50pcs Agent Price 8Port GSM VoIP Gateway

GoIP GSM Gateway bridges the GSM and the IP networks by enabling voice communications. It is installed on the Mobile SIM Card, you can register the GSM telephone on the VOIP Softswitch. It can be easily combined into arbitrary number of channels of Large Gateway Group. Low price, perfect sound quality and powerful function make GOIP GSM inevitable choice of system Integrators, traffic Business and soft switch Manufacturers.
• Support dual protocols: ITU-H.323 V4 and IETF SIP V2
• GSM module for making GSM calls
• Provide 1&4 Sim Card ports for GSM extensions
• Support G.711 A/μ law, G.729A/B, G.723.1 Codecs
• Support Multiple dial plans and line hunt
• Support QoS, NAT transversal and router function
• Support VAD, CNG, EC
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 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
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:160 mm (W) x 252 mm (L) x 30 mm (H) (Width x Length x Heigth
Power: 12 Vdc 2A (AC/DC adapter included)
Safety:
Emissions:
Immunity:
Other Approval:
Warranty: one year