Service switching method and system

Abstract

The method for switching services includes steps: step S102, in procedure of voice call, when receiving signal tone for switching services from equipment at called user, the mobile station at the called party carries out service negotiation and hard switching through the base station controller at the called party to establish connection to network intercommunication function unit (NIFU) at the called party; step S106, through receiving in-band message, the base station controller at calling party starts switching services, establishes connection between the calling party and NIFU at the calling party so as to complete switching services. The invention also discloses the system for switching services. The invention also discloses another method and system for switching services. Without changing habit user uses, the invention implements function for switching IWF services between voice service and facsimile service so as to be convenient for user to do operations.

Description

technical field [0001] The present invention relates to the communication field, and more particularly relates to a service switching method and system. Background technique [0002] The Interworking Function (IWF for short) is a device in the wireless network, which supports the circuit domain data service interworking function of the wireless network and other networks (such as PSTN, ISDN, Internet, and other PLMNs), and uses asynchronous data Perform services such as remote access, Email access, Intranet access, ISP access, public database retrieval, and interconnection of two data terminals. [0003] According to the location of IWF resources, the IWF can be divided into a CDMA Interworking Function (CIWF for short) and a Shared Interworking Function (SIWF for short). Among them, CIWF is based on the IWF function of the base station controller (Base Station Controller, referred to as BSC), and the IWF device is connected to the BSC; SIWF is based on the IWF function of ...

AI Technical Summary

Problems solved by technology

[0005] 1) In the same call, it is impossible to notify the other party in advance to prepare for receiving faxes, and the other party's fax machine does not necessarily support automatic faxing;

[0006] 2) If it is set to direct fax, the number and fax machine can only be used for fax business. If you want to make a phone call, you need to reset it. The operation is troublesome, and the function of voice call cannot be played.

[0007] 3) The previous method can no longer be used after port A becomes IP

[0015] After the voice is connected, when switching to the fax service, the called party can complete the voice-to-fax switching; the calling user must manually press the flash prefix + flash key + send to manually switch (if the fax machine does not have a flash key, you can only press the Fork switching), the customer operability of this scheme is poor

[0016] 2) The timing of manual switching is very difficult to grasp:

However, DIS and DCS messages are different due to different fixed stations and fax machines, so it is definitely impossible to put them into commercial use

Images