Specifications

60 | Personal Security Data Book
Group calls
Each receiver in the system can be programmed to
respond to a group call. This can either be achieved by
preprogramming a number of receivers to respond to a
common call number, or by using the “ - “ key (decimal
group call). In the decimal group call the “ - “ key is used
instead of a call number digit and all receivers with a call
number digit of between 0 and 9 in that call number
location will be paged, i.e.entering 123 - will page
receivers 1230 to 1239.The “ - “ key can be used in up to
three locations,paging a maximum of 1000 receivers as a
decimal group call. This is a useful facility if it is
necessary to page fire fighting, first aid teams etc.
All call
Using a special address it is possible to page all receivers
in the system simultaneously.
Battery saving
Battery saving can be programmed into the desk.
With this facility, the receivers are in the off position until
a call is made to them.A preamble signal is automatically
transmitted before the call to switch the receiver on.
Depending of course on the traffic density, this facility
can extend the life of the receiver batteries by up to 5
times the normal battery life. This facility is not available
on first generation receivers.
Out of range
The desk is capable of sending an automatic warning
signal to inform the receiver holder that he/she has
crossed the limit of the transmitters range.
Direct calls
Up to 16 direct calls can be preprogrammed into the
desk. These calls can be transmitted by pressing the
DIRECT CALL key followed by one of the hexadecimal
keys. This call can be made to page a single receiver or
group of receivers and it can be followed by a
preprogrammed display message.
Remote contact calls
Up to 4 remote contacts (switches) can be connected to
the desk. These contacts can be used to monitor
equipment, doors etc., and when the contact is activated,
a call will be sent to a single receiver or group of
receivers. The call will be repeated (repeat time
programmable) as long as the remote contact is activated.
Alarm call
An ALARM key is included for direct transmission of a
preprogrammed call. This call can be made to page a
single receiver or group of receivers and it can be
followed by a preprogrammed display message.
Absence indication
If the system has receiver storage racks (connected to the
paging-bus), an absence signal can be sent to the desk
from the rack if an attempt is made to page a receiver
which has been placed in the rack. If a group call is
transmitted and a receiver which is part of the group is in
the rack, the absence signal will not be sent.
Absence and permanent conversion
The desk can be programmed with an absence and
permanent conversion facility whereby, in the absence
conversion mode,if a call is made to a receiver which is
in the rack, the call will automatically be transferred to a
second receiver. This is useful,if say, a consultant is on
holiday and all calls must go to his deputy. In the
permanent conversion mode, one of the receiver call
numbers is changed in the desk so that if the receiver is
called, the desk will automatically transmit the changed
number. This facility could be used e.g. if a receiver
holder is using a spare receiver whilst his own is out of
order.
Back up battery
When there is no power supply to the desk, a nickel
cadmium back up battery will retain all the
preprogrammed information in the memory for at least
1000 hours. The battery will be recharged automatically
as soon as the desk is connected to a power supply.