4 GSM VOIP Gateway GOIP-4 for Asterisk,Trixbox,3CX,SIP Proxy Server,Voip Buster

GoIP VOIP Gateway GSM Converter SIP IP Phone Adapter

Quad Band 4xGSM SIM Gateway:Trunk to Asterisk iP PBX

Protocols

TCP/IP V4 (IP V6 automatic adaptive)
Dual VoIP protocols: ITU-T H.323 V4, IETF SIP V2.0
Multiple Codecs: ITU-T G.711 Alaw/ULaw, G.729A, G.729AB, G.723.1 and GSM
H.2250 V4
H.245 V7
H.235 (MD5, HMAC-SHA1)
RFC1889 real-time digital transmission protocol
NAT
STUN
Network Management Protocol (NMP)
PPPoE Dial Up
PPP Authentication Protocol (PAP)
Internet Control Message Protocol (ICMP)
TFTP
Hypertext Transfer Protocol (HTTP)
Dynamic Host Configuration Protocol (DHCP)
Domain Name System (DNS)
User Account Authentication (via MD5)
Proprietary Relay Protocol (Avoiding VoIP Blockings)

Hardware Features

ARM processor
DSP for voice signal processing
Two 10/100MB Ethernet ports (IEEE 802.3 standard) with status LEDs
Quadband GSM module (850M 900M, 1800M and 1900M)
External Antenna (Internal Antenna option for selected models)


Software Features

LINUX OS
Built-in Web Server for device configuration
Built-in SIP Proxy (Simplified)
PPPoE Dial Up
Router function
DHCP client & Server
QoS (VLAN)
VPN (PPTP)
Online firmware upgrade
Remote Control Mechanism for remote technical support
Proprietary Auto Provisioning Mechanism
Remote SIM function
Short Messages (SMS) support (standalone and server based)