Secondary dialing method based on wireless access system and wireless access equipment

Abstract

The invention is applicable to the field of communication and provides a secondary dialing method based on a wireless access system and wireless access equipment. The method comprises the steps that DTMF signals are produced through secondary dialing; early-stage control signals are generated according to the DTMF signals; high-frequency signals in the DTMF signals are filtered according to the early-stage control signals so that resolution of the DTMF signals can be blocked; an uplink audio frequency channel is controlled and closed according to the DTMF signals, and an AT instruction is generated; the AT instruction is subjected to signal processing and then transmitted to a network end. According to the secondary dialing method based on the wireless access system, a digital filter in the uplink audio frequency channel in a wireless communication unit is used for finishing blocking the DTMF signals of the uplink audio frequency channel so that a receiving terminal of an opposite side can not recognize the DTMF signals transmitted to the receiving terminal through the audio frequency channel, and the problems that the wireless access equipment is low in success rate, high in false alarm rate and prone to being disturbed by wireless radio frequency in the secondary dialing process are solved thoroughly; the method has the advantages of being economical, practical, simple and effective.

Description

technical field [0001] The invention belongs to the communication field, in particular to a wireless access system-based secondary dialing method and wireless access equipment. Background technique [0002] With the rapid development of wireless technology, more and more wireless access devices appear in offices and homes. In the existing wireless access systems, whether it is GSM (Global System for Mobile Communications), CDMA (Code Division Multiple Access), WCDMA (Wideband Code Division Multiple Access), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) and other wireless access technologies Input devices generally include: main control chip, wireless module, subscriber line interface circuit (Subscriber Line Interface Circuit, SLIC), dual tone multi-frequency (Dual Tone Multi Frequency, DTMF) generation and decoding circuit. This kind of wireless access equipment is widely used in many fields because of its convenient installation and maintenance, and l...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the embodiment of the present invention is to provide a two-stage dialing method based on a wireless access system, which aims to solve the problems of low secondary dialing success rate, high false alarm rate and susceptibility to radio frequency interference in the current wireless access system

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