10 / 100 Base-T Ethernet 2 Port Voip Gsm Gateway 4 FXS ATA SIP / H.323

Model:OFS-VPA4

The OFS-VPA4 is designed as a compact, high performance, and low cost VoIP Analog Terminal Adaptor (FXS Gateway). It comes with 4/8 FXS ports to interface with traditional analog phone sets or PBX trunk lines for VoIP calls.

The OFS-VPA4 is a full featured FXS gateway and is designed for easy installation and configuration. It supports the two most widely used Open VoIP Standards (SIP and H.323). This allows the OFS-VPA4 to interoperate seamlessly with soft switches or IP PBXs made by various vendors. Its high performance offers toll quality voice, flexible networking, and feature rich call functions. It is an ideal low cost solution for SME environment where multiple lines are required.

Advanced System Features

• Network interface setup wizard for DHCP, PPPoE, or fixed IP network environment
• Auto configuration support (Plug-n-Play) in encrypted or plain-text format
• Smart firmware management support (no need for manual firmware upgrade)
• Compatibility in multi-vendor open architecture VoIP networks
• Dynamic DNS (DDNS) support
• NTP and redundant DNS servers support
• QOS (TOS, Diff-Serve, 802.1p/q VLAN)
• NAT/Firmware traversal support with session border controller or STUN server
• Multi-language support

Key Features

• SIP/H.323 protocols supported
• 2 Ports Ethernet switch with router function
• FXS port interface with traditional phone or PBX trunk line
• Caller ID Signal Generation for VoIP Calls
• Call Hold
• Call Forward
• Call Transfer
• Dial Plan
• Hot Line
• Call Waiting Function
• Phone Book
• Predefined User Commands for special call operations
• Configuration via built-in web server or auto provisioning server
• Voice Prompts for LAN and PC Port Addresses

Standards Supported

• Open system SIP VoIP architecture for seamless integration into multi-vendor VoIP networks
• Standards include : H.323 V4.0, SIP 2.0, TCP/UDP/IP, RTP/ RTCP, HTTP, ARP/RARP, ICMP, DNS, DHCP, NTP, TFTP, MD5 authentication, TOS, Diff-Serve, VLAN
• CODECs: G.711(a-law/u-law), G.729A/B, G.723

In-band/Out-band (RFC-2833/SIP INFO) DTMF dialing