Cisco 16PORT ASYNC HWIC SPARE Serial, Synchronous Module

Cisco 16-Port Asynchronous High-Speed WAN Interface Card (HWIC-16A) - Sixteen asynchronous EIA-232 ports

Supported Platforms include 2800, 29000, 3800 and 3900 series.

These modules help customers enable applications such as
WAN aggregation, transport for traditional protocols, console servers, and dial access servers. Customers can mix
and match modules to tailor cost-effective solutions for common networking problems such as remote network
management, external dial-modem access, low-density WAN aggregation, transport for traditional protocols, and
high-port-density support.