USOO8848894B2
`
`US 8,848,894 B2
`(10) Patent No.:
`(12) United States Patent
`Wood et al.
`(45) Date of Patent:
`*Sep. 30, 2014
`
`
`(54) TANDEM ACCESS CONTROLLER WITHIN
`THE PUBLIC SWITCHED TELEPHONE
`NETWORK
`
`(58) Field of Classification Search
`USPC ............................ .. 379/211.01; 370/401, 352
`See application file for complete search history.
`
`(75)
`
`Inventors: Samuel F. Wood, Los Altos, CA (US);
`Jerry A. Klein, Los Altos, CA (US);
`Margaret Susan Asprey, Los Altos, CA
`(US)
`.
`.
`.
`(73) Ass1gnee: Focal IP, LLC, Wllmmgton, DE (US)
`( * ) Notice:
`Subject to any disclaimer, the term of this
`patent is extended or adjusted under 35
`U.S.C. 154(b) by 0 days.
`
`(56)
`
`References Cited
`
`US. PATENT DOCUMENTS
`
`4,100,377 A
`4,238,851 A
`
`7/1978 Flana an
`12/1980 Takahishi et 31.
`(Continued)
`
`FOREIGN PATENT DOCUMENTS
`
`This patent is subject to a terminal dis-
`claimer.
`
`DE
`EP
`
`19813179
`0578374
`
`9/1999
`1/1994
`
`(21) Appl. No.: 13/358,353
`
`(Continued)
`
`Filed:
`
`(22)
`(65)
`
`Jan. 25, 2012
`Prior Publication Data
`
`OTHER PUBLICATIONS
`RFC 3298 Service in the PSTN, Aug. 2002.
`
`Us 2012/0120853 A1
`
`May 17, 2012
`
`(Continued)
`
`Related US. Application Data
`(63) Continuation of application No. 11/428,822, filed on
`Jul. 5, 2006, now Pat. No. 8,155,298, which is a
`continuation of application No. 10/426,279, filed on
`Apr. 30, 2003, now Pat. No. 7,324,635, which is a
`continuation-in-part of application No. 09/565,565,
`filed on May 4 2000 now Pat NO 6 574 328
`’
`’
`'
`'
`’
`’
`'
`
`(51)
`
`Int Cl
`H02/42
`H04L 12/66
`H04g 3/00
`H04g 3/72
`H04M 7/00
`H04Q 3/66
`H04L 29/06
`H04M 7/12
`(52) US. Cl.
`CPC .. H04L 65/1046 (2013.01), H04Q 2213/13034
`(2013.01), HO4Q 2213/13109 (2013.01),
`
`2006 01
`(2006'01)
`(
`‘
`)
`(200601)
`(200601)
`(200601)
`(200601)
`(2006.01)
`(2006.01)
`
`Primary Examiner 7 Sonia Gay
`(2732113505114? Agem’ orFlrm 7 Blakely’ SOkOlOff’ Tay10r&
`’
`
`ABSTRACT
`(57)
`1 d
`TAC
`11
`d
`1 d
`.
`A
`)Coup e
`System me u es atan em access comm .er (
`to a PSTN, where the TAC allows a subscriber to set-up and
`make changes to the configuratlon of his/her phone lme or
`other communications device. Such changes include selec-
`tive call forwarding. The TAC is controlled by the subscriber
`using the web. The TAC is coupled internally to the PSTN in
`a local service area and is outside the subscriber’s central
`ofiice. A calling party makes a first call to the subscriber using
`the subscriber’s public telephone number. The TAC receives
`the first call prior to the call reaching the subscriber’s termi-
`nating central ofiice. The TAC then carries out the subscrib-
`er’s instructions for the first call, such as making one or more
`second calls using telephone numbers different from the sub-
`scriber’s public telephone number. When the second call is
`answered, the answering phone is connected by the TAC to
`the caller.
`
`(Continued)
`
`22 Claims, 11 Drawing Sheets
`
`\ 1
`
`8
`
`CO
`
`_
`
` 16
`
`PSTN
`TANDEM SWITCH
`
`\ /
`TANDEM
`ACCESS
`CONTROLLER
`
`1o
`
`/1
`
`CO
`
`7
`
`\ O E
`
`Secure
`Protocol
`
`23
`
`—'
`
`
`E
`
`User
`Interface
`
`22
`
`n
`
`as
`14“ ’5’ O @
`129[
`
`” YMAX EXHIBIT 1038
`
`000001
`
`YMAX CORP. v. FOCAL IP
`|PR2016-O1258
`
`000001
`
`YMAX EXHIBIT 1038
`YMAX CORP. V. FOCAL IP
`IPR2016-01258
`
`

