How to search phone number in rural exchange

摘要

1. TECHNICAL FIELD OF THE INVENTION;The present invention relates to a telephone number search method for efficiently forming an extension path by locating a port of an extension subscriber with a called party number to be received.;2. The technical problem to be solved by the invention;The present invention provides a method for searching a telephone number for efficiently forming an extension path by locating a port of an extension subscriber with an incoming subscriber number to be received.;3. Summary of Solution to Invention;A telephone number search method in an R & D switch for easily finding an extension of an extension subscriber's port with an incoming subscriber's number to be received, comprising: a plurality of indexes in an outgoing subscriber's telephone number received from an originating subscriber or an MMC The first index is searched as the thousand number of the station number and the subscriber number, and the second index is searched for the hundredth unit tenth unit number of the subscriber number, and when the at least four digit number is received from the calling subscriber, the station number is And sequentially search the memory area to which the thousandth number of the calling subscriber is assigned, and find the index of the search result, and the index becomes the block number of the port numbering area, and multiplies the block number by one block size The offset of the port number designation area is obtained by adding the unit number.;4. Important uses of the invention;Suitable for farming and fishing village exchanges.