Panasonic DBS Series Overview page 14

Panasonic Digital Business System - Overview
April 1997
SLT Ring Generator
Model Number: VB3687
The SLT Ring Generator provides ringing signals to analogue extensions. The ring signal is
50vAC into 500ohms or 80vAC into 10 kilo-ohms at 25Hz +/- 3 Hz.
Doorphone Interface
Model Number: VB3473
The Doorphone interface is used to link upto 2 doorphones and lock releases to the DBS. It is
an externally mounted unit, which links into ports on the DBS.
Doorphones
Model Number: VL568G / VL582A
The doorphones are connected to the doorphone interface. There is a small and large
version.
Meter Pulse Detection Card
Model Number: VB3667
The Meter Pulse Detection (MPD) card is a small daughter board installed into sockets on the
exchange line cards. One MPD card is required for each line where meter pulses are used.
The -48v Power Supply is required when MPD cards are used.
-48v Power Supply
Model Number: VB3697
The -48v Power Supply is used to provide the power for the MPD cards and E&M cards.
E&M Card
Model Number: VB3663
The E&M card provides three DC5 E&M circuit interfaces for use when linking the DBS to a
private network. When installed the -48v Power Supply is required to power the E&M card. It
can be installed into any LINE or universal slot except the first LINE1 in the DBS.
Max. Per CCU: 1
Max. Per VB3473: 2
Max. Per Line: 1
Max. Per CCU: 1
Max. Per DBS 38: 1
Max. Per Other CCU: 2
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