8 port asterisk voip adapter gateway

OFS-VPA4/VPA8 series ATA

The OFS-VPA4/VPA8 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 HT-842R/882 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 HT-842R/882 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

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

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

Model OFS-VPA4: 4-FXS Port

Model OFS-VPA8: 8-FXS Port

Package Content

• OFS-VPA4 or OFS-VPA8 ATA
• AC/DC power adapter
• Ethernet cable

Regulatory Approval: CE, FCC