Dialing method and gateway equipment

Abstract

The invention discloses a dialing method comprising the following steps of: matching an FXO (Foreign Exchange Office) interface according to a received number when gateway equipment receives the number dialed by a user through an FXS (Foreign Exchange Station) interface; when the matching is successful, carrying out offhook on the matched FXO interface, sending a dialing request to a public switched telephone network (PSTN) by the matched FXO interface, and carrying out overlapped dialing on the received number through the matched FXO interface in a dual tone multiple frequency (DTMF) way when a dial tone is received; and when receiving the number dialed by the user is determined to be ended, carrying out time slot connection between the FXS interface and the FXO interface, and sending a ringback tone to the user to enable the user to wait for conversation. Based on the same inventive concept, the invention also provides the gateway equipment capable of realizing FXO calling under the conditions that the dialing habit of the user is not influenced and the calling time is not prolonged.

Description

technical field [0001] The present application relates to the technical field of voice call processing, in particular to a dialing method and a gateway device. Background technique [0002] see figure 1 , figure 1 It is a schematic structural diagram of a typical IP-based voice communication (Voice Over Internet Protocol, VOIP) telephone system. figure 1 Among them, the VOIP telephone system consists of a VOIP telephone network, a Public Switch Telephony Network (PSTN) telephone network, and a gateway device (Gateway). There are three types of interfaces on the gateway device, one type is the interface of Foreign eXchange Station (FXS), which can be connected to ordinary telephones; the other type of interface is the interface of Foreign eXchange Office (FXO), which can directly Connect with PSTN telephone line; another type of interface is IP interface, used for VOIP calls. In this telephone system, VOIP internal telephone calls, such as telephone 1 calling telephone 2,...

AI Technical Summary

Problems solved by technology

[0004] In mode 1, there is a certain delay, that is, the gateway device first receives the number dialed by the user (receiving the number) and then performs the second dialing. There are two main delays, one is when the gateway device waits for the completion of receiving the number Delay, the gateway generally cannot accurately configure the number of the entire network to accurately match the route, and will set a waiting dial timeout timer such as 5 seconds, so that the gateway device will wait for 5 seconds before making the second dial

Another delay is that the second dialing process after FXO off-hook usually takes 2-5 seconds

[0005] In mode 2, although the delay is relatively small, the dialing habit of the user is changed because the prefix must be dialed, and the user dials again after hearing the dial tone. Mandarin phones that do not support delay cannot succeed, because it will take 1-2 seconds from dialing the prefix to hearing the dial tone, and all other numbers in the middle will be lost

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