Barge-In (Intrusion); Battery Back-Up (Memory); Battery Back-Up (System); Busy Lamp Field - Dss - Comdial DX-80 Installation & Maintenance Manual

Barge-In (Intrusion)

See Intrusion – Extension

Battery Back-Up (Memory)

The DX-80 system is equipped with a Lithium Ion battery for maintaining volatile system database programming and
extension programming during commercial AC power interruption. The memory back-up will maintain the database
programming, time and date displays, personal speed dial numbers, feature button programming, etc., for up to
seven (120) days of continuous AC power loss. When system AC power is restored, the system will resume normal
operation.
During AC power interruption, the system will not operate unless System Battery Back-Up via a UPS is equipped.
When the "Cold Start/Normal" option strap on the CPM Module is operated to the "Cold Start" position, with the KSU
AC power turned off, the memory back-up battery is removed from the volatile memory circuit. This option strap
condition is used only to initialize the system database and restore all programmable data to the factory configured
default program.
New DX-80 systems are shipped with the "Cold Start/Normal" option strap in the "Cold Start" position. When a new
DX-80 system is received this strap MUST be moved to the "Normal" position to allow system operation.
Note: We recommend that the system power be restored in a timely manner since the Lithium Ion battery is
not recharged. Continued discharging of the Lithium Ion battery will render the battery inoperable for the
intended purpose. Considering normal system use and periodic loss of commercial AC power, the Lithium
Ion battery life expectancy is 5 years. When necessary, replace with a like battery.

Battery Back-Up (System)

An external UPS (Uninterruptible Power Supply) (Optional) may be installed to connect between the KSU and a
dedicated 110VAC outlet. The approximate time, in back-up hours, will be determined by size (amp/hour rating) of
UPS installed. In the event of a commercial power outage, the UPS will provide the necessary system voltage to
allow full system operation until AC power is restored or the UPS battery voltage reaches minimum voltage
thresholds and is automatically disconnected to avoid battery damage.
The UPS system battery operation time is dependent on several factors:
•
Number of Digital key telephones installed
•
System traffic load
•
Age of external batteries
•
Equipment Room Temperature
•
UPS Amp/hour rating
•
Recovery time since last AC power interruption
For further information, see Specifications and Installation sections for more details about how to calculate the power
consumption of your DX-80 system application and apply this to the UPS requirement.
Busy Lamp Field – DSS
Depending on user requirements, any Programmable Feature Button can be programmed as a BLF button to monitor
an extension's status. When an extension is off hook the programmed BLF button LED for that extension lights red.
When that extension is in Do-Not-Disturb, the LED will flash red. This same button is used as a one-button Direct
Station Selection (DSS) call button for quick transfer of calls or intercom calling.
P7290 IMM
DX-80 I M
NSTALLATION AND AINTENANCE
3-34
M
ANUAL