Specifications

73Digital Key Bx, Digital 400 & Digital 1000 System Description
Figure 32 DIGITAL KEY BX and DIGITAL 400
system cabinets
The DIGITAL 400 system (see Figure 32) can be wall-
mounted or installed on a rolling base. Each cabinet
contains up to 15 printed circuit card slots and its own
power supply unit. The Main Processor card (MPD)
must be inserted into the first slot of the main cabinet.
All other cards may be allocated to any slot in any
cabinet.
The DIGITAL 1000 system consists of from one to
four card cabinets that are installed on a wheel-base.
Each DIGITAL 1000 card cabinet contains up to 15
printed circuit card slots for peripheral equipment cards,
a slot for the Driver card, a slot for an SPC module,
and a slot for a power rectifier unit (SREC).
The Main Processor card (MPD) of the DIGITAL
1000 system must be inserted into slot number one of
the main cabinet. If a second MPD card is used it must
be situated adjacent to the first MPD card. A DRV
(Driver) card is required in slot zero of every cabinet
of a multiple-cabinet configuration. All other cards
may be allocated to any slot in any cabinet.
POWER SUPPLY
A power supply unit slides into each cabinet. There is
a separate power supply for use in the six slot DIGITAL
KEY BX system, the 15 slot DIGITAL 400 system,
and the 15 slot DIGITAL 1000 system.
In the DIGITAL KEY BX system, the power supply
is located above the system cards.
In the DIGITAL 400 and DIGITAL 1000 systems,
the power supply is located to the right of the system
cards.
When configuring a DIGITAL 1000 system using
some DIGITAL 400 cabinets, the DIGITAL 1000
cabinets use the DIGITAL 1000 power supply, and
the DIGITAL 400 cabinets use the DIGITAL 400
power supply.
SYSTEM CARDS
All of the extension and outside line cards and the
option card, may be used in the DIGITAL KEY BX,
DIGITAL 400, or DIGITAL 1000 systems. There are
three MPD cards, one that supports up to 128 ports,
one that supports 384 ports and one for the DIGITAL
1000 cabinet. The MPD card that supports 128 ports
may be used in either the DIGITAL KEY BX or in a
single DIGITAL 400 cabinet, while the MPD card
that supports 384 ports may only be installed in the
DIGITAL 400 cabinet. The MPD for the DIGITAL
1000 system can only be installed in the DIGITAL
1000 cabinet. Each of these MPD cards requires either
a standard memory cartridge or an optional enhanced
memory cartridge with ACD capabilities.