A bus-mode paging telephone

Abstract

The invention discloses a bus-mode command telephone, essentially comprising a transmission bus and a command telephone terminal. The transmission bus adopts field bus composed of 2-4 physical connection lines; the command telephone terminal consists of an audio input and processing module, a main control processing module, an audio power amplifier output module, a video input / output and control module, a video display module and a man-machine interface circuit. The audio input and processing module consists of an audio signal collecting circuit and a digital processing circuit that comprises a speech codec, a speech anti-noise processing circuit and a compressor circuit. The invention adopts a pair of buses as a transmission medium and the transmission has no host and is all digital, and therefore the invention overcomes disadvantages in the prior art, attaches customers at real time easily, expands network capacity, has the functions of auto exchange of customer information and audio collecting and uploading, can extend transmission and be connected with equipment arranged outside the network conveniently through heterogeneous network and effectively improves the stability and reliability of the command telephone system.

Description

technical field [0001] The invention relates to an industrial communication device, in particular to an all-digital bus system command telephone used for multiple groups of different users in the industrial field to communicate separately at the same time. Background technique [0002] The command telephone is widely used in the communication between the upper and lower processes of the production line on the industrial site. It is the main communication means of the industrial site. The command telephone mainly includes the control mode command telephone, the automatic command telephone, the digital command telephone and the bus system command telephone, etc. several types. [0003] The control mode command telephone and the automatic command telephone are composed of a dedicated host and a dedicated terminal. The deployment and control mode command telephone mainly adopts the cross-star connection mode of multi-line interconnection. In a user set, in order to be able to d...

AI Technical Summary

Problems solved by technology

The wiring of the bus system command telephone is simple, and the conversation between users is completed by selecting different lines and using space division, without the ability of automatic switching; the operation is inconvenient, and the caller and the called party need to adjust to the idle channel at the same time to be able to talk separately; the communication cable Using special multi-core cables, there is basically no room for expansion on site, and the application field is limited; the amount of real-time information is small, and there is no video configuration; the number of channels is fixed, and call overlap and channel occupation are serious when the capacity is large; expansion connection with external systems Difficult, unable to map internal users, basically do not have cross-network extension capabilities and inter-network group integration capabilities, and functions related to information exchange between users, system data display, and resource display must be realized based on upper-level equipment

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