Abstract: A method and system for increasing compatibility among telecommunications networks using different types of signaling systems. Current location information for a mobile station is stored in a register. Subsequently, a telecommunication node attempting to access the mobile station requests current location data from the register. It is determined, however, that the stored location information is incompatible with a signaling system used by the telecommunication node. As a result, a physical address that corresponds to the stored location information is identified as being compatible with the signaling system. The identified physical address is then used to perform the access of the mobile station. In accordance with one embodiment of the invention, the attempted access of the mobile station is for purposes of delivering a short message service (SMS) message. In another embodiment, the attempted access comprises an attempt to set up an international call connection.

Abstract: A global roaming system and method for allowing a subscriber to roam between first and second cellular telecommunications systems having non-compatible air interfaces where the subscriber has a subscription in the first cellular telecommunications system and has at least one mobile terminal adapted to operate with the non-compatible air interfaces. The global roaming system includes a home location register (HLR) associated with the first cellular telecommunications system for storing a service profile including one directory number for the subscriber that includes fields for storing number pairs comprising a mobile identification number (MIN) and a mobile serial system number (ESN) where each number pair is recognizable by at least one of the first and second cellular telecommunications systems. Signaling links are provided to interconnect the first and second cellular telecommunications systems with the HLR.

Abstract: For a call received by an originating switching node in a cellular telephone network that does not support all upgraded calling service features, the call is redirected and transited for further handling to an upgraded service switching node. Alternatively, the call is redirected and transited only when the originating switching node has not been ungraded to support subscripted to calling service features or a certain initiated calling service feature. As another alternative, the call is handled by the originating switching node (i.e., through connected to a service switching node) up until such time as a calling service feature is initiated, and is then redirected and transited if the initiated calling service feature is not supported.

Abstract: Each network handled call, including its original leg and all subsequently initiated related call legs, is assigned a single unique identification number. When a determination is made that the call (including any leg thereof) is to be monitored by a law enforcement agency, a switch handling the call requests a trunk connection from a monitoring center. This request includes the assigned unique identification number. The monitoring center then compares the included identification number with previously received identification numbers associated with active call monitoring operations. If the numbers match, this is indicative of the fact that the call at issue is already being monitored, and the request for a trunk connection is accordingly denied as being redundant. More efficient use of valuable monitoring center communications (trunk) and monitoring (recorder) resources is accordingly made.

Abstract: A method is disclosed for alerting a mobile subscriber within a radio telecommunication system to wait for the connection of an incoming call which may have a delayed connection time due to network congestion or the implementation of flexible alerting features utilizing alert-and-answer-before-routing techniques. In flexible alerting extension phone service, each one of a plurality of mobile stations is assigned to a single pilot directory number (PDN), and a home location register (HLR) in an originating exchange maintains a list of parameters identifying each visited mobile switching center (V-MSC) in which mobile stations identified with the PDN are believed to be currently located. The HLR places a forward service indicator code in the routing request messages that it sends to the V-MSCs. After all mobile stations identified with the PDN are paged, voice channels are seized with those that responded.

Abstract: Responsive to an incoming call made to a primary telephone number subscribing to a call transfer calling service feature, a first switching node queries a data base to retrieve at least one transfer-to secondary number. The first switching node then signals other switching nodes in the telephone network to set up an outgoing legs to each secondary number telephone. The signals transmitted by the first switching node further direct each of the other switching nodes in the network to inhibit the initiation of any call transfer service features associated with the secondary number telephones. The signals may further include a transfer service indicator and a counter identifying the number of prior call transfer which have occurred in connection with the originally received call. If the counter exceeds a given preset threshold, the other switching nodes reject further transfer of the call.