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Specifications

4 ports GSM GoIP Gateway,Unlocked phone Description 
The 4 channels GSM VoIP gateway is a 4 SIM Card Broadband Phone Gateway that had been developed by SKYLINE LTD.  GOIP_4  SIM Card Broadband Phone Gateway is a new product that connect the GSM and the VOIPseamlessly. To GOIP_4 what is installed on the Mobile SIM Card, you register the GSM telephone on the VOIP Softswitch.SIP and H.323 agreement are built in the GOIP_4 and configured flexible. Caller ID be seen by using SIP. Flexible routing meet the need of all kinds of call forwarding; even more special is that GOIP_4 support multi-device group, it be easily combined into arbitrary number of channels of Large Gateway Group.
 
 

Key Features
  • Multiple GoIP4 grouping mode
  • Provide four cellular channels for IP-PBX
  • 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 CNG)
  • Voice activity detection (VAD)
  • Auto provisioning (requires auto provisioning server)
  • On line firmware upgrade
  • Multi-language support: English and Chinese 

Hardware Specifications
  • Processor: ARM9E 133MHz
  • DSP: VPDSP101 196MHz
  • Memory: RAM 16MB/ Flash 4MB
  • GSM Module: Type: 850MHz, 900MHz, 1800MHz, 1900MHz
  • Power: Input AC100V ~ 240V, output DC12V/2A +-10%
  • Power consumption: 12W maximum
  • Network card: 100/10Base-T x2
  • LED: Operation and lines light
  • GSM Passway:four
  • Operating temperature: 10°C to 40°C (32°F to 104°F)
  • Storage temperature: 0°C to 50°C (32°F to 122°F)
  • Working Humidity: 40% ~ 90% Not congealed
  • Weight: 450 g (1 lb) (Including AC/DC Adapter)
  • Warranty: one year

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 Address Translators (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