Specifications

Personal Security Data Book | 119
19. CALLS MADE VIA A PABX TO AN ALPHADESK
MUST BE REPEATED UNTIL RECEIVED
Application: NSO SWITZERLAND
System: LBB 6000.
Problem: A call made via a PABX to an alphadesk
is only made once, i.e. the RS232
protocol string from the PABX to the
alphadesk is only transmitted once.
Requirement: A call made from a PABX to an
alphadesk should be repeated until the
call is accepted.
Solution
Using a special software module, a call made from a
telephone central (PABX) to an alphadesk includes a call-
string ‘Pager Start’which is repeated by the alphadesk
until the ‘Pager Stop’ message is received.The repetition
interval is programmable (e.g. every 20 seconds).
20. DISPLAY INTERNATIONAL CHARACTERS
Application: NSO DENMARK
System: LBB 6503.
Problem: For use in different countries, receivers
are limited to the choice of international
characters that they can display.
Requirement: To convert international characters
initiated from a Fire Alarm system for
display on the system pagers.
Solution
Using a special software module, international character
code sets generated from a ‘black-box’(e.g. fire alarm
system) can now be converted for viewing on called
receivers. In this example, the paging system is connected
to a Fire Alarm System using its RS232 capability. The fire
alarm system generates Danish characters which are not
available within the international character set of the
receivers. Therefore, if the alarm system generates an
alarm with the Danish character (e.g Æ ) the alphadesk
converts this to AE., which can then be displayed on the
alphanumeric receivers.