The Cisco 805 router can connect a remote office to a corporate office or a small professional office to an Internet service provider (ISP). The Cisco 805 supports both synchronous serial connections and asynchronous dial connections, synchronous connections include Frame Relay, leased line, X.25 up to speeds of up to 512 kbps. When using asynchronous dialup with an external modem, the Cisco 805 only connects to the Internet when required, and then immediately disconnects when the line is no longer being used, minimizing per-minute usage charges. Access control lists make sure that only important traffic initiates the Internet connection, further increasing the cost savings. The advanced routing protocols of the Cisco 805, including Snapshot and triggered RIP, ensure routing table information is exchanged efficiently; and STAC compression increases total throughput. Asynchronous serial speeds up to 115.2 kbps.