Cisco HWIC-4A/S, 4-Port Async/Sync Serial Ports HWIC HECI: CNUIAC9AAA PN: 73-9117-05 Cisco 4-Port Async/Sync Serial HWIC - 4 x Synchronous /Asynchronous Serial The HWIC-4A/S provides four serial async/sync ports using Smart Serial connectors and cabling. Each port can operate up to 256 Kbps in sync mode, or up to 230.4 Kbps in async.

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• Cisco High-Speed Interface Card Serial Adapter - 4 Ports (HWIC-4A/S)