Instruction manual

Strata DK424i
Processor PCBs
20 Strata DK General Description 6/00
Processor PCBs
The system operates with one of four processors (B1CU, B2CAU/B2CBU, B3CAU/B3CBU, or
B5CAU/B5CBU). These processors can only be installed in dedicated slots in the Base Cabinet
(slots B101 and B102).
♦ The B1CU unit consists of a single PCB. The B1CU processor supports only the DK424i Base
Cabinet with up to eight universal slots.
♦ B2CAU/B2CBU consists of two PCBs that support up to two cabinets, with up to 14 universal
slots. Expansion Cabinet slots S207~S210 are not available with the B2CAU/B2CBU
processors.
♦ B3CAU/B3CBU consists of two PCBs that support up to three cabinets, with up to 28
universal slots.
♦ B5CAU/B5CBU consists of two PCBs that supports up to five cabinets, with up to 48
universal slots.
Each processor provides a MOH/BGM source interface, and connectors to mount optional DTMF
receiver PCBs required for some CO line types and peripherals, as described below. Each
processor provides an interface for connecting an optional feature key (RKYS) as described below.
B3CAU/B3CBU and B5CAU/B5CBU require a remote maintenance PCB, usually installed in slot
S101; the remote maintenance PCB is optional for the B1CU and B2CAU/B2CBU. All
configurations shown in this document assume this PCB is installed.
Table 11 lists the clock speed and available chips and memory for each processor.
Processor PCB Subassemblies
Subassemblies required for some features can be added to the processor PCBs. Also see
“Summary of PCBs and Subassemblies” on Page 45.
DTMF Receiver Subassembly (BRCS)
The BRCS is required to translate DTMF tones needed for DISA, Tie/DID/Dialed Number
Identification Service (DNIS)/Automatic Number Identification (ANI) lines, voice mail, AA
announcement devices, DTMF standard telephones, and other devices to data signals for the
system.
The BRCS can be attached to the processor and is available with either 4, 8, or 12 (BRCS-4, -8 or
-12) shared receiver circuits. See Table 38 on Page 95 for more information.
Table 11 Strata DK424i Processors and Memory
Cabinets B1CU B2CAU/B2CBU B3CAU/B3CBU B5CAU/B5CBU
Main CPU
68000
(8.192 MHz)
68000
(16.384 MHz)
68000
(16.384 MHz)
68EC020
(16.0 MHz)
Sub-CPU
TMP90C802-4011
x 1 (10MHz)
TMP90C802-4011
x 2 (10MHz)
TMP90C802-4011
x 3 (10MHz)
TMP90C802-4011
x 5 (10MHz)
Program Memory
2MB (4MB x 2)
EPROM
2MB (4MB x 4)
EPROM
2MB (4MB x 4)
EPROM
2 MB (4MB x 4)
Flash Memory
RAM 1MB (4MB x 2) 21MB (4MB x 4) 2MB (4Mb x 4)
2.5MB (4MB x
4 + 1MB x 4)