Pcb Placement Guidelines - Toshiba Strara CTX Series Installation And Maintenance Manual

Strata CTX Configuration

PCB Placement Guidelines

Install the RRCU PCBs in the Base Cabinet first. Station, line and option PCBs can be mixed in
cabinets in any pattern. Do not skip slots except for vacant slots that provide RPTU capacity. Also, do
not skip slots except for vacant slots that provide for BBKU/BDKS with Speaker OCA. Toshiba
recommends placing the RPTU and BDKU/BDKS PCBs first because they have special placement
rules. Use the following numbered sequence as a guide to installing the PCBs.
When placing PCBs, do not install more than five BDKU/BDKS PCBs in the same
CAUTION!
cabinet. Five BDKU/BDKS PCBs support 80 digital telephones, which brings the
cabinet power factor to 82.25. Adding more PCBs of any type to a cabinet that has
five BDKU/BDKS PCBs may cause the cabinet to exceed it's power factor (85 max.).
See "System Power Factor Check Considerations" on Page 1-27
Processor PCBs
Step 1:
BECU (Slot B101)/ BBCU (slot B102), are required for system operation. The BECU/BBCU will
support up to two cabinets without the BEXS/BBMS expansion subassemblies.
BEXS and BBMS subassembly PCBs are required for 3 to 7 cabinet systems or systems withe more
than 192 ports.
BSIS subassembly PCB is required for SMDR and/or SMDI or Toshiba Proprietary Voice Mail RS-
232 interface.
Note The BECU/BBCU is licensed for 64 ports and four DTMF receivers from the factory. If more
capacity is required additional licenses must be uploaded to the processor.
Remote Cabinet PCBs
Step 2:
RRCU PCBs installed in the main location can be placed in Base Cabinet slots S102~S108 in any
order. Before installing other PCBs make sure there is a Base Cabinet slot available for each
RRCU PCB needed. An RRCU may occupy a vacant slot adjacent to RPTU. An RRCU PCB in a
remote location can support one or two remote cabinets and can be installed in any slot of either
cabinet.
The number of RRCU PCBs required in the Base and Remote Cabinet locations is shown in
1-14:
Table 1-14 Main Processor PCB/ Remote Cabinet Configuration
RRCU PCBs
Needed in Base
Cabinet
1 1 or 2 Remote Cabinets in one location
2 2 to 4 Remote Cabinets in two locations or 3 to 4 Remote
cabinets in one location.
3 3 cabinets if cabinets are in separate remote locations.
4 4 cabinets if cabinets are in separate remote locations.
5 5 cabinets if cabinets are in separate remote locations.
6 6 cabinets if cabinets are in separate remote locations.
1-24
Remote Cabinet Configuration
Table
RRCU PCBs Needed at
Remote Location (s)
1
2
3
4
5
6
Strata CTX I&M September 2002