The Catalyst 8540 OC-12c/STM-4 Packet-over-SONET Uplink with Enhanced Gigabit Ethernet Module is ideal for supporting high-speed Packet-over-SONET backbone applications that require non-blocking, wire-speed performance. This interface module has one Packet-over-SONET uplink port and one Enhanced Gigabit Ethernet port. The Packet-over-SONET Uplink with Enhanced Gigabit Ethernet Module is supported by the Catalyst 8540 platform, a high-end multiservice switch that allows customers to have integrated L3 and ATM switching in one high-performance platform.This module features an SMF Intermediate Reach.