We do not accept P. BOXES - PLEASE PROVIDE A PHYSICAL ADDRESS. We advise you to use a reputable carrier service when returning your goods.Please check the Voltage information and make sure it matches the one in your country. In case it's not stated in the description, do ask us. We guarantee that your issue will be solved quickly. We usually respond within 24 hours on weekdays. Synway SMG4000 Wireless Gateway could be compliable with a variety of wireless/mobile protocols, It is able to bridge wireless network with IP networks efficiently, regarding to the high-demanding user requirements. GSM4000 adapts self-propelled SIM card slots, advanced built-in VoIP processors and wireless modules, and helps enterprises and SPs launch diverse cost-efficient and flexible Wireless-to-IP communication systems. SMG4000 could also be applied into a range of systems, including remote billing and charge, Mobility PBX, PSTN backup lines, VoIP localization, SMS platform and more. GSM4000 has faster system response speed than its rivals. It could connect to the IP/WIRELESS networks with minimum latency, improving the operation efficiency of the system, and increasing dialing numbers and calling frequency. SMG4000 also could detect low wireless signals promptly and convert the wireless signals into high definition IP audio and text reliably. SMG adopts a variety of brand name hardware-components, and its embedded system has been optimized continually in the field, ensuing SMG4000 maintains a better stability under the circumstance of durable high-capacity running. 4 WCDMA/GSM Channels, WCDMA Frequency: 850/1900 MHZ, GSM Frequency: 850/900/1800/1900MHZ - LAN: 1x 100Mbps Port; WAN: 1x 100Mbps Port; Up to 4 SIM Cards - For call termination (VoIP to GSM) and origination (GSM to VoIP); Power Adapter: 100-240V - T. 168 128ms Echo Cancellation, DSP-based Toll Quality Voice Compression:G.
711/723/722/729/GSM - Remote Access, DSP-enabled Codes for Better Bandwidth Efficiency and Higher Stability in Full Loading Situation. The item "Synway SMG4004-4WA WCDMA GSM 4 Port VoIP GoIP SMS SIP IAX2 Gateway IP Phone 4" is in sale since Tuesday, June 27, 2017. This item is in the category "Computers/Tablets & Networking\Enterprise Networking, Servers\VoIP Business Phones/IP PBX". The seller is "cometstarshop2" and is located in US. This item can be shipped to United States.