The Cisco 831 router has an Ethernet WAN port for use with an external DSL or cable modem. This model offers a four-port 10/100 Ethernet LAN switch for connecting multiple PCs or network devices in a small-office network. The Cisco 830 Series delivers integrated enterprise-class security services, including hardware-accelerated IP security (IPSec), Triple Data Encryption Standard (3DES) encryption for virtual private networks (VPNs), and stateful inspection firewall for secure Internet connectivity. Optional advanced features - such as Cisco Easy VPN Remote (a software feature that allows simple deployment and management of VPNs), public key infrastructure (PKI) security requiring digital certificates, IPSec Network Address Translation transparency (NAT-T), the Cisco Intrusion Detection System (IDS), and URL filtering - help ensure that the small office receives the highest level of security, which in turn ensures the corporate network's security. The advanced QoS features of the Cisco 830 Series routers, combined with high-performance encryption, provide high-quality voice and video services to remote users. When IP phones are connected at a remote site, a Cisco 830 Series router can queue and prioritize the voice traffic over data traffic to ensure a high-quality, secure voice over IP (VoIP) connection from the remote or home-office back to the corporate network. The Cisco 830 Series utilizes valuable management and deployment tools to deliver the industry's lowest total cost of ownership for connecting small remote offices and teleworkers to the corporate network. As a remotely manageable platform, the Cisco 830 Series supports advanced remote troubleshooting commands available in Cisco IOS Software, a virtual auxiliary (AUX) port for out-of-band management with an external modem, and Secure Shell Protocol (SSH) for secure in-band management via telnet. minimize