Hot sale! 4 channel GSM VoIP Gateway/GoIP4

package:by carton
package box size:35.5*21*6.5(cm)
weight:1kg/pc
carton dimmension:42.5*36.5*33.5(cm)
gross weight:9.5kg/carton

Specifications

4 channel GSM VoIP Gateway/GoIP4
1.SIP&H.323,NAT
2.router, call terminal
3.4 sim card slots
4.IMEI change

4 channel GSM VoIP Gateway/GoIP4 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.  

 

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)

 

Working Process---

Product pictures(back,front &side view)

  Dear customers, I'm very glad you are interested in our products, thanks for your concern and support for our company. We promise to provide you high quality and reasonable price products. If you have any doubts or problems whenever before or after buying our products, we can give you technical assistant, just please sent me an e-mail, phonecall or contact me on line. We are looking forward for cooperation with you!