Specifications

GoIP4/4-channel GSM VoIP Gateway
1.SIP&H.323,NAT
2.Peer to Peer,GSM to VoIP,VoIP to PSTN
3.4 sim card slots
4.IMEI change

GoIP-4/GSM VoIP Gateway bridges the GSM and the IP networks by enabling voice communications. It is ideal for VoIP to Local termination where a fixed telephone line (PSTN) is not available or for cellphone roaming via the a VoIP network. Significant savings on long distance charges can be realized.  

 

Working Process---

Key Features
-Open Standard VoIP Protocols (ITU H. 323 V4 and IETF SIP V2)
-Single or Multiple Server Registrations
-Two 10/100 Ethernet circuits connect to the LAN and an additional device
-GSM module for making GSM calls
-Speech quality ensured by QoS at the Ethernet and IP layers and comprehensive jitter buffer VLAN and QoS support
-NAT Transversal and Router functions
-Voice prompts, HTTP Web, Auto Provision support for configuration and updates
-Highly stable embedded Linux operating system in high performance ARM 9 Processor

Basic 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

Enhanced Features
-Dynamic selection of codec
-Advanced jitter buffer Automatic traversal of NAT and firewall
-VLAN / Qos
-Router
-Echo cancellation for Speakerphone
-Comfort noise generation (CNG)
-Voice activity detection (VAD)
-Auto provisioning (requires auto provisioning server)
-On line firmware upgrade
-Multi-language support: English and Chinese

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 Simple Traversal of User Datagram Protocol (UDP) Through Network -AddressTranslators (NATs)
-RFC 3891 SIP Replaces Header
-RFC 3892 SIP Referred-By Mechanism draft-ietf-sipping-CC-transfer-04 Session Initiation -Protocol Call Control - Transfer
-Codec: G. 711 (A/µ Law), G. 729A/B, G. 723.1
-DTMF: RFC 2833, In-band DTMF, SIP INFO

Physical and Environmental
-Operating temperature: 10° C to 40° C (50° F to 104° F)
-Storage temperature: 0° C to 50° C (32° F to 122° F)
-Weight: 500 g (1 lb) (Including AC/DC Adapter)
-Size: 105 mm (W) x 100 mm (L) x 28 mm (H) (Width x Length x Heigth
-Power: 12 Vdc 500 mA (AC/DC adapter included)

 

Product pictures(back,front &side view)

 

  

 

 

 

 

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