Expansion Cabinet (Vb-44021); Cabinet Power Supply (Vb-44022); Battery Backup (Vb-44025); Switch Box (Vb-44023) - Panasonic DBS 576 Technical Manual

Section 200 general description

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The Base Cabinet

Expansion Cabinet (VB-44021)

Each added Expansion cabinet expands the system capability by an additional 96 ports. One or two

Expansion cabinets can be installed on top of a Base cabinet. Up to four Expansion cabinets can be

installed in a fully equipped, 6-cabinet system.

Multiple slot types are used in the Expansion cabinet. These slot types are as follows:

Slot type

Power slot

CPC slot

Flexible slots

Option slots

NOTE: Optional backup batteries can be installed for system operation in the event of a power failure.

–48V Cabinet Power Supply (VB-44022)

A –48V power supply must be installed in a cabinet when either DID, E&M and/or Ground Start

Trunks are employed in the cabinet. The –48v power supply is "shelf-sensitive," meaning any cabinet

which holds either DID, E&M, and/or Ground-Start trunk cards must have its own –48v power supply.

The backup batteries supply power to the system in the event of a power failure. If the Battery

Backup option is chosen for the system, each cabinet requires its own set of batteries (1 kit per

cabinet, 2 batteries per kit). The batteries can back up the system for up to 30 minutes.

The Switch Box installs in the Base cabinet, and controls power for the Base cabinet and up to 2

Expansion cabinet(s) installed above it. When the power supply is turned on or off in the Base

cabinet, power is also turned on or off for the Expansion cabinet(s).

# of slots

Unit type to be installed

For the cabinet power supply (which comes installed in the cabinet).

For the cable expansion interconnection card.

For trunk cards, station cards, and other circuit cards.

For optional cards such as MFR/8.

Chapter 2 - System Hardware

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