- used on public or
private, analogue or digital
telephone exchanges
- remote control over the
telephone line
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MZUV has
been designed for quick and expedient measurement of the
status of the line of the subscriber socket and for
testing the exchange input directly by the employee that
carries out a repair without the necessity to involve
other staff.
 The
choice of individual functions is carried out by means of
reliable telephone keys. Their arrangement is similar to
that of the measurement cabinet, that is used in the
present. Thus there is no need to retrain the staff in
transition to the use of MZUV.
MZUV is prepared to be fitted with the remote control
module, by means of which the mechanic may trigger,
through a usual telephone set, individual measurements
alone directly from the place of the repair in the field.
Advantages of the solution:
- modern compact solution
- control by telephone keys
- small dimensions
- high reliability
- pulse and frequency dialing
- digital and analogue meter
- high parameters stability
- control methods similar to that of the previous
equipment
- possibility to add a network power supply unit
- possibility to add remote control
FUNCTIONS
By means of MZUV, it is possible to carry out the
following tests and measurements on the subscriber socket
and on the line of the subscriber socket:
Measurement of internal lines
- Finding the voltage on a-wire
- Finding the voltage on b-wire
- Test of a-b wires, outgoing call
- Test of a-b wires, ringing, incoming call
Measurement of external lines
- Finding disturbing voltage on a-wire
- Finding disturbing voltage on b-wire
- Measurement of a-wire leakage against ground in
two ranges 2 MOhm, 20 MOhm
- Measurement of b-wire leakage against ground in
two ranges 2 MOhm, 20 MOhm
- Measurement of leakage between a-b wires in two
ranges 2 MOhm, 20 MOhm
- Orientation capacity measurement by means of
discharge
- Subscriber check by ringing tone
- Subscriber check by ringing tone on double socket
- Call with the subscriber
- Resistance measurement of the subscriber loop
with the telephone set
- Listening-in of a call
- Tapping (interconnecting to) a call
- Alarm- acoustic signaling into subscriber loop
- A-wire or b-wire identification
- Establishing a line break by means of discharge
- Signaling of the closure of subscriber loop-
optical
- Signaling of the closure of subscriber loop-
acoustic
In the mode of remote control measurement of
external lines
- Finding of disturbing voltage on a-wire
- Finding of disturbing voltage on b-wire
- Measurement of a-wire leakage against ground in
two ranges 2MOhm, 20MOhm
- Measurement of b-wire leakage against ground in
two ranges 2 MOhm, 20 MOhm
- Measurement of leakage between a-b wires in two
ranges 2 MOhm, 20 MOhm
- Subscriber check by ringing tone
- Subscriber check by ringing tone on double socket
- Measurement of resistance of subscriber loop with
telephone set
- Measurement of dialer
MECHANICAL DESIGN
The MZUV cabinet that has dimensions: width 270 mm,
height 260 mm, depth 120 mm, is manufactured from steel
sheet. The catches are adjusted so as to fit into the
SIEMENS MDF structure. According to customer wish,
catches may be delivered according to agreement.
| BASIC
TECHNICAL PARAMETERS |
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| power supply voltage |
44V to 66V d.c. |
| with added unit |
220V / 50Hz |
| consumption |
app. 10W |
| ringing voltage |
75Vef / 25Hz |
| power supply of subscriber loop |
20 to 60 mA |
| measurement equipment |
combined analogue and digital |
| measurement of disturbing voltage d.c., a.c |
0 to 199.9V |
| polarity discrimination of d.c. voltage, and
a.c. recognition input resistance |
> 1 MOhm |
| measurement of loop resistance |
0 to 1999 Ohm |
| measurement current |
25 mA |
| measurement of insulation resistance |
0 to 2MOhm, 0 to 20MOhm |
| measurement voltage |
100V |
| size |
app. 270 x 260 x 120mm |
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