Communication protocol: GSM/4G PHASE 2/2+ (include data service)
Features
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GSM Quad-band, can work in the worldwide GSM networks, Optional 4G
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No call charges. The GSM Gate Opener rejects the call from authorized number, then the relay will turn ON/OFF on the first ring
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Secure – Using caller ID for identification, unknown callers are ignored
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Can be operated from anywhere, no distance limit
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Add or remove users by SMS Text command
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Up to 200 authorized phone numbers can be configured
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Time limitation for access, user can call in to control only during the pre-set time period
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Automatically delete expired authorized phone numbers
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Automatically report current status by SMS or call to the 1st number
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The relay close or open time is programmable
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The SMS Feedback confirmation is programmable
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Remember relay status when power failure
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One output with relay （3A/240VAC）for connecting the switch of the door or machines
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The relay action will return a SMS confirmation to the owner, this function is editable
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One wired switch: we can control it under manual control mode
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Based on GSM/4G Network, applied to many application(gates, bollards, barriers, garage doors, shutters and access doors or machines)
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Relay hold on time 0~999s
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Support Enable/Disable remember relay status when power failure
