APC SYHF6KT Asynchronous Network Module, 16 Ports | Cisco, DB-68

Maintain access to serial-based infrastructure without redesigning the network edge. The APC SYHF6KT asynchronous network module provides 16 asynchronous serial interfaces through two DB-68 connectors and octal breakout cabling, giving you a compact way to aggregate legacy devices in Cisco environments. With support for data networking applications and signaling up to 134 kbps, this module is suited for operations that still depend on console servers, industrial controllers, and other serial endpoints. It is designed to fit Cisco 2600, 2600XM, 2650, 3620, 3640, and 3660 series platforms with the IOS versions listed in the source data. For teams extending the life of proven infrastructure, this module offers a practical path to preserve connectivity while avoiding a larger platform refresh. The result is cleaner serial consolidation, fewer adapter layers, and a more controlled transition from older endpoints to current network operations.