Feature 1. Voice features - Voice gateway between POTS telephones and VOIP - Incoming and outgoing calls can be routed over either the PSTN or VOIP, with PSTN switching for up to two FXS ports - Support for SIP protocols - Voice processing functions including asymmetric selection of voice codecs (G. 711, G. 726, G. 729ab) - Echo cancellation (G. 168) -configurable 2. Wireless LAN 802. 11g - Fully integrated IEEE 802. 11g-compliant MAC, baseband, and modem functions - Supports 802. 11g data rates of up to 54 Mbps with automatic fallback to 48, 36, 24, 18, 12, 9, and 6 Mbps - Supports 802. 1lb data rates of up to 11 Mbps with automatic fallback to 5. 5, 2, and1 Mbps - OFDM modulation with full-duplex MAC and half-duplex baseband - Multiple radio interfaces - Supports 64 and 128-bit WEP, WPA, and 802. 1x 3. Adsl2 Subsystem The ADSL subsystem handles all the physical aspects of the ADSL, including line coding, error correction, and interfacing with the 2-or 4-wire local loop. The ADSL subsystem includes the following features: - Supports fast and interleave latency - Supports the following types of line coding: DMT: T1. 413, G. 992. 1, G. 992. 2, G. 992. 3, G. 992. 5 with auto-detection 4. Bridging / Routing Functionality - Up to 64 hosts - Transparent bridging as specified in IEEE 802. 1d - Network Address Translation (NAT) SNMP, ICMP, H. 323, L2TP, Quake, MRC, ICQ, and CUSeeMe - Dynamic IP address allocation is supported through: - Point-to-Point Protocol (PPP) - Routing Information Protocol (RIP) v1 and v2 5. Supported Client / Server Applications - FTP and TFTP client / server - DHCP client and server - Telnet server - HTTP server - RADIUS client 6. Network Management - DSL Forum TR37-compliant autoconfiguration using ILMI to set up access protocols (e. G. , PPPoE, PPPoA) and other settings - AutoDetect feature enabling automatic configuration of VCI / VPI values - SNMP agent and tools - CLI (Command Line Interface) via serial interface or Telnet over Ethernet or DSL - Web-based Graphical User Interface (GUI) enabling end-user device configuration via HTTP - Update of boot image or configuration data over TFTP / FTP 7. Security - Firewall - Network Address Translation (NAT) : - PAP / CHAP authentication on PPP connections - Embedded Firewall - User-configurable IP-and MAC-level packet filtering to accept / deny packets based on layer 3 or layer 2 rules. 8. VPN (under developing) - Virtual private network solution via an embedded encryption engine - Point to-point tunneling protocol (PPTP) - Layer 2 tunneling protocol (L2TP) .