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Updated:January 21, 2003
® 8850 AXSM Broadband ATM Switching Module in combination with the high-capacity PXM-45 processor (along with XM-60 switching module when used in MGX 8950 chassis) delivers connectivity from T3/E3 to OC-48c/STM-16. The Cisco MGX 8850 Multiservice Switch can accommodate a total of 12 AXSM modules to provide the high broadband densities required by service providers.
The AXSM 16 COS queues architecture combined with PXM-45 and RPM, offers the industry's most advanced and reliable ATM networking features such as Private Network to Network Interface (PNNI), switched virtual circuit/path (SVC/SVP), soft permanent virtual circuit/path (SPVC/SPVP), and MPLS.
The AXSM module meets service providers' demands for carrier-class availability by offering hot standby 1:1 card redundancy with Y-cable as well as redundancy with SONET/SDH automatic protection switching (APS). The AXSM module with its large connection count achieves tremendous scalability for aggregation applications. The AXSM module in the MGX 8850 switch delivers unprecedented levels of scalability, performance, and functionality required for service provider ATM networks to scale up to OC-48c/STM-16 today.
• AXSM can be used in the MGX 8850 to provide ATM capability up to OC-48c/STM-16.
• High scalability in interface speeds with T3/E3 ports, OC-3c/STM-1, OC-12c/STM-4, and OC-48c/ STM-16 AXSM modules. Each port on the AXSM can be configured for either trunk or access applications.
• Industry leading module port densities of 16 T3/E3 ports, 16 OC-3c/STM-1 ports, 4 OC-12c/STM-4 ports, and 1 OC-48c/ STM-16 port that can scale up to 12 OC-48c/STM-16 modules in each MGX 8850 Multiservice Switch. Each OC-48c/STM-16 delivers fully nonblocking, full duplex throughput, in which a connection can occupy the entire line rate.
• Support for all ATM service classes, with up to 16 classes of service (CoS). Supports carrier-class implementation of standards-based PNNI, SVC/SVP, SPVC/SPVP, and MPLS services.
• Large cell buffers (one million cells), which help to maximize "goodput" performance during congestion, reducing the number of retransmits; the buffers are allocated dynamically, depending on connection resource needs, thereby optimizing use of system resources.
• High reliability with hot-standby 1:1 AXSM card redundancy, 1:1 and 1+1 line redundancy using APS.