INCOMING-CALL CALL BACK SERVICE FOR A HANDSET ENGAGED IN CONVERSATION IN A CT2 TWO WAY SYSTEM
Original Publication Date: 1995-Jul-01
Included in the Prior Art Database: 2002-Mar-29
BACKGROUND OF THE CT2 TWO WAY CALLING SYSTEM Figure 1 shows the System Architecture of the CT2 Two Way Calling System. For a CT2 handset to receive incoming call in a call zone, the handset needs to inform the system of its location, either automatically or by manual means; and this is effected in a Registration Call from the TBS to the VLR. The information of the TBS to which the handset is registered is maintained in a database in the VLR. These information together with that ofthe VLR is then presented to the Home Location Register (HLR).