Specifications

12
Installation
The battery backup requires four (4) AA size nickel cad-
mium (NiCd) batteries, with an amp-hour rating of 450
mAhr or higher. To install the batteries, remove the four
screws that secure the cover of the unit. Use needle nose
pliers to carefully squeeze in the locking tabs on the four
plastic standoffs that mount the PPC board. Gently pull
the board off of each of the standoffs and place it aside.
Insert the 4 batteries as shown on the battery holder.
Check that the battery clip is securely attached to the bat-
tery holder. Align the main PC board with the 4 standoffs
and carefully press the board until all 4 standoffs latch.
Replace the cover and mount the unit.
Charging
New batteries should be fully charged before using the
battery backup feature. The ZPM3 provides a constant
trickle charge which will fully charge batteries in approxi-
mately 48 hours (batteries should last 5-7 years). A green
LED illuminates to indicate that the charging system is
operative; it does not indicate the condition of the batteries.
No damage will occur to the ZPM3 or the batteries if there
should be a power outage during this initial charging
period, but the integrity of the programmed features
cannot be guaranteed. Remove all power before replac-
ing batteries. Once the batteries have been removed,
user-programmed features are erased.
NOTE: Batteries should be disconnected if the ZPM3 is to be
left unpowered for more than one day.
Resetting the Battery Backup
If for some reason, such as extended power outages, it
should become necessary to reset the ZPM3, do the fol-
lowing. Unplug the 24V power supply to remove the pri-
mary power. Locate the battery backup reset access hole
at the top left of the unit. Using a suitable screwdriver,
press the small black button next to the green LED. Plug
the power supply back in and re-program the user features.
Paging a Zone
Access the ZPM3 by dialing the trunk access number or
station access number. Listen for the confirmation tone
(if enabled). Dial the number of the zones desired (1 to 3).
Paging All Zones (All-Call)
Access the ZPM3 by dialing the trunk access number or station
access number. Listen for the confirmation tone (if enabled).
Dial (0) for All-Call.
Paging a Zone Group
Access the ZPM3 by dialing the trunk access number or
station access number. Listen for the confirmation tone (if
enabled). Dial (*) (1) for zone group 1 (*) (2) for zone group
2 or (*) (3) for zone group 3.
NOTE: Zone Groups 4 (Night Bell Zone Group) and 5 (Shift
Change/Emergency Call Zone Group) cannot be accessed
through the telephone. These groups are only activated by the
night bell and shift change/emergency call features respectively.
Battery Backup System Operation