Patent EP0510861A2 successfully refreshed from Google Patents.
EP0510861A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method of rerouting telecommunications traffic
Assignee: AT&T Inc
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Filing: 1992-04-14
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Granted: —
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Expires: 2012-04-14
Abstract
Abstract 5 n7 This invention relates to a method of establishing connections over a public switched telephone network to a customer whose telephone number is in a block associated, for routing purposes, with a first telephone switching system, but who is actually served by a second telephone switching system. The facility for carrying out this method is desirable in order to serve customers who need the advanced functions of a digital switching system, who are currently served by an analog switching system, and do not wish to have their telephone number changed when they switch to being served by the digital switching system. In accordance with the invention, a common channel signaling initial address message is sent to the first system. The first system translates the telephone number of that initial address message and finds that the customer for that telephone number is now served by a second switch. The first switch then sends a release message containing the identification of the second switch back to the source of the initial address message. The source of the first initial address message then sends a second initial address message to the identified second switch and the call connection can now be established to the customer served by the second switch. During the time the customer is being moved from the first switch to the second switch, one of the two returns a "temporarily out of service" type of announcement.
Inventors
- 👤 William Jackson Bushnell
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 20:44
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/64; H04Q3/66; H04Q3/665; H04Q3/0016; H04Q3/0029; H04Q2213/00; H04Q2213/13097; H04Q2213/13103; H04Q2213/13141; H04Q2213/13282; H04Q2213/13541; H04Q2213/13547
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
111 words
A method of establishing a telephone call connection to a customer served by a first switch whose telephone number is one of a block served by a second switch, the method comprising the steps of: transmitting a first setup message from a third switch of a public switched network to the second switch; responsive to receiving said first setup message, transmitting a release message, the release message comprising the identification of the first switch to the third switch; and responsive to receiving said release message, transmitting a second setup message from the third switch to the first switch for establishing a call connection from the third switch to the first switch.
Claim 2
Independent Claim
111 words
A method of establishing a telephone call connection to a customer served by a first switch whose telephone number is one of a block served by a second switch, the method comprising the steps of: transmitting a first setup message from a third switch of a public switched network to the second switch; responsive to receiving said first setup message, transmitting a release message, the release message comprising the identification of the first switch to the third switch; and responsive to receiving said release message, transmitting a second setup message from the third switch to the first switch for establishing a call connection from the third switch to the first switch.
Claim 3
Dependent Claim
18 words
The method of claim 1 wherein said transmitting steps comprise the steps of transmitting over a data network.
Claim 4
Dependent Claim
15 words
The method of claim 2 wherein said data network is a common channel signaling network.
Claim 5
Dependent Claim
18 words
The method of claim 3 wherein said common channel signaling network comprises a plurality of signal transfer points.
Claim 6
Dependent Claim
13 words
The method of claim 1 wherein said setup messages are initial address messages.
Claim 7
Dependent Claim
88 words
The method of claim 1 wherein said step of transmitting a release message comprises the steps of: translating a telephone number received in said first setup message to fetch data for said telephone number; determining whether said data comprises data indicating that said telephone number is served by a switch other than said second switch; and if said determination indicates that said telephone is served by a switch other than said second switch, formulating a release message comprising the identification of said switch other than said second switch.
Claim 8
Dependent Claim
19 words
The method of claim 1 wherein said first, second, and third switches are part of a public switched network.
Claim 9
Dependent Claim
114 words
A first switching system comprising: means for receiving an initial address message, for identifying a called customer, from a second switching system, that transmits said initial address message; means responsive to receiving said initial address message for determining whether said called customer identified in said initial address message is served by said first switching system, and, if not, for providing an indication of an identity of a third switching system for serving said called customer; and means responsive to said determining means, for formulating and transmitting a release message to said second switching system comprising an indication of said third switching system if said called customer is not served by said telephone switching system.
Claim 10
Dependent Claim
114 words
A first switching system comprising: means for receiving an initial address message, for identifying a called customer, from a second switching system, that transmits said initial address message; means responsive to receiving said initial address message for determining whether said called customer identified in said initial address message is served by said first switching system, and, if not, for providing an indication of an identity of a third switching system for serving said called customer; and means responsive to said determining means, for formulating and transmitting a release message to said second switching system comprising an indication of said third switching system if said called customer is not served by said telephone switching system.
Claim 11
Dependent Claim
59 words
A telephone switching system comprising: means for forwarding a first initial address message destined for second switching system to a data network; and means responsive to receipt of a release message in response to said first initial address message for formulating and transmitting a second initial address message destined for a third switching system identified in said release message.
Claim 12
Dependent Claim
59 words
A telephone switching system comprising: means for forwarding a first initial address message destined for second switching system to a data network; and means responsive to receipt of a release message in response to said first initial address message for formulating and transmitting a second initial address message destined for a third switching system identified in said release message.
Claim 13
Dependent Claim
37 words
The method of claim 1 further comprising the steps of: testing whether service to the telephone number has already been activated in said second switch, and, if not, returning an announcement to a caller of said call.
Claim 14
Independent Claim
115 words
A method of establishing a telephone call connection to a customer served by a first switch whose telephone number is one of a block served by a second switch, the method comprising the steps of: transmitting a first setup message from a third switch of a public switched network to the second switch; responsive to receiving said first setup message, transmitting to the third switch a release message, the release message comprising data for identifying the first switch in the third switch; and responsive to receiving said release message, transmitting a second setup message from the third switch to the first switch for establishing a call connection from the third switch to the first switch.
Claim 15
Independent Claim
115 words
A method of establishing a telephone call connection to a customer served by a first switch whose telephone number is one of a block served by a second switch, the method comprising the steps of: transmitting a first setup message from a third switch of a public switched network to the second switch; responsive to receiving said first setup message, transmitting to the third switch a release message, the release message comprising data for identifying the first switch in the third switch; and responsive to receiving said release message, transmitting a second setup message from the third switch to the first switch for establishing a call connection from the third switch to the first switch.
Claim 16
Independent Claim
118 words
A method of establishing a telephone call connection to a customer served by a first switch whose telephone number is one of a block served by a second switch, the method comprising the steps of: transmitting a first setup message from a third switch of a public switched network to the second switch; responsive to receiving said first setup message, transmitting to the third switch a release message, the release message comprising data for identifying that said customer has been moved from said second switch; and responsive to receiving said release message, transmitting a second setup message from the third switch to the first switch for establishing a call connection from the third switch to the first switch.
Claim 17
Independent Claim
118 words
A method of establishing a telephone call connection to a customer served by a first switch whose telephone number is one of a block served by a second switch, the method comprising the steps of: transmitting a first setup message from a third switch of a public switched network to the second switch; responsive to receiving said first setup message, transmitting to the third switch a release message, the release message comprising data for identifying that said customer has been moved from said second switch; and responsive to receiving said release message, transmitting a second setup message from the third switch to the first switch for establishing a call connection from the third switch to the first switch.
References Cited (Backward Citations)
No citation records indexed.
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