Fixed subscriber unit for radio local loop system and its call start control method

Abstract

A new call origination is requested because the user's telephone set 108 is off-hook. When detecting the off-hook state of the subscriber's telephone set 108, the FSU 200 immediately outputs a local dial tone signal and requests the establishment of a traffic channel for the wireless interface using radio communications to connect the BS 104, BSC 103 and LE 101. FSU 200 receives and queues the dialing digits entered by subscriber telephone 108 into FSU 200. After the traffic channel is established, the dialed digits stored in the queue are output to the LE 101. Immediately after the queue of stored digits is emptied, the audio path between the subscriber's telephone 108 and the LE 101 is opened.

Description

technical field [0001] The present invention relates to a fixed subscriber unit of a wireless local loop system. In particular, the present invention relates to a method of sending a local dial tone signal from a fixed subscriber unit to a subscriber telephone, receiving a DTMF (Dual Tone Multi-Frequency) signal from a connected subscriber telephone and a method of storing the DTMF signal thus received , and transmit information about DTMF signals from the fixed subscriber unit to the telephone network and enable the earliest possible connection of the audio path between the telephone network and the subscriber telephone after the wireless communication path is established between the fixed subscriber unit and the wireless base station Methods. Background technique [0002] A communication system called a wireless local loop system (hereinafter referred to as a "WLL system") using a fixed subscriber unit (hereinafter referred to as "FSU") has been devised and has gained com...

AI Technical Summary

Problems solved by technology

[0034] If the interval is set too short, the user may encounter a problem in which an inadvertent pause by the user before dialing subsequent digits causes premature output operations

[0035] As described above, in the case where the FSU 107 outputs a local dial tone signal in order to eliminate the dial tone delay, a new problem may arise: a connection delay occurs in determining the timing of establishing a transmission path (such as an audio path) between the user and the telephone network

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