Cisco 1-Port Serial High-Speed WAN Interface Card - Expansion module - HWIC - RS-232, RS-530, X.21, V.35, RS-449, RS-530A - refurbished - for Cisco 1841, 1841 ADSL2, 1921 4-pair, 1921 ADSL2+, 1921 T1, 19XX, 28XX, 29XX, 38XX, 39XX
- WAN access and aggregation
- Legacy protocol transport
This Serial High-Speed WAN interface card (HWIC) provides highly flexible connections for Cisco integrated services routers. This HWIC helps customers enable applications such as WAN access, legacy protocol transport, console server, and dial access server. You can mix and match HWIC to tailor cost-effective solutions for common networking problems such as remote network management, external dial-modem access, low-density WAN aggregation, legacy protocol transport, and high-port-density support.
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WAN access and aggregation
Serial interfaces can be used to provide WAN access for remote sites.
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Legacy protocol transport
Serial ports are ideally suited to transport legacy traffic across a TCP/IP network, facilitating network convergence and eliminating costly separate leased lines for this traffic.
