The ONS 15454 SDH shelf assembly contains 17 card slots in the lower shelf, 12 Front Mount Electrical Connection (FMEC) slots in the upper shelf, a fan-tray assembly, a front panel with a liquid crystal display (LCD), and alarm indicators. All card and electrical connections are accessible from the front of the chassis. The ONS 15454 SDH carries traditional time-division multiplexing (TDM) and high-speed data traffic. A variety of card configurations offer incremental bandwidth increases as needed and support E-1, E-3, DS3i-N-12, STM-1, STM-4, STM-16, STM-64, 10/100 Ethernet, and Gigabit Ethernet speeds.
PCs and workstations can connect to the ONS 15454 SDH using direct, network (LAN and WAN), or data communications channel (DCC) connections. Cisco Transport Controller (CTC), the ONS 15454 SDH software interface, provides easy card-, node-, and network-level provisioning and troubleshooting. The ONS 15454 SDH deploys a variety of network configurations, including linear add/drop multiplexers (ADMs), subnetwork connection protection rings (SNCPs), two-fiber and four-fiber multiplex section-shared protection rings (MS-SPRings), subtending rings, and extended SNCP mesh networks.