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The Internet is rapidly becoming an electronic agent for commerce, entertainment, communication, and information retrieval. At the same time, new network-enabled intranet applications and powerful desktop computers are driving anexponential increase in network traffic. Its increasing popularity has forced several carriers, competitive local exchange carriers (CLECs), and service providers (SPs) to offer high-speed dedicated access. Currently the twomost popular dedicated access connections are DS0 (transmission speed of 56 kbps) and T1 (transmission speed of 1.544 Mbps).
Many businesses that use these types of connections togain access to the Internet are experiencing strains in throughput and slow response times. Network designers aresearching for a new networking solution that can satisfy the ever-increasing need for bandwidth and transmission capacity. As a result of this emerging demand, carriers, CLECs,and ISPs are now offering DS3 (45 Mbps) dedicated accessconnections.
Anticipating these trends, Cisco Systems has responded bydeveloping a channelized OC-12 (CHOC-12/DS3) line card; it is designed to simplify the deployment of DS3 services. TheCHOC-12/DS3 line card provides up to 12 DS3 channels over a single optical interface.
As part of Cisco's "optical Internet" vision, the CHOC-12/DS3 provides the following benefits:
•Cost reduction—Expensive cables, DS3 equipment, and insome cases Frame Relay switching equipment can be removed from core networking sites.
•Simplified DS3 deployment—A simple optical fiber replaces a complex maze of cables and equipment.
•Easier management—With the reduction in equipment, DS3deployment will be easier and more efficient.
•Improved network availability and reliability—The card reduces the possibility of failure because it supports Synchronous Optical Network (SONET) automatic protection switching (APS) and reduces the amount of equipmentrequired.
•Investment protection—The CHOC-12/DS3 is compatible with theproducts of many of the leading DS3 data service unit/channel service unit (DSU/CSU) andFrame Relay equipment vendors.