Background Music - Comdial DSU II System Manual

DSU II Digital Telephone System
B

Background Music

If the installer connects a customer-provided external music source to the system, the
music from that source will sound through the station loudspeakers after the users turn it
on at their stations. They can adjust the loudness of this background music with the
loudspeaker volume control. The system automatically turns the background music off
during calls. This feature requires no class of service programming.
See also, Music Features.
Basic Key Service (1A2) Emulation
The system provides all of the basic, 1A2-type, key service features. These features are:
selective line pickup, common line pickup, multiline pickup, and hold. No special class
of service programming is required.
Battery Back-Up
Battery Back-Up (Chassis, Cable, And Batteries)
The manufacturer offers battery back-up assemblies including chassis, cable, fuses, and
batteries as optional kits available through normal distribution channels. The assemblies
are designed so that installers can connect them directly to the uninterruptable power
source (UPS) interface located on the common equipment chassis. The system does not
require any action from the telephone user to make it operate on battery power nor does it
require any class of service programming action on the programmer's part.
Battery Back-Up Interface
The common equipment cabinet provides an interface for an optional battery back-up kit
to give full uninterrupted system power in case of an AC power loss. The switching and
charge circuitry are in the common equipment, while the batteries, chassis, and cable are
packaged as a separate option. When plugged into an active AC power source the
common equipment will constantly charge the attached batteries. Built-in circuitry
automatically switches to battery power when AC power is lost. With batteries at full
charge, a fully loaded system will operate for a minimum of one hour without AC power.
Digital Telephone System Features A – 9
IMI66–132