Method and system for processing telephone calls via a remote tie-line
First Claim
1. A method for efficiently routing a call from a private telecommunications network through a public switched telephone network (PSTN) and a plurality of trunk groups, including at least one private trunk group, the method comprising:
- setting a called party ID to correspond to an automatic selection of facilities-remote tie-line (ASF-RTL) telephone number;
routing the call from a first switch to a switch hosting the ASF-RTL telephone number via a public trunk group; and
routing the call from the switch hosting the ASF-RTL telephone number to a private customer facility hosting the called party number via a private trunk group.
3 Assignments
0 Petitions
Accused Products
Abstract
A method and system include routing telephone calls from multiple private networks via public lines and trunks in a public switched telephone network (PSTN) to a host switch, at which the connections would begin to run parallel. The host switch routes the telephone calls via a private trunk group to a private facility, such as an electronic tandem network (ETN) node or an asynchronous transfer mode (ATM) switch. If the private trunk group is full or unavailable, the host switch routes the telephone calls over alternate private or public trunk groups and selected carriers.
2 Citations
25 Claims
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1. A method for efficiently routing a call from a private telecommunications network through a public switched telephone network (PSTN) and a plurality of trunk groups, including at least one private trunk group, the method comprising:
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setting a called party ID to correspond to an automatic selection of facilities-remote tie-line (ASF-RTL) telephone number;
routing the call from a first switch to a switch hosting the ASF-RTL telephone number via a public trunk group; and
routing the call from the switch hosting the ASF-RTL telephone number to a private customer facility hosting the called party number via a private trunk group. - View Dependent Claims (2, 3, 4, 5)
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6. A method for efficiently routing a call to a called party number from a private telecommunications network through a public switched telephone network (PSTN) and a plurality of trunk groups, including at least one private trunk group, the method comprising:
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querying a service control point for call processing instructions for the call, the query comprising a calling party ID corresponding to a calling party number and a called party ID corresponding to the called party number;
identifying whether the call is subject to automatic selection of facilities-remote tie-line (ASF-RTL) processing;
when the call is subject to ASF-RTL processing, setting the called party ID to correspond to an ASF-RTL telephone number and setting an original called party ID to correspond to the called party number;
transmitting from the service control point to an originating service switching point call processing instructions, the call processing instructions comprising the calling party ID, the called party ID and the original called party ID;
routing the call to a host service switching point corresponding to the called party ID;
querying the service control point for additional call processing instructions, the query comprising the calling party ID, the called party ID and the original called party ID;
determining additional call processing instructions, comprising at least one private trunk group through which to route the call, and resetting the called party ID to correspond to the original called party ID;
transmitting the additional call processing instructions from the service control point to the host service switching point; and
routing the call from the host service switching point to a private switching facility of the customer via the at least one private trunk group. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 15, 16, 17, 19, 20, 21, 22, 23, 24, 25)
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14. A system for efficiently routing a call from a private telecommunications network through a public switched telephone network (PSTN) and a plurality of trunk groups, including at least one private trunk group associated with an automatic selection of facilities-remote tie-line (ASF-RTL) telephone number, the system comprising:
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a service control point that processes telephone calls;
a first service switching point that queries said service control point in response to the call from the private telecommunications network;
a second service switching point comprising a host switching point for the at least one private trunk associated with the ASF-RTL telephone number; and
a third service switching point comprising a private facility of the customer;
wherein said service control point determines from the query whether the call is subject to routing through said second switching point, and if so, instructs said first service switching point to route the call to said second service switching point, and wherein said second service switching point routes the call to said third service switching point via the private trunk group associated with the ASF-RTL telephone number.
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18. A system for efficiently routing a call from a private telecommunications network of a customer through a public switched telephone network (PSTN) and a plurality of trunk groups, including at least one private trunk group, the system comprising:
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a service control point that processes telephone calls, said service control point comprising an automatic selection of facilities-remote tie-line (ASF-RTL) routing database;
an originating service switching point that launches a trigger to said service control point in response to a call initiated at a telephone in the private telecommunications network of the customer;
a host switching facility that hosts an ASF-RTL telephone number associated with the at least one private trunk group, said host switching facility receiving the call from said originating service switching point based on instructions from said service control point; and
a private switching facility that hosts at least a second private telecommunications network of the customer, said private switching facility connecting to said host switching facility by at least the private trunk group and receiving the call from said host switching facility based on routing instructions from said service control point;
wherein said service control point receives a calling party ID and a called party ID corresponding to the call from said originating service switching point and determines from the ASF-RTL routing database whether the call is subject to ASF-RTL routing;
wherein, if the call is subject to ASF-RTL routing, said service control point sets the called party ID to be the ASF-RTL telephone number associated with the at least one private trunk group so that said originating service switching point forwards the call to said host switching facility; and
wherein the routing instructions comprise transmitting the call from said host switching facility to said private switching facility via the at least one private trunk group.
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Specification