16 Channels GSM Voip Gateway is a 16 channels VoIP GSM Gateway (GOIP)for call termination(VoIP to GSM and GSM to VoIP). It is SIP based and compatible with Asterisk. It can enable to make 16 calles simultaneously from IP phone to GSM network and GSM network to IP phone.

Main Functions:
(1) VoIP(SIP),GSM/UMTS conversion
(2) Following me function
(3) For call termination(VoIP to GSM) and origination(VoIP to GSM)
(4) Web Setting and Management
(5) IMEI changeable
(6) Supply two set extension to connect
(7) Incoming call display, and hide caller number(CLI)
(8) 16 ports with 64 SIM, it can be switch automatic
Specification:
Protocols:H.323,SIP (RFC3261) compliance
Codec:G.711u-Law ,G.711a-Law,G.723(5.3k),G.723(6.3k),G.729AG
TCP/IP:IP/TCP/UDP/RTP/RTCP/CMP/ARP/RARP/SNTP DHCP
Frequancy: Quan band850/900/1800/1900Mhz
IVR Voice configuration
Built-in NAT/IP sharing function
Basic PBX function (Private branch exchange)
Concentrated Network Management Systems(NMS)
Peer-to-Peer mode (non-Gatekeeper)
Line hunting
16 RJ-11 FXS ports or 16 RJ-11 FXO ports
E.164 (Telephone Number Plan)
DTMF dialling
PPPoE connection
DTMF detection/generation
FSK and DTMF Caller ID
Remote configuration/reset via Telnet
LAN interface : two RJ-45 connector of 10/100 Base-T
Microsoft Netmeeting v3.0 compatible
Support static IP and DHCP
Built-in DHCP Server function
QoS by ToS (Type Of Service)
SNTP (Simple Network Ti