<P>The Cisco ONS 15454 (SONET) is the first evolutionary optical transport platform. The ONS 15454 enables networks to carry unlimited data, voice, and video traffic. While access facilities are adding capacity and core facilities are rapidly expanding, transport networks have become the bandwidth bottleneck. The Cisco ONS 15454 delivers supercharged transport, integrated optical networking, unprecedented multiservice interfaces, and next-generation economics. </P> <P>The Cisco ONS 15454 brings all the functionality of multiple SONET multiplexers, optical networking, and switching network elements together in one easy-to-use platform. The beginning of the Cisco ONS 15454 broad portfolio is its ability to support flexible topologies - Point to Point, Linear Add/Drop, Rings, and Mesh. This evolutionary platform supports a broad variety of service interfaces, including TDM (DS1, DS3, DS3 Transmux, EC1/ STS1), data (10/100Mbps Ethernet), and optical (OC3/3c, OC12/ 12c, OC48/48c). All optical bandwidth and optical services are deployed on demand by exchanging interface cards. The Cisco ONS 15454 allows service providers to get new services up and running faster and more efficiently than ever before.</P>