GSM controller never connects
A
SeNd Technology product story
Edited by the Engineeringtalk editorial team
Jun 15, 2004
GSMRemote is a simple device for use in access control industries such as car-park barriers, security gates etc.
GSMRemote is a simple device for use in access control industries such as car-park barriers, security gates etc.
The simple-to-use device, based around GSM technology, enables multiple, authorised users the ability to remotely open and close their gates at home or "unlock" the door to the office.
By using CLIP (caller line identification presentation) when a user "rings the unit" the GSMRemote checks to see if the calling number is listed in its phone book and if so, switches on its output in turn operating the gate or door control system.
The compact, low cost GSMRemote has a single changeover relay that can be triggered to switch on then off by consecutive calls or it can be active for a time period of between 1 and 10s.
Because this simple yet clever device uses CLIP, the call does not connect and the user is not charged for the call.
The unit is secure by only operating if the user's phone number is in its own phone book.
It can also be set to send a text message back to the user to confirm the action has been carried out.
Two LEDs show GSM signal and output status.
The GSMRemote is also suitable for asset management as it enables users to remotely shut down plant or machinery when it should not be in use or has not been paid for.
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