CS196048B1 - Connection of the passive system - Google Patents

Description

The invention relates to the connection of a passive assembly, intended in particular for an automatic tester of operating parameters of long-distance telephone circuits.

The so-called automatic subscribers are usually used to measure the operational parameters of the long-range telephone circuits of the medium-level exchanges. The call center is called by the automatic subscriber located at the end of the telephone circuits. The automatic subscriber toggles the measurement generators and meters of selected operating parameters according to a predetermined program. These signals are received, evaluated and recorded by the measuring technician at the measuring center.

The current disadvantage of measuring operating parameters by an automatic subscriber is that it can usually send only measurement signals and requires manual operation. Although automatic operating parameter meters are known, these are not suitable because they only allow measurements at low operating loads.

These previous drawbacks are eliminated by the connection of a passive set, intended especially for the automatic tester of operating parameters of the long-distance telephone circuits, whose essence is that the circuit of the toggle switch is connected through the first filter and the first input circuit to the double wire terminal. a four-wire, two-wire terminal and an ee four-wire terminal, while the input switch circuit output is connected by a function switch circuit that is connected to both the level meter and the sum meter,

196 048

198 048 on the one hand and the generator circuit and with the encoder and the memory connected and the level meter and the noise meter.

The main advantage of the connection according to the invention is the possibility of setting automatic proyozu to measure the required parameters of telephone circuits in any order. The wiring enables to obtain numerical information in automatic reverse transmission over the measured circuit.

An exemplary circuit according to the invention is shown in the drawing, which is a block diagram of the circuit. ,

The block diagram starts with the input terminals. The two-wire terminal 2 is connected through the first input circuit 6 and the first filter 2b by the input switch circuit% and the associated two-wire terminal. The four-wire terminal 4 is identically connected through the second input circuit 6 and the second filter 8 and with it the associated four-wire terminal J. The output of the toggle switch circuit 18 is coupled to the function switch circuit 10 to which the generator circuit 12 is connected, as well as the memory encoder 11, connected to the level meter 13 and the sum meter 14, both connected to the function switch circuit 10.

The two input circuits 6 and 6 essentially comprise a translator and a power bridge. The filters 2 * are essentially diode limiters as required and a choke. The circumference switch circuit Jg is formed, for example, by a relay circuit controlled by input c-wires. The function switch circuit 10 consists of a shift register that controls the I / O relay circuits. The memory encoder 11 is formed by logic circuits. The circuit 12 of generators consists of low-frequency oscillators of, for example, 400, 800, 2 800 Hz and multi-frequency code generators for synchronizing and returning measurement results.

The passive set can be connected either to terminal 2 of two wires and terminal 1 in two wires, or to terminal 4 of four wires and terminal 3, in four wires. The determining criterion of whether the measurement will be made in two or four wires is given by a signal to one of the terminals 1, J. This initial signal connects the respective branch at the respective terminal 2 or £ with this signal, a switch circuit 10 is activated which alternately connects a generator circuit 12, a noise meter 14, a level meter 13 and a coder 11 with memory, according to the set program. The measurement generators of the generator circuit 12 are coupled when measuring the level of the outgoing direction relative to the passive assembly. The level meter 13 and the sum meter 14 are connected according to the program for measuring attenuation and sum in the incoming direction relative to the passive set. The information obtained from the level meter 13 and the sum meter 14 is stored from measurement to the time of retransmission in the steam units of the memory encoder 11e. According to the program, this information is transmitted in the specified code via the function switch circuit 10 and the input switch circuit 8 to either the two-wire terminal 2 or the four-wire terminal 6 as previously determined.

The connection is advantageous especially for apojing technology in railway transport and other connection traction is advantageously used in telephone exchanges.

Claims (1)

Connection of a passive assembly, intended especially for an automatic tester of operating parameters of the long-distance telephone circuits, characterized in that the input switch circuit (9) is connected via the first filter (7I) and the first input circuit (5) to the two-wire terminal (2) (8) and a second input circuit (6) with a four-wire terminal (4) and a two-wire terminal (1) and a four-wire terminal (3), while the output of the input switch circuit (9) is coupled to the circuit (10) ) a function switch which is connected both to the level meter (13) and the noise meter (14) and to the generator circuit (12) and the encoder (11) with a memory connected to the level meter (13) and the meter (14) Sumu.