DUAL MEDIA GATEWAY DEVICE IN ATM SWITCHING SYSTEM AND CONTROL METHOD THEREOF

摘要

PURPOSE: A dual media gateway device in an ATM switching system is provided to mount ATM physical layer boards and ATM layer functional boards in dual methods, and to separately manage the mounted boards, thereby implementing high reliability and high transmission efficiency when transmitting voice and data. CONSTITUTION: An APIA(ATM Physical Layer Interface Assembly)-A(13) and an APIA-B(14) perform physical layer functions by interfacing with an AIM(ATM Interface Module)(11). An MMCA(Media Gateway Module Control Assembly)-A(15) and an MMCA-B(16) perform ATM layer functions. SUs(Service Units)(17,18) perform narrowband network interworking functions. An alarm block(19) informs a maintenance process of monitored results on the APIA-A(13) and the APIA-B(14), and replaces a link of the AIM(11) with the APIA-A(13) or the APIA-B(14). Either of the MMCA-A(15) and the MMCA-B(16) is activated, and activates either of the APIA-A(13) and the APIA-B(14) to be interfaced with the AIM(11). The inactivated MMCA is activated if the activated MMCA is abnormal.