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.
Summary of Contents for DBS 40
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