SI 2640 Gateway

32 Ports plugable FXS, FXO or E&M modular Gateway
SI 2640 VoIP Gateway provides high-performance voice over IP(VoIP) solution including IP-routing services for small enterprise, government and other public offices as well as Internet game room and Internet based cyber apartment.

In addition, SI 2640 VoIP Gateway can be used in various network environments such as leased line, ADSL, and Cable Modem networking with fixed IP and dynamic IP environments. The 2640 supports various network protocols such as IP-routing, bridging, PPP, NAT/PAT, and network management features such as SNMP MIB v2, CLI, Web, etc. This VoIP gateway typically was designed using high-performance 32bit RISC microprocessor architecture with fixed network interface configuration: 2-Ports 10/100Mbps Fast Ethernet, asynchronous serial port for console.

IP Routing Protocol Service	Static and IEEE 802.1Q VLAN Routing
WAN Protocols	Point-to-Point Protocol (PPPoE for ADSL)
Voice over IP Service	ITU-T H.323 v3 VoIP Protocol with ITU-T H.235 Security Feature
	SIP protocol support compliant with IETF RFC3261 (or RFC2543)
	Supports Double stack of H.323 & SIP
	ITU-T H.323 Gateway, Gatekeeper Support
	G.723.1, G.729.A, G.711 Vocie Compression
	Voice Processing Feature Supports      - VAD(Voice Activity Detection)      - T.38 G3 FAX Relay      - DTMF(Dual Tone Multi Frequency)      - CNG (Comfort Noise Generation)      - G.168 Echo Cancellation
	Enhanced QoS Management Features for Voice Traffics
Security Functions	Standard & Extended IP Access List
	Enable/Disable for Specific Protocols
	Multi-Level User Account Management
	Auto-disconnect for Telnet/Console Sessions
	PPP User Authentication Supports ¡æ Password Authentication Protocol(PAP) ¡æ Challenge Handshake Authentication Protocol(CHAP)
Network Managements	Standard SNMP Agent (MIB v2) Support
	Remote Management using Console, Rlogin, Telnet
	Web based Managements using HTTP Server Interface
Operation & Managements	System Performance Analysis for Process, CPU, Connection I/F
	Configuration Backup & Restore for APOS Managements
	Debugging, System Auditing, and Diagnostics Support
	System Booting and Auto-rebooting with Watchdog Feature
	System Managements with Data Logging
	IP Traffic Statistics with Accounting
other Scalability Features	DHCP Server & Relay Functions
	Network Address Translation (NAT) Function
	Port Address Translation (PAT) Function
	Remote Upgrade for APOS Management using FTP/TFTP
	Command Line Interface(CLI)
	Network Time Protocol (NTP) Support