RU34831U1 - Payphone Subscriber Station - Google Patents

Description

SUBSCRIBER POINT OF TAXOPHONE

The useful model relates to the field of telephony and can be used to provide local, long-distance and international communication services to subscribers, namely, to provide voice communication from public pay phones (pay phones) on a prepaid basis.

 Known subscriber station payphone. For the provision of services

prepaid voice calls to subscribers (payphone subscriber station, E.N. Dubrovsky, “GTS Subscriber Devices: Handbook., 4th ed., revised and supplemented, Moscow: Radio and Communications, 1986, p. 211), which is a prototype of the proposed utility model and consisting of a payphone with analog input and output, connected to a communication channel located in a specially equipped cabin. An analog communication channel (ACS) is a subscriber line of a public switched telephone network (PSTN). When the payphone is connected directly to the PSTN subscriber line (Fig. 1a), a switched end-to-end channel is allocated for talking between the dial-in and called-in subscribers, which is at their full disposal regardless of its load (voice or pause is transmitted). This approach is quite expensive, especially in the case of international negotiations.

At the same time, c) there are digital communication channels (CCS), in which it is not necessary to allocate a switched channel for the entire time of data transfer (Intranet, Internet). This is achieved by the fact that for transmission over the central digital data center, the data is divided into packets that are transmitted independently of each other, and at the destination they are again combined. When broken down into packets, data compression is performed, which additionally increases the throughput of the CSC. Thus, the transmission of the same amount of data on the CSC is less costly than on the ACS, and the channel requirements are less stringent. For transmission

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sound signal (speech) on the CCS, it must be digitized, compressed and broken into packets. For admission, it is necessary to carry out the reverse actions.

The objective of the proposed utility model is the adaptation of the subscriber's point of a payphone, consisting of a specially equipped booth and a payphone located inside it with an analogue output and output connected to a communication channel, to transmit voice messages over the CCS.

This problem is solved by the fact that in a subscriber station of a payphone consisting of a spedially equipped cable and a payphone inside it with an analog output and an output connected to a communication channel, a digital channel is used as a communication channel to which the subscriber station of the payphone is connected via an additional input adapter block (BA). The BA performs the functions of matching the analog input and output of a payphone and CCS.

The technical result of this utility model is that the transmission of a digitized, compressed, and packetized audio signal via the DSC significantly increases the channel capacity of the communication channel and reduces its quality requirements, because It does not require constant maintenance of the end-to-end channel between the calling and called subscribers, and compression reduces the amount of transmitted information (while pauses in the conversation practically do not load the line).

Further, the digitized signal is transmitted via the DSC (Intranet, Internet) to the adapter unit closest to the called subscriber, which combines the packets and converts the digital signal to analog. The latter is fed directly to the input of the called subscriber's TA (Fig. 16), or transmitted to the PSTN in close proximity to the called subscriber and then via the ACS with constant channel switching to the called subscriber (Fig. 1c). Due to the fact that a significant part of the distance between the calling and called subscribers falls on the digital channel.

reduced costs for communication between them. The scheme of transmitting a digitized and compressed signal from the subscriber's point of a payphone to the connection with the called subscriber via the central telephone exchange and PSTN presented in the description of this utility model serves only to explain the possibility of using communication between them via a digital channel (IP-telephony) and does not apply to the essence of the claimed utility model .

Thus, the operating costs for voice transmission during a telephone conversation are reduced, which is most pronounced when talking over long distances (long distance, international calls).

The proposed technical solution is illustrated in more detail by the following block diagram (Fig. 2). The subscriber station of the payphone (4) consists of a specially equipped booth (3) and the payphone (1) and BA (2) located inside it, see Fig. 2a. In this case, the analog input and output of the payphone (1) are connected to the BA (2), and the BA (2) is connected directly to the lines of the CSC (5). In this embodiment of the device, the subscriber station of the payphone (4) does not physically go beyond the cab (3).

BA (2) can be placed outside the cabin (3), Fig. 26. In this case, the above-described scheme for connecting the payphone (1) to the BA (2) and BA (2) to the CCS (5) is preserved. Placing the BA (2) outside the cab (3) may be advisable for the following reasons: a) The adapter has several analog inputs / outputs (ports), which allows you to connect several payphone subscriber points to one physical device adapter. At the same time, one physical adapter device will perform the function of several BA simultaneously for different subscriber stations. So, if one such adapter is located inside the cabin of one subscriber station, then for a second subscriber station connected to the same adapter, the BA is located outside the cabin, b) the access point to the central dialing station may not

match the location of the subscriber station. Then the BA is located at the access point, and the subscriber station itself is in an accessible place for subscribers.

The design of the cabin of a subscriber station can be different (open, closed, etc.) and allow its different placement (ground, wall, etc.). Lines CKS (5) are not part of the claimed utility model and are shown only to explain its design.

The device operates as follows. When a subscriber is called from a payphone (1) of a subscriber station (4), an analog signal is sent to the BA (2) of this station, which digitizes it, compresses it, splits it into packets, and transmits packets to the CCS (5). When establishing a connection with the called subscriber, a digital signal (digitized compressed speech) from the called subscriber is received from the digital communication center (5) from the call center (5), which is unpacked, converted into an analog signal and transmitted to the analog input of the payphone (1). The cab (3) provides sound insulation (when placed in public places) and the payphone (1) is protected from atmospheric influences (when placed outdoors). The operation of the device does not change when placing the BA (2) inside or outside the cockpit (3) of the call center (4).

Specific examples of the device (4).

1. According to fig. 2a. In a metal cabin (3) of the SVARZ plant, equipped in accordance with the established requirements (E.P. Dubrovsky, “GTS Subscriber Devices: Handbook., 4th ed., Revised and supplemented., Moscow: Radio and Communications, 1986, p. 211), there is one analog telephone adapter (2) ATA-186 from Cisco and one payphone (1) ТМС - 1517 К4 manufactured by OJSC “UPP Vektor (Ekaterinburg). The analog input and output of the payphone (1) are connected to the analog part of the adapter (2). The digital part of the adapter (2) is connected to the line (5) of the CCS (Intranet), through which the digitized sound signal arrives at the server of the IP-telephony operator (and vice versa). The latter routes the call to the Internet in accordance with the dialed number and

configuration of your IP telephone network. (The Intranet, the Internet, and the iterator’s server do not belong to the proposed utility model and are only mentioned to explain the operation of the claimed device).

2. According to fig. 26. The ATA-186 analog telephone adapter (2) is installed outside the booth (3) of the subscriber station (4). At the same time, the payphone (1) ТМС - 1517 К4 is still located inside the cab (3), the connection scheme of the payphone (1) and adapter (2) remains the same: the analog input and output of the payphone (1) are connected to the analog part of the adapter (2), the digital part of which is connected to the CCS (5).

The proposed design of a payphone subscriber station allows you to provide prepaid communication services using digital communication channels (Intranet, Internet) that were previously unavailable. This leads to a reduction in operating costs for a telephone call (with increasing distance, the cost reduction increases).

Claims (3)

1. The subscriber station of a payphone, consisting of a cab and a payphone located inside it with analogue input and output connected to a communication channel, characterized in that a digital channel is used as a communication channel, to which the payphone is connected through an additional adapter unit. 2. The subscriber station of the payphone according to claim 1, characterized in that the adapter unit is located inside the cab. 3. The subscriber station of the payphone according to claim 1, characterized in that the adapter unit is located outside the cab.