Nortel Networks Corporation

Northern Telecom Limited

Motorola Corporation

Edgar Martinez

Charles Richard Wiebe

Adrian Giuhat

Locillo Giuseppe Pino

Randall R Stewart

Sanjay Kulkarni

Tom Joyner

Harminder Singh

Jin Chen

Sonu Mirchandani

Rich Noradt

James Bender

Laxminarayan G Iyengar

De D Cai

Paul Shepherd

Mahmoud N Bargout

Method and apparatus for routing emergency services calls in an intelligent network

Method and system are provided for efficient telephone number portability within a geographically dispersed telephony and the like switching system, wherein ported telephone numbers, when dialled and found non-existent at their number-inherent destination, a &ldquo;Release Treatment&rdquo; with a trigger (automatic flexible routing) searches in a database from the originating switching node or office, whereupon their new network node address is directly connected to following normal routing procedures; thus permitting realistically affordable telephone number portability, particularly local number portability (LNP).

Geographically distributed telephony

A method and apparatus for a handover of a communication signal ( ) associated with a mobile communication unit ( ) between a Generic C-based wireless communication system ( ) and a MSC-based wireless communication system ( ), is disclosed. The handover method includes establishing a plurality of trunks ( ) between a landline switch ( ) and a MSC ( ). The method also includes configuring a landline number routing table ( ) and a landline trunk group table ( ) in the landline switch ( ), a mobile trunk group table ( ) in the MSC ( ), and establishing a message translation table ( ) in the computing platform ( ), such that one of the plurality of trunks and an associated signaling path to the computing platform ( ) are always selected when the handover is required.

Method and apparatus for completing a handover between wireless communication systems

In an intelligent network comprising a plurality of Service Signalling Points (SSP) and a Service Control Point (SCP), improved handling of overload conditions at the Service Control Point is provided by means of a Network Signalling Point interposed between the SSPs and the SCP. The Network Signalling Point (NSP) has a store for storing a copy of each message the NSP sends to various Point Codes, including that of the SCP; and service software for monitoring its links based upon associated Point Codes. If the NSP does not receive, within a preset time period, a response to a message sent to a particular destination Point Code via a particular link that is intact, the service software module will retrieve the stored copy of the message, replace the original destination Point Code with an alternative Point Code, and route the modified message to the alternative Point Code. The NSP may also filter Automatic Code Gapping messages sent from the Service Control Point to Service Switching Points in dependence upon messaging network conditions. The NSP may also generate its own Automatic Code gapping messages and send them to selected Service Switching Points.

Intelligent network with alternate routing of signalling messages, and

A method and system are disclosed for extending the directory number of a terminal. The invention allows service providers to provide a service which uses an existing subscriber directory number and effectively extends it to include one or more other directory numbers. To the subscriber, the terminals associated with the other directory numbers effectively look like virtual extensions. The method and system provide this flexibility without requiring any additional personal numbers being assigned to the subscriber. The subscriber can choose to have all incoming calls to a directory number (DN) of one of their existing terminals alert or ring one or more other terminals having a different DN. The terminals may for example be on the same network (e.g. all on the wireline network) or they may be on different networks (e.g. one on the wireline network and one on the wireless network). The method and system are substantially transparent to subscribers and calling parties as no additional numbers or new DNs of any sort are required.

Method and system for extending the directory number of a terminal

In a telephone network having a plurality of network nodes, each having a unique network address and using out-of-band signalling for call setup and routing, a method is provided for the routing of calls to a 'ported' directory number which has been ported from a donor network node to a recipient network node. The method comprises the steps of (i) routing the call, using the ported directory number as the Called Party Number, from an originating network node towards the donor network node; (ii) intercepting the call at an intermediate network node between the originating network node and the donor network node, through which intermediate network node calls to the donor network node must pass; (iii) converting the ported directory number to a network address of the recipient network node; (iv) routing the call to the recipient network node using said network address; and (v) at the recipient network node, completing the call to the ported directory number.

Redirection of calls to ported directory numbers in telephone networks

Portability of directory numbers in telephone networks, particularly so-called intelligent networks, may be provided without modification of the call processing software at originating network node switches, by associating each call to a ported number with an Initial Address Message comprising a Location Routing Number for the recipient switch as the Called Number and the ported directory number as the Original Called Number. At a boundary with a network which uses a Location Routing Number, a Generic Address Parameter and a Forward Call Indicator flag for identifying calls to ported numbers, a network element creates a modified routing message by converting the Original Called Number to a Generic Address Parameter and setting a Forwarded Call Indicator flag to indicate a translated originally-dialled called number. The network element then uses the converted Initial Address Message to route the call into the second network. Public Office Dialling Plan or Termination Attempt triggers may be used to interrupt processing of a call to the ported number and initiate a query to a Service Control Point database for the corresponding Location Routing Number for inclusion in the Initial Address Message. Alternatively, call forwarding at the donor switch may be used to provide the Location routing Number for the originating switch to include in the Initial Address Message.

Directory number portability in telephone networks

Method and system are provided for efficient telephone number portability within a geographically dispersed telephony and the like switching system, wherein ported telephone numbers, when dialled and found non-existent at their number-inherent destination, a 'Release Treatment' with a trigger (automatic flexible routing) searches in a database from the originating switching node or office, whereupon their new network node address is directly connected to following normal routing procedures; thus permitting realistically affordable telephone number portability, particularly local number portability (LNP).

Growing community of inventors

Arlington Heights, IL, United States of America

Edgar Martinez