Telecommunications network with relocateability of subscriber number
First Claim
1. A telecommunications system having subscriber number relocateablity, the system comprising:
- a plurality of exchanges between which calls are connected; and
a subscriber location server accessed by the plurality of exchanges, for each of a plurality of subscribers the subscriber location server having a changeable mapping of a subscriber number and a network routing prefix;
the plurality of exchanges being connected to subscribers and to the subscriber location server whereby, as a calling subscriber initiates a call, a called subscriber number is forwarded to the subscriber location server, whereupon the subscriber location server determines the network routing prefix for the called subscriber number and transmits the network routing prefix to an exchange connected to the calling subscriber, and whereby a concatenation of the network routing prefix and the called subscriber number replaces an address signal field of a called party parameter such that the call can be routed.
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Accused Products
Abstract
A telecommunications domain (20) having subscriber number relocateablity includes a plurality of physical nodes or exchanges (22) between which calls are connected and a subscriber location server (30) which is connected to and accessed by each of the plurality of exchanges (22) in the domain (20). Each exchange (22) has a unique exchange identifier (ID). Generally, when a call is placed to a subscriber in the relocateability domain, a first exchange the call encounters in the domain queries the subscriber location server. When queried, the subscriber location server (30) returns a Network Routing Number (NRN) which includes a Network Routing Prefix (NRP). The Network Routing Prefix (NRP) is a node identifier (NI) for the local exchange to which the called party is connected. The exchange (22) to which the NRN is returned prepares a routing message for the call by including the Network Routing Prefix (NRP) in an Address Signal Field (ASF) of a routing message and by setting a number relocateability flag (NRF) in the routing message. Using the NRP of the routing message, the call is routed to the called party exchange (i.e., the terminating exchange). In the called party exchange, the exchange identifier is recognized as its "own" and thereafter the rest of the Address Signal Field (ASF) is analyzed to identify the called subscriber line.
193 Citations
76 Claims
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1. A telecommunications system having subscriber number relocateablity, the system comprising:
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a plurality of exchanges between which calls are connected; and a subscriber location server accessed by the plurality of exchanges, for each of a plurality of subscribers the subscriber location server having a changeable mapping of a subscriber number and a network routing prefix; the plurality of exchanges being connected to subscribers and to the subscriber location server whereby, as a calling subscriber initiates a call, a called subscriber number is forwarded to the subscriber location server, whereupon the subscriber location server determines the network routing prefix for the called subscriber number and transmits the network routing prefix to an exchange connected to the calling subscriber, and whereby a concatenation of the network routing prefix and the called subscriber number replaces an address signal field of a called party parameter such that the call can be routed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. A method of operating a telecommunications system, the method comprising:
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defining, at a subscriber location server, a changeable mapping of a subscriber number and a network routing prefix for each of plural subscribers in the system; in connection with initiation of a call by a calling subscriber, forwarding a called subscriber number to the subscriber location server; determining at the subscriber location server the network routing prefix for the called subscriber number; and using a concatenation of the network routing prefix and the called subscriber number to replace an address signal field of a called party parameter such that the call can be rotated through the telecommunications system. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76)
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Specification