| 摘要 |
A method for visitor access control to a building, comprising the following steps: (a) receiving, at an access node at an access restricted building, an identification code from a mobile telephone carried by a person seeking visitor access to the building, (b) determining whether the identification code is a valid one for granting access to the building; , (c) the access node sending to the mobile telephone phone an access code which is visually displayable on a display of the mobile telephone, following determination that the identification code is a valid one, (d) detecting, at an optical reader at the building, the access code displayed on the mobile telephone, (e) validating whether the access code sent by the access node is the same as the access code detected by the optical reader, (f) upon positive validation of the captured access code, granting visitor access through the access node to the building, a room in the building or an elevator and the use of the elevator. |