`

`US 8,848,894 B2
`
`Page 2
`
`(52) us. Cl.
`CPC ........................................................................ ..
`
`H04Q 3/005 (2013.01); H04Q 2213/13091 (2013.01);
`H04Q 2213/13332 (2013.01); H04Q 2213/1313
`H04Q
`(2013.01);
`H04M 7/12
`(2013.01);
`H04M 3/421 61
`2213/13242
`(2013.01);
`H04M
`(2013.01);
`H04Q 3/72
`(2013.01);
`3/42153 (2013.01); H04M 7/0009 (2013.01);
`H04Q2213/13097(2013.01);H04Q2213/13389
`(2013.01); H04Q 3/0025 (2013.01); H04Q 3/66
`(2013.01); H04Q 2213/13141 (2013.01); H04M
`3/42229 (2013.01); H04Q 2213/13103 (2013.01)
`USPC .................................... .. 379/211.01; 370/352
`
`(56)
`
`References Cited
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`
`>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
`
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`5,606,594
`5,608,786
`5,613,069
`H1641
`5,621,727
`5,625,677
`5,628,004
`
`>>>E>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> *
`
`*
`
`3/1994
`3/1994
`4/1994
`4/1994
`5/1994
`7/1994
`8/1994
`9/1994
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`000002
`
`Morgan et al.
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`Schmidt et al.
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`
`.. 719/328
`
`............. ..
`
`000002
`
`

`

`US 8,848,894 B2
`
`Page 3
`
`(56)
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`
`.......... .. 379/204.01
`
`.......... .. 370/356
`
`000003
`
`

`

`US 8,848,894 B2
`
`Page 4
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`(56)
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`
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`................. .. 379/88.21
`
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`3/1998
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`
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`9/1998
`
`10/1998
`11/1998
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`4/1999
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`
`FOREIGN PATENT DOCUMENTS
`
`Ep
`EP
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`EP
`
`0704788
`0738093
`0 789 470
`0 794 650
`0 797 373
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`
`000004
`
`000004
`
`

`

`US 8,848,894 B2
`Page 5
`
`(56)
`
`WO
`WO
`WO
`WO
`WO
`WO
`WO
`WO
`WO
`
`References Cited
`FOREIGN PATENT DOCUMENTS
`
`WO99/45687
`W001/05078
`W001/24496
`W001/24498
`W001/24500
`W001/24501
`W001/24502
`W001/24503
`WO/0184859
`
`9/1999
`1/2001
`4/2001
`4/2001
`4/2001
`4/2001
`4/2001
`4/2001
`11/2001
`
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`
`* cited by examiner
`
`000005
`
`000005
`
`

`

`US. Patent
`
`Sep. 30, 2014
`
`Sheet 1 of 11
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`US 8,848,894 B2
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`US. Patent
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`Sep. 30, 2014
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`U.S. Patent
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`Sep. 30, 2014
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`U.S. Patent
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`Sep.30,2014
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`US 8,848,894 132
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`

`U.S. Patent
`
`Sep. 30, 2014
`
`Sheet 5 of 11
`
`US 8,848,894 132
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`

