Method for extending communication function and connection of telephone switchboard

Abstract

The invention provides a method for extending the communication function and the connection of a telephone switchboard. The original telephone switchboard can be communicated through another network except a public switched telephone network. The edge devices connected with the telephone switchboard can inquire the associated edge devices at any time, and frequently and automatically update the own edge device data list so as to achieve the effect of quickly establishing connection. In addition, the method for extending the communication function and the connection of the telephone switchboard can add an applicable function for the original telephone switchboard. For example, the edge device has encryption and decryption functions, so that when the telephone switchboards communicate through the edge device, the telephone switchboards can communicate in an encryption mode, and other advanced functions, such as multimedia communication, provided by the edge device also enable communication between the telephone switchboards to have the advanced functions.

Description

technical field [0001] The present invention relates to a method for extending the communication function and connection of a telephone exchange, in particular to a method which can facilitate the establishment of a telephone exchange network and is easy to update and maintain the telephone exchange network. Background technique [0002] In a common telephone network, the telephone exchange and the telephone exchange are generally connected to each other via a Public Switched Telephone Network (PSTN, Public Switched Telephone Network) for communication. However, telephone exchanges that communicate via the public switched telephone network are often subject to relatively high telecommunication charges. [0003] In addition, the number of telephone exchanges that have been deployed is huge, and the old styles also make the applicable functions less. Therefore, under the consideration of limited budgets, ordinary enterprises cannot greatly replace the number of telephone excha...

AI Technical Summary

Problems solved by technology

However, telephone exchanges that communicate via the public switched telephone network often need to bear higher telecommunication costs

[0003] In addition, the number of telephone exchanges that have been deployed is huge, and the old style also makes the applicable functions less. Therefore, under the consideration of limited budget, general enterprises cannot greatly replace the number of telephone exchanges, so they cannot keep pace with the times The use of newer features, such as newer encryption, the ability to decrypt communications, etc.

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