Dear Friend, This is Draven from China Skyline.Our company sells goip and has huge traffic 32-128 goip is one of our production.And its feature is below: general feature: Place of Origin: Guangdong, China (Mainland) Model Number: SK-GSM32-128 Type: VoIP Gateway color: dark blue port: 32 sim cards: 128 protocol: sip & h.323 support: VPN, IMEI
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