Patent ID: 7065196

Claim:
An entrance intercom system, fabricated on the gate of a community, providing the functions of communicating between visitors and residents, identity recognizing, locking/unlocking the gate, said entrance intercom system comprising: a data base, storing the resident codes, the phone numbers and the identity recognizing codes of the residents of the community; a communication module, coupled with public switch telephone networks, providing the communicating function between the visitors and the residents, and receiving the incoming phone calls; a CPU, connected with said data base and said communication module respectively, responsive to the resident codes input by the visitors via a dialing keyboard, to select the phone numbers of the resident stored in said data base, and to drive said communication module automatically to dial the resident for providing the communicating function between the visitors and the resident; an incoming phone numbers collecting module, connected with said communication module and said CPU respectively, collecting the incoming phone numbers, said CPU compares said incoming phone numbers and the phone numbers of the residents stored in said data base, when the incoming phone number is identical to one of the phone numbers of the residents in said data base, said CPU will send a signal to unlock said gate; a RF identification device, for detecting the RF messages of identity recognizing and sending to said CPU, said CPU compares said RF messages with said identity recognizing codes stored in said data base, when said RF message is identical to that of the resident in said data base, said CPU will send a signal to unlock said gate; and a remote control receiving means, for receiving remote control messages of identity recognizing and sending to said CPU, said CPU compares said remote control messages with the identity recognizing codes stored in said data base, when the remote control message is identical to one of the identity recognizing codes of the residents, said CPU will send a signal to unlock said gate, wherein said phone numbers of the residents stored in said database includes wired telephone numbers and cellular phone numbers of the residents, and when the incoming phone number of the cellular phone collected by said incoming phone number collecting module is identical to one of the phone numbers stored in said database, said CPU will send a signal to unlock said gate, whereby the resident utilizes a cellular phone to dial said entrance intercom system for unlocking said gate.