Connection number translating device and its method for translating connection number obtained from input ATM cell to system-inside number

摘要

A connection number converting device comprises a Contents Addressable Memory storing combinations of information including VPI and VCI numbers and connection type as well as system-inside numbers associated with the respective combinations of information, a CAM access unit for retrieving a translation table based on the type information and the VPI and VCI numbers acquired from an input ATM cell, and a system-inside number judging unit for estimating the retrieval result by the CAM access unit so to supply a desired system-inside number, the CAM access unit performing retrieval two times in a first retrieving method of retrieving the translation table based on the VPI number and the type information indicating a VP connection and in a second retrieving method of retrieving the translation table based on the VPI and VCI numbers and the type information indicating a VC connection.