU
Maximum CO Lines 32 104 120 200
Maximum Stations 56 112 192 336
Stations + Analog Lines 56 or 64* 104 or 112* 216 376
Stations + T1 &/or PRI Lines 64 128 248 432
* Configuration numbers marked with a * do not include a slot for the Remote Maintnenace PCB. All other
configurations (without an *) assume that a slot is provided for the Remote Maintenance PCB.
S_01 S_02 S_03 S_04 S_05 S_06 S_07 S_08 S_09 S_10
5003
CABINET NO.
2
S_01 S_02 S_03 S_04 S_05
S_06 S_07 S_08 S_09 S_10
34567
POW
+5V
-5V
P. F.
RESET
EXP
BASE
AC IN
AC IN
DC OUT
-27V1
-27V2
-27V3
-27V4
+
-
POWER
ON
OFF
FG
5002
POW
+5V
-5V
P. F.
RESET
EXP
BASE
AC IN
BATT
DC OUT
-27V1
-27V2
-27V3
-27V4
+
-
POWER
ON
OFF
FG
5002
Figure 11 DK424i Expansion Cabinet Interior