.7 SIGNALLING SYSTEM NO.7 CONNECTION APPARATUS FOR CONNECTING PUBLIC SWITCHED TELEPHONE NETWORK AND ASYNCHRONOUS TRANSFER MODE

摘要

PURPOSE: An SS7(Signaling System No.7) connection system for connecting a PSTN and an ATM(Asynchronous Transfer Mode) network is provided to efficiently use system resources by efficiently transferring only an SS7 channel among PSTN TDM(Time Division Multiplexing) channels to an SS7 signaling block. CONSTITUTION: An SS7 connection system for connecting a PSTN and an ATM network is composed of a TDM bus(302), an AAL1(ATM Application Layer 5) SAR(Segmentation And Reassembly sublayer)(304), an AAL5 SAR(306), an SS7 signaling block(308), a time switch(310), and an ATM control block(312). The SS7 connection system transfers only an SS7 channel among TDM links to the SS7 signaling block(308) using the time switch(310), and other user data to the AAL1 SAR(304) or an AAL2 block. In other words, the SS7 connection system extracts all inputted TDM data by time slots using the time switch(310), and transfers only the time slot selected as the SS7 channel to the SS7 signaling block(308).