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Expansion module - 1 ports - fractional T-1 - refurbished
The Cisco platforms offer a wide variety of serial connectivity modules to accommodate the range of application needs in customer networks. The serial network module family for the Cisco 3600 series assures customers that they can choose a serial connectivity solution that fits their requirements. Available as network modules or WAN interface cards, serial connectivity options offer several port densities, synchronous and asynchronous alternatives, and integrated channel service unit/data service unit (CSU/DSU). As modular components, they are easily and inexpensively field upgradeable as customer requirements change. The Cisco Systems' T1 data service unit/channel service unit (DSU/CSU) WAN interface card is an integrated, fully managed DSU/CSU for T1 or fractional T1 service. Supported on the Cisco 1600, 1720, 2600, and 3600 series routers, it provides a cost-effective router-DSU/CSU combination.
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