2.21 Supporting Dva Operation - Comdial G0408 Manual

Digital Telephone System

2.21 Supporting DVA Operation

Digital voice announcing uses a hardware peripheral device (product code DVA01) connected to
a digital station port to play pre-recorded announcements and messages during an in-progress
call. The DVA stores the pre-recorded messages in its memory for recall when needed.
The DVA derives its operating power from the common equipment cabinet's digital station port;
however, the DVA also provides internal connections for a battery. When installed, this battery
powers memory that holds the stored messages should someone disconnect the DVA for some
reason. Should you need to replace this battery, use one that meets the following specifications:
• Output—8.4 volts, 100 mAh
• Type—Sealed, rechargeable Ni-Cad battery
• Model—Varta V7/8R or equivalent (Varta Batteries Inc., 300 Executive Blvd., Elmsford
NY 10523)
To install the DVA device,
1. Position the DVA01 in a convenient location.
2. Connect the DVA01 to a digital station port using an RJ14C-configured standard two-wire
line cord.
3. If you need to input pre-recorded messages during programming, use a customer-supplied
audio cable terminated with 3.5mm (1/8 inch) phone plug on one end and and appropriate
tape recorder mating connector on the other end.
4. Refer to Chapter 4 for details, and program the system for DVA operation.
2 – 78 Installing The DSU
IMI66–107