Specifications

94 | Personal Security Data Book
This digit can also be left out and preprogrammed.
For transmission of internal telephone numbers, up to 5
digits can be selected. Non-required places can be filled
with preprogrammed information.
Programming:
The programming should be done by means of a rotary
dial selector telephone set,to be connected directly to the
programming input of the coupler.
The coupler’s memory is protected with a back-up
battery to prevent loss during mains failure.
Connection to the telephone system.
The coupler accepts loop disconnect output of the PABX
(selector dial system),with or without ringing current.If
the PABX uses touch tone selection (DTMF), the coupler
must be equipped with a touch tone detector LBB 5841/05.
The coupler can also be connected to an unmodified
extension line for which a ringing current and click
detector have been builtin.
TECHNICAL SPECIFICATIONS
Coupler LBB 5845/00
Power supply: 11 - 14 V
Current consumption:
stand-by mode: 200 mA
full operational mode: 375 mA
Output line level:
code transmission: -1,8 V
transmitter on: > -19 V
transmitter off: < -28 V
Code output level: 2,2 Vpp
Speech output level: 0 dBm
Output impedance: 30 Ohm
Input loop current: 10 to 66 mA
Input impedance: 500 to 700 Ohm
Ringing current frequency: 10 to 20 Hz
Ringing current amplitude: 23 to 36 dBm
Input speech level: 0 dBm
Input DTMF level: -12 to 0 dBm
Signal tone range: 422 to 1082 Hz
Talk back print LBB 5845/01
Power supply: via telephone coupler
Current consumption: 65 mA
Audio output level: 0 dBm +/-0,5 dB
(1000Hz)
DTMF decoder LBB 5841/05
Acceptable twist
(high tone/low tone): -8 to -4 dB
Detection time: 20 to 40 msec.
Pause time: 25 to 40 msec.
Noise tolerance: -12 dB
Dial tone tolerance: 0 dB
Input impedance: 100 kOhm
ENVIRONMENTAL
Temperature range
operating: 0
0
C to +55
0
C
storage : -40
0
C to +70
0
C
Relative humidity: <95%
Operating conditions: stationary
Susceptibility to radiation: in an E.M. field of 1 V/m
(100 kHz to 1000 MHz)
the coupler complies
with the specification
Safety: according to IEC 65
Pollution: according to CISPRE/CENELEC
specifications, cat II (VDE 871 class B)
Dutch PTT TD 280, German FTZ VDE
0875, Stîrgrad N
MTBF: 50.000 hours
Dimensions: 24 x 19 x 5 cm
Weight: approx. 0,8 kg
Bosch Security Systems B.V.
www.boschsecuritysystems.com
9498 973 06414 01-1 | Printed in The Netherlands | Januari 2004 • Data subject to change without notice