Used with Serial and asynchronous modules HWIC-8A,  to provide highly flexible connections for Cisco® 1800, 1900, 2800, 2900, 3800, and 3900 Series Integrated Services Routers (ISRs).  The 8-port asynchronous cable provides the high-density connector on one end and eight RJ-45 plugs on the other.  Modular adapters are then used for DTE and DCE connections.