Origin	Taiwan
Model Number	MV-374
Brand Name	PORTech

MV-374 is a 4 channels VoIP GSM/CDMA/UMTS Gateway for call termination (VoIP to GSM/CDMA/UMTS ) and origination ( GSM/CDMA/UMTS to VoIP). It is SIP based and compatible with Asterisk,SIP Proxy Server,VoipBuster. It can enable to make 4 calls simultaneously from IP phones to GSM/CDMA/UMTS networks and GSM/CDMA/UMTS networks to IP phone.  

User just send call to MV-374 IP:5060 port from Asterisk/IP PBX 
The call automatically switches from a busy line to available line.
*5060 port can be changed
*just set one sip trunk in asterisk.simultaneous 4 calls 

Major Function

1.   VoIP(SIP),GSM conversion.(MV-374)   2.   VoIP(SIP),CDMA conversion.(MV-374C) - CDMA 2000(800/1900MHz)   3.   VoIP(SIP),UMTS conversion.(MV-374U) for all world and Japan (SoftBank Mobile/Docomo)   4.   50 sets of LAN --> MOBILE routes setting,50 sets of MOBILE --> LAN routes setting. -Support one stage diaing *When lan phone and MV-374 both register SIP proxy Server or Asterisk or VoipBuster, you can dial any destination number from lan phone directly. *Please note,SIP proxy Server,Asterisk need to have the route of destination number. VoipBuster need to have credit. -Support free mode-two stage dialing and assigned mode-one stage dialing   5.   Voice response for setting and status(dial in from mobile).   6.   For call termination (VoIP to GSM/CDMA/UMTS ) and origination ( GSM/CDMA/UMTS to VoIP).   7.   Standard SIP(RFC2543,RFC3261) protocol,Communicates with other gateway or PC   8.   Receive SMS and Send SMS (CDMA version,sms feature is unavailable)   9.   Allows your program Send/receive SMS with AT Command   10.   Call Back feature   11.   All functions can be set on web.

Specification

Protocols:SIP (RFC2543,RFC3261)     TCP/IP:IP/TCP/UDP/RTP/RTCP/,CMP/ARP/RARP/SNTP,DHCP/DNS Client,IEEE802.1P/Q,ToS/DiffServ,NAT Traversal,STUN,uPnP,IP Assignment,Static IP,DHCP,PPPoE     Codec:G.711 u-Law,G.711 a-Law,G.729A,G.729A/B Voice Quality,VAD,CNG,AEC,LEC,Packet loss     Frequency: Quad Band:900/1800/1900/850MHZ 3G/UMTS Version for all world and Japen (SoftBank Mobile/Docomo) 3G:EDGE/GPRS 850, 900, 1800, 1900 MHz / HSDPA/UMTS 850, 1900, 2100 MHz CDMA 2000(800/1900MHZ)

Option SBK-32:32 sims Remote SIM Bank

Connect with PORTech GSM Gateway via internet.
SIM cards no longer need to be installed in GSM Gateway anymore;
You can deploy your GSM Gateway in different locations.
Centralize and supervise all SIMs in one place.