GoIP VOIP 8 channel Gateway GSM Converter SIP IP Phone Adapter !

Brand new item, shipment from London, payment by Paypal I bought it from Hybertone China 2 days ago (4 in quantity) for UK customer who no more need it, hence want a quick sale for 475 each or 1800 for 4. Great for enterprise VOIP solution or call origination/termination. Provide 8 cellular channels for IP-PBX Support open standard SIP Protocols (IETF SIP V2) Support SIP proxy mode Multiple grouping mode Two 10/100 Ethernet ports for the LAN and an additional device Quad band GSM module: support GSM 850MHz, 900 MHz, 1800 MHz, 1900MHz Speech quality ensured by QOS at LAN, IP layers and comprehensive jitter buffer VLAN and QOS support NAT Transversal Voice prompts, HTTP Web Highly stable embedded Linux operating system in high performance ARM 9 Processor LEDs for Power, Ready, Status, WAN, PC, GSM Call forward from GSM to VoIP and VoIP to GSM Dial in mode or dial out mode only Dial Plan Password protection for dialing in or dialing out Retransmit GSM Caller ID to VoIP terminal Dynamic selection of codec Advanced jitter buffer Automatic traversal of NAT and firewall VLAN / QOs Echo cancellation for Speakerphone Comfort noise generation (CNG) Voice activity detection (VAD) Auto provisioning (requires auto provisioning server) Firmware upgrade from GUI RFC 1889 - RTP/RTCP RFC 2327 - SDP RFC 2833 - RTP Payload for DTMF Digits, Telephony Tones and Telephony Signals RFC 2976 - SIP INFO Method RFC 3261 - SIP RFC 3264 - Offer/Answer model with SDP RFC 3515 - SIP REFER Method RFC 3842 - A Message Summary and Message Waiting Indicator RFC 3489 (STUN) - Simple Traversal of User Datagram Protocol (UDP) Through Network Address Translators (NATs) RFC 3892 - SIP Referred-By Mechanism Proprietary Firewall-Pass-Through Technology Codec: G.711 (A/µ law), G.729A/B, G.723.1 DTMF: RFC 2833, In-band DTMF, SIP INFO Web-base Management PPP over Ethernet (PPPoE) PPP Authentication Protocol (PAP) Internet Control Message Protocol (ICMP) TFTP Client Hyper Text Transfer Protocol (HTTP) Dynamic Host Configuration Protocol (DHCP) Domain Name System (DNS) User account authentication using MD5 Processor: ARM9E 133MHz DSP: VPDSP101-4 100MHz Memory: RAM 16MB/ Flash 4MB GSM Module: Type: 850MHz, 900MHz, 1800MHz, 1900MHz Power: Input AC100V ~ 240V, output 12 Vdc 2000 mA Power consumption: 5W maximum Operating temperature: 10°C to 40°C (32°F to 104°F) Storage temperature: 0°C to 50°C (32°F to 122°F) Working Humidity: 40% ~ 90% Not congealed Weight: 1.2k g (3 lb) (Including AC/DC Adapter) Size:200mm (W) x 370mm (L) x 75mm (H) Power:12 V 3A .