SU720790A1 - Device for remote testing of taxophones - Google Patents

Description

(54) DEVICE FOR REMOTE CONTROL OF TAX PHONES

one

The invention relates to a telephone communication technique and can be used for remote control of payphones.

A device for remote monitoring of payphones is known, which contains a subscriber response relay, through a normally open contact of which the ground is connected to the bus to the input of the payphone 1 borrowing unit.

However, the known device does not allow controlling short-term occupations of a payphone, which characterize its malfunction, which significantly reduces the quality of control.

The purpose of the invention is to increase the quality of control by detecting short-term occupations of a payphone.

For this, a remote control device, payphones containing a subscriber response relay, through a normally open contact of which the earth is connected to the bus to the input of the payphone occupancy unit, is entered a block for measuring the duration of the occupation, a counter for the number of short-term borrowings and an OR element, and the output of the block payphone connection is connected to one of the inputs

of the OR element, and the input of the payphone block is connected via a series-connected block for measuring the duration of the occupation and a counter for the number of short-term occupations to another input of the OR element.

The drawing shows a structural electrical circuit of the device for remote control of a payphone.

The block diagram of the stationary telephone switchboard device contains a subscriber answer relay G, through a normally open contact 2 of which the ground is connected to the bus to the input of the payphone 3 occupancy unit, the occupancy duration measurement unit 4, the counter 5, the number of short-term occupations, element 6 OR. The device works as follows. At the initial moment of time, the device for remote monitoring of payphones is in the initial state. With each answer of the called subscriber, relay 1 responds the subscriber and closes its normally open contact 2. If during the monitoring period there is not a single answer of the called subscriber, the payphone 3 busy unit will generate an alarm on which element 6 OR. When the payphone does not respond to the called subscriber, an alarm is not generated. If, in the process of monitoring, the duration of a payphone after the answer of the subscriber is below the preset one, then the 4th time unit is occupied by a signal and the contents of the counter S Numbers of short-term occupations are increased by one. If during the period of control is short-term; the payphone's gwie answer of the called subscriber will exceed the threshold value, the three-time counter of the number of short-time occupancy will generate an alarm on the other element 6 OR.

Payphones were identified in a telephone manner when calling from which, during the monitoring period, the called subscriber’s response was never recorded or the edge of the call was answered many times after the called subscriber answered, indicating a faulty payphone.

207904

Claims (1)

Invention Formula The device for remote monitoring of payphones, containing a subscriber response relay, through 5 normally open kOHiaKT of which the ground is connected to the input of the payphone block, characterized by the fact that, in order to improve the quality of the con: trol by adding short-term occupations of 10 payphones, the introduction of a block for measuring the duration of a occupation, a counter of the number of short-term employment and an OR element, while the payphone output is connected to one of the inputs of the OR element, and the payphone input of the payphone is connected via flax connected measuring unit coupled duration ti and the counter number of short Tille coupled to the other inputs of the OR element. Sources of information taken into consideration during the examination 1. Instructions of the table controller,. for the work of payphones-automats (SKTA), approved by ULGTS from 08/17/72 (prototype)