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System and Method of Altering Caller ID Information for the Purposes of Sending a Short Alpha Numeric Message

IP.com Disclosure Number: IPCOM000130512D
Publication Date: 2005-Oct-25
Document File: 1 page(s) / 9K

Publishing Venue

The IP.com Prior Art Database

Abstract

Short messaging services (SMS) costs money to send each message on a mobile device. It would be beneficial to create a new, less expensive method of sending alphanumeric messages between two devices.

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CALLER ID MESSAGING

System and Method of Altering Caller ID Information for the Purposes of Sending a Short Alpha Numeric Message

Disclosed Anonymously

Short messaging services (SMS) costs money to send each message on a mobile device. It would be beneficial to create a new, less expensive method of sending alphanumeric messages between two devices.

Known existing services allow users to change the caller ID information of a call they're sending.  While the legality and desirability of this practice is questionable, the existence of the technology can enable a new form of messaging between two phones enabled to exploit the existence of the fact. 

Assuming that caller ID is limited to a mixture of 20 numbers/letters, caller A can change their "phone number" to "meet at 4 - Mike" and call caller B's phone.  Before making the call, the custom phone number is prepended with a special character sequence known by the phone client of caller B's phone to identify that the incoming call is not a phone, call but a message.

Caller B's phone, on receiving the call will note the control characters in the caller ID information, and instead of ringing the phone, will reject the call, absorb the caller ID information, and present it as a message to Caller B.  Much like SMS, caller B's phone can send back a delivery confirmation on successful receipt of the message and messages can be replied to.

While this system is not an ideal use of telephony infrastructure, going through the pain of...