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Section 300-Installation Chapter 6. Double-Cabinet Systems
DBS-2.3/9.2-300 DBS Manual - Revised April 2000 6-3
Guidelines
• Two DBS cabinets can be connected to increase line size. The maximum
line size consists of two DBS 96 cabinets, which provide 192 ports.
• CPC-B and SCC-B are required for two-cabinet systems.
• If ground start or DID trunks are used in both cabinets, separate -48V
supplies must be supplied for each cabinet. If AECs are used in both
cabinets, separate SLT ringer boxes must be supplied for each cabinet.
• The following table shows the acceptable combinations of system types
Table 6-1. Trunk and extension port maximums for double-cabinet systems
• Figures 6-1 through 6-6 shows slot usage for two-cabinet combinations.
System
Combinations Trunk Extension Expansion Ports
Master Slave Ports Ports (Trunk lines or
extensions)
DBS 40 DBS 40 16 48 8 (See Note 1.)
DBS 72 DBS 40 24 72 0 (See Note 2.)
DBS 72 DBS 72 32 96 8 (See Note 1.)
DBS 96 DBS 40 32 88 16
DBS 96 DBS 72 40 112 16
DBS 96 DBS 96 48 128 16
Notes:
1. The slave cabinet must be used for expansion ports.
2. When a DBS72 and DBS40 are connected, expansion ports cannot be
used.