Specifications

Personal Security Data Book |93
• Programmed options for:
- speech
- 5-digit display
- “meet me” via PABX
- Control tones
• Memory back-up against power
failure
• Suitable for most PABXs -
touch-tone or rotary dial
• Can be connected to special
interface or extension line
• Simple programming
• Complete microprocessor control
• Option for talk-back and talk-
through
Introduction
The Bosch LBB 5845 microprocessor-controlled coupler
has been designed as an interface between almost any
PABX and a Bosch DP6000 Digital Paging System.
The coupler allows people carrying DP6000 receivers or
transceivers to be paged directly from internal telephone
sets.
Operation
After the caller has selected a prefix on the telephone, he
will hear the free tone. When the free tone is heard, the
caller may dial another prefix to indicate the method of
communication: speech,“meet me”or digital display.
If the coupler is preset for only one mode of operation,
there is no need for a prefix.The caller then dials the
receiver number, and if required, the code for the call
tone and the digits to be displayed on the receiver.
When the call is transmitted, the caller will hear the
transmission tone. If the called receiver was in the storage
rack, the absent tone will be sent to the caller and the
connection will be interrupted.
When set for the speech mode, the coupler will switch to
the speech mode and speech will be possible for a time
depending on the programming of the coupler.
Depending on traffic density, the speech time may vary
from 20 to 60 seconds.
When talk back is required the coupler can be extended
with the talk back unit LBB 5845/01. The unit consists of
a printed circuit board and cable fitted with a 16 pole
Hirschman plug, and should be mounted in the coupler
housing.
Speech, talk back, and talk through will be possible
during the time set in the coupler.When the squelch of
the talk back receiver is active,the telephone coupler will
switch the audio from the talk back receiver to the
telephone line.
With the 5-digit programme, the call is transmitted and
the coupler resets immediately.
The address to be called can be of one to four digits.
Depending on the requirements,a digit has to be dialled
after the address digits to determine the call tone.
LBB 5845/00
Telephone Coupler
Communication you can rely on