Auxiliary Station Ringer Interface; Battery Backup Interface - Comdial DXP Plus Manual

GCA40–130

Auxiliary Station Ringer Interface

The central processor unit circuit board includes four dry-contact relay actuations. They may be used for
the following:
•
Programmable Station Ringer Interface
•
Paging Enable
•
Door Relay Lock/Unlock
•
Zone Night Answer
The relay contacts for the station ringer interface follows the ring pattern of a ringing line or telephone.
These relay contacts close during ringing and open between rings and may be used to control an external
signaling device. The relay contacts for the paging enable and door relay are closed while the activating
station is off-hook and may be used to provide a path for an enabling signal where needed. Contacts on
relay 1 is normally closed when idle and contacts on relays 2, 3, and 4 are normally open when idle.
Also refer to the discussions titled Common Audible Ringer Interface, External Paging Interface, Flexible
Ringing Assignments, Line Answer From Any Station, and Night Transfer (Of Ringing).
B
Background Music (Two Selections)
If the system includes an external music source, telephone users can turn background music on and off at
their stations. The system uses two dedicated audio ports to interface the music sources, one for
background music through the station speakers and the other for music on hold for both lines and
intercom numbers. Therefore, the background music can be different from the music provided to held
calls if the system installer connects two different sources to the system. When the two different choices
are available, station users can dial a code to choose either source for their background music.
Also refer to the discussions titled Music Interface and Music On Hold.
Battery Back-Up (Chassis, Cable, and Batteries)
Battery back-up assemblies that include chassis, cable, and battery are available as optional kits (through
normal distribution from Comdial). The battery back-up assembly connects directly to the battery
interface connector on the system main power supply.

Battery Backup Interface

Attach a Comdial-provided optional battery backup kit to the DXP Plus digital communications system
for full un-interruptable system power in case of an AC power loss. The switching and trickle charge
circuitry are in the common equipment power supply assembly, but batteries, chassis, and cable are
packaged as a separate option. When the installer plugs the system into an active AC power source, the
common equipment power supply will constantly charge the attached batteries with a trickle current.
Built-in circuitry automatically switches to battery power when AC power is lost. With batteries at full
charge, a fully loaded system (without expansion cabinets) will remain fully functional for a minimum of
one hour without AC power.
If additional time is required, the backup time can be increased by adding additional batteries.
54 – Understanding The Features
DXP Plus General Description