- Cisco part number AS2511-RJ-CH - Supports 16 asynchronous ports (RJ-11), 1 Ethernet port (AUI), and 1 synchronous serial port (DB-60).- The Access Server 2511 is designed for small office and remote site environments.- This model is a fixed-configuration router that supports at least two interface types.- AS2511-RJ-CH comes standard with Flash EPROM technology for simplified software maintenance.