Specifications

Personal Security Data Book | 105
• Connects a DP 6000
system to a PTT line
• Enables busy and absent
signalling between systems
• Compensates line
attenuation
• Absence signalling
• Allows for any type of
channel
Introduction
The modulator - demodulator (Modem) LBB 5907/00
has been designed for use in DP 6000 paging systems.
Intended for indoor use,the unit is housed in a beige
plastic cabinet, and is intended for wall or table-top
mounting. Four key holes are provided at the rear of the
unit for fixation against awall.
The unit couples a DP 6000 system to a PTT channel by
using a pair of modems. Two DP 6000 systems can be
connected to each other. Using additional pairs of
modems more systems can be connected.
When two systems are connected via a pair of modems
there will be engaged and absence signalling between
them. It is also possible to use the emergency interrupt
facility of the control desk to interrupt a transmission in
progress at the other site.
Synchronisation of the two systems via modems is not
possible. This is usually not even required because the
two systems will be at such a great distance that there is
no interference between them. Both systems however
may be individually synchronised.
Other DP 6000 features like call conversion and absence
conversion are possible.In certain system configurations
there may be limitations on these functions.
In multiple site coupling, absence control and conversion
may be restricted, depending on cable properties and
system layout.
LBB 5907/00
Modulator - Demodulator
Communication you can rely on