8 Ports/8 Channels/8 SIM Cards Asterisk VoIP GSM SIP Gateway GoIP-8 Call Termination With Imei Change+Quad Band (SIM Box GSM VoIP Gateway)

Product name: 8 Ports GSM VoIP gateway/8 Channels GSM VoIP gateway/8 Port GoIP gateway/8 Channel GoIP gateway(supporting 8 SIM cards)
Key features
Provide eight cellular channels for IP-PBX
Support open standard SIP Protocols (IETF SIP V2)
Support SIP proxy mode
Multiple GoIP8 grouping mode
Two 10/100 Ethernet ports for the LAN and an additional device
Guad 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
Enhanced Features
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 both GSM dial in or dial out
Retransmit GSM Caller ID to VoIP terminal
Dynamic selection of codecs
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
Supported Standards
ITU: H. 323 V4, H. 225, H. 235, H. 245, H. 450
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
Hardware Specifications
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: 1550 g (3 lb) (Including AC/DC Adapter)
Warranty: 1 year