The Catalyst 8540 MSR ATM OC-48c Super Port Adapter Modules are ideal for supporting high-speed ATM backbone applications. The OC-48c Super Port Adapter Modules are supported by the Catalyst 8540 MSR, a high-end multiservice switch that integrates L3 and ATM switching in one high-performance platform.The ATM OC-48c super port adapter modules are dual-slot, full width interface modules available for the Catalyst 8540 MSR. The OC-48c long-reach (LR) version allows customers to connect sites with link spans of a maximum of 80Km, while the OC-48c intermediate-reach (IR) version of the OC-48c interface allows customers to connect sites with link spans up to 15Km. The ATM OC-48c interface modules are designed specifically to meet the demanding needs of large enterprise and service provider networks that require high capacity multiservice links between sites.