Cisco WS-C2960S-24PD-L Software Guide - Page 43

Chapter 1 Overview Where to Go To Next Long-Distance, High-Bandwidth Transport Configuration Figure 1-7 shows a configuration for transporting 8 Gigabits of data over a single fiber-optic cable. The Catalyst switches have Coarse Wave Division Multiplexer (CWDM) fiber-optic GBIC modules installed. Depending on the CWDM GBIC module, data is sent at wavelengths from 1470 nm to 1610 nm. The higher the wavelength, the farther the transmission can travel. A common wavelength used for long-distance transmissions is 1550 nm. The CWDM GBIC modules connect to CWDM optical add/drop multiplexer (OADM) modules over distances of up to 393,701 feet (74.5 miles or 120 km). The CWDM OADM modules combine (or multiplex) the different CWDM wavelengths, allowing them to travel simultaneously on the same fiber-optic cable. The CWDM OADM modules on the receiving end separate (or demultiplex) the different wavelengths. Using CWDM technology with the switches translates to farther data transmission and an increased bandwidth capacity (up to 8 Gbps) on a single fiber-optic cable. For more information about the CWDM GBIC modules and CWDM OADM modules, refer to the Installation Note for the CWDM Passive Optical System. Figure 1-7 Long-Distance, High-Bandwidth Transport Configuration 74089 8 Gbps CWDM OADM modules Eight 1-Gbps connections Catalyst 2900 XL, Catalyst 2950, Catalyst 3500 XL, and Catalyst 3550 switches Access layer CWDM OADM modules Catalyst 4000 multilayer switches Aggregation layer Where to Go To Next Before configuring the switch, review these sections for start up information: • Chapter 2, "Getting Started with CMS" • Chapter 3, "Getting Started with the CLI" • Chapter 4, "General Switch Administration" 78-6511-08 Catalyst 2900 Series XL and Catalyst 3500 Series XL Software Configuration Guide 1-21