securitywarehouse Posted October 15, 2010 Share Posted October 15, 2010 looking for a list of GSM dialers for a door entry system. we have a 20 room sub let office building that is difficult to retro fit. the land lord now requires a door entry system. do you offer a GSM to landline call from a PAYG sim card system? Quote Link to comment Share on other sites More sharing options...
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