The
Line Isolating Unit 3C provides high voltage isolation where analogue
telephone lines are delivered to sites such as high voltage electricity
sub-stations that are subject to a rise of earth potential.
Specifications
| Isolation |
20kV
AC |
 |
|
|
|
|
|
|
| Characteristics |
Impedance
BS complex |
Characteristics |
Impedance
BS complex |
| to
Line |
Input
volts 10 to 60V DC |
to
Equipment |
Open
circuit feed volts 50V DC |
|
Idle
current <200µA |
|
Off-hook
detect 8mA |
|
Active
current 8 to 50mA |
|
Ringing
volts o/c 50V RMS, 25Hz |
|
Ring
detect 30V, 25 to 50Hz |
|
|
|
|
|
|
| Direct
Exchange |
Loop
calling |
Insertion
loss |
Selectable
1dB or 3dB |
| Line
type and |
Earth
calling |
|
|
| features |
Prepay
payphone |
Frequency
response |
+/-
1dB 300 to 3300Hz |
|
50hz
meter pulses |
|
|
|
DTMF
dialling |
Speech
level |
0dBm |
|
Pulse
dialling |
|
|
|
|
|
|
| Power |
207
to 253V AC, 30mA max and/or |
|
|
|
-40
to - 60V DC, 80mA max |
Weight |
1
kg |
| Meets the
requirements of:- |
EMC Directive
89/336/EEC: emissions to BS EN 55022: 1998 class B, immunity to
BS EN 55024: 1998.
Low Voltage
Directive 73/23/EEC: safety to BS EN 60950: 1998
BT spec. D2966C
|
KENTON RESEARCH LIMITED
Unit 19, Bourne Industrial Park,
Crayford Kent DA1 4BZ
Tel: 01322 552000 Fax:
01322 552020
