Description
The Cisco HWIC-4AS is a high-performance 4-port asynchronous/synchronous serial high-speed WAN interface card designed for modular Cisco routers. Built for flexibility, this compact module supports a wide range of WAN protocols and is ideal for applications requiring reliable serial connectivity, such as legacy protocol integration or low-speed WAN aggregation. Its design features four high-density 68-pin connectors, allowing for multiple serial connections through optional Cisco Smart Serial cables. The card is hot-swappable and integrates seamlessly into compatible Cisco ISR platforms like the 1800, 2800, and 3800 series.
Technically, the HWIC-4AS supports asynchronous speeds up to 115.2 kbps per port and synchronous speeds up to 1.344 Mbps, depending on the configuration. It offers full support for protocols such as HDLC, PPP, and Frame Relay, and is managed through Cisco IOS software for robust configuration and monitoring options. With minimal power consumption and a compact form factor, it’s an efficient choice for expanding serial connectivity in enterprise or industrial environments. The card’s durable construction and proven Cisco reliability make it a solid option for those seeking used networking hardware with long-term value.