DINSTAR DWG2004 VOIP GSM GATEWAY CAPACITY 8 GSM CHANNEL

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Dinstar DWG2008 SIP/ GSM gateway with 8 GSM channels
Applications: SIP IP PBX GSM Trunk, SIP VoIP line Gateway, SMS Server
Quad-Band GSM 850/ 900/ 1800/ 1900 MHz
1 year warranty against hardware defects

Product Overview
More calls than ever are being made/ received using mobile phones, especially with the explosion of Smartphone' s and flexible/ home working. The 1U rack mountable DWG2008 SIP/ GSM Gateway from Dinstar is a cost-effective SIP/ GSM gateway for SMEs and system integrators, and also opens up new revenue generating opportunities for service providers. The DWG2008 allows a SIP based IP PBX telephone system or VoIP line to be connected directly to the GSM cellular network, which can dramatically lower the cost of mobile calls by taking advantage of lower mobile-to-mobile tariffs. The DWG2008 is a Quad-band SIP/ GSM gateway that supports 8 GSM channels / SIM cards. The DWG2008 works with Asterisk® based IP PBXs like Elastix® , trixbox® , and AsteriskNOW® , as well as other Open Source and proprietary SIP based IP PBXs, Switch, IVR, and VoIP gateway application

Voice codecs supported include G.723.1, G.729A/ B, G.711 ( a-law and u-law)
Support for Fixed IP, DHCP, Automated NAT traversal using IETF STUN
Protocols supported include SIP RFC3261, TCP/ UDP/ IP, RTP/ RTCP, HTTP, ARP/ RARP, ICMP, DNS, DHCP, NTP, TELNET, PPPoE, STUN
Support for 8 GSM channels
1 hot-plug SIM card per GSM channel
Quad-Band GSM 850/ 900/ 1800/ 1900 MHz
Send/ receive batch SMS up to 300 characters, support for AT commands
Unstructured Supplementary Services Data ( USSD) support
Adjustable TX/ RX gain: -6db~ + 6db
Offhook Auto-Dial Hotline service
DTMF Signaling via RFC 2833 or SIP Info
Built-in PPPoE client for establishing DSL link connection with ISP
Quad 10/ 100 RJ45 ports, support router and bridge mode
LEDs provide operational status information
Support for external antenna
PIN support for locked SIM cards
Enhanced ( Carrier Grade) Echo Cancellation: ITU Rec. G 168, up to 128 ms tail size
Adaptive Jitter Buffer, Packet loss concealment ( PLC) , Comfort noise generation ( CNG) , Voice activity detection ( VAD)
HTTP Web configuration support

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