`US. Patent
`
`Sep. 30, 2014
`
`Sheet 6 of 11
`
`US 8,848,894 B2
`
`lnbound Call (to Subscriber)
`
`®
`
`Receive Incoming Call
`Request (887) from
`PSTN Tandem Office.
`
`Format Message: lncomin Cell
`Request (including called PN,
`caller ID, channel #, etc.)
`
`Look up Calling and Called
`Parties in Database.
`
`Nit/niacin
`
`No'
`
`Refuse call.
`
`Yes
`
`
`Look u Subscriber specified arameters
`in da
`ase. Determine if add tional
`information is required from caller.
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`Required?
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`IVR Subsystem
`obtains information
`
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`[9.9. collect password
`
`
`from caller. etc).
`
`YES
`
`Determine outbound callin number:'Look
`up Subscriber Conditiona Call Fonlvard
`information (9.9. time-of—day, day-of-week,
`caller ID, caller password, etc).
`
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`to PSTN Tandem.
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`
`Connect this outbound .call
`to oriinal inbound call.
`
`@ FIG. 5
`
`000011
`
`000011
`
`

`

`US. Patent
`
`Sep. 30, 2014
`
`Sheet 7 of 11
`
`US 8,848,894 B2
`
`Outbound Call (from Subscriber!
`
`
`
`Subscriber enters or clicks on
`
`
`
`Outbound Called Number at U13
`and indicates which Subscriber
`on phone
`
`
`number cell is to be placed from
`
`(3.9. cell or home number)
`
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`
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`
`
`via phone
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`off 'hook‘
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`
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`CO processes
`UlS Formats and Sends a
`dialing and
`
`CailAndConnect Messa e to TAG.
`look up
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`
`TAC places call
`to Subscriber.
`
`
`
`Send messages to'
`UIS- Subscriber
`
`
`Phone Not
`
`
`
` PSTN places call
`Answering
`
`in conventionai
`
` manner
`TAC places caii to
`outbound number and
`connects the two.
`
`
`
`
`
`
`000012
`
`000012
`
`

`

`US. Patent
`
`Sep. 30, 2014
`
`Sheet 8 of 11
`
`US 8,848,894 B2
`
`_ '8
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`

`

`US. Patent
`
`Sep. 30, 2014
`
`Sheet 9 of 11
`
`US 8,848,894 B2
`
`8
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`US. Patent
`
`Sep. 30, 2014
`
`Sheet 10 of 11
`
`US 8,848,894 B2
`
`CALLER 1D (CID) FLOWCHART
`
`Call
`
`74
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`
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`
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`
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`
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`
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`
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`$4
`
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`
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`
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`
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`
`

`

`US. Patent
`
`Sep. 30, 2014
`
`Sheet 11 of 11
`
`US 8,848,894 B2
`
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`

`

`US 8,848,894 B2
`
`1
`TANDEM ACCESS CONTROLLER WITHIN
`THE PUBLIC SWITCHED TELEPHONE
`NETWORK
`
`RELATED APPLICATIONS
`
`This application is a continuation of US. application Ser.
`No. 11/428,822, filed Jul. 5, 2006 now US. Pat. No. 8,155,
`298, which is a continuation of US. application Ser. No.
`10/426,279, filedApr. 30, 2003 now US. Pat. No. 7,324,635,
`which is a continuation-in-part of US. application Ser. No.
`09/565,565, now US. Pat. No. 6,574,328, filed May 4, 2000,
`all three of which are incorporated herein by reference.
`
`FIELD OF THE INVENTION
`
`This invention relates to telephone services and, in particu-
`lar, to a system for allowing a subscriber to select features of
`the subscriber’s telephone service and to various novel fea-
`tures that can be selected.
`
`BACKGROUND OF THE INVENTION
`
`People have used various means for limiting interruptions
`due to the telephone. In the past, people used switchboards
`and secretaries to screen incoming, or inbound, calls. Voice
`mail systems took over some ofthis role both in the home and
`in the central office. Today, there are web-based companies
`managing 3rd-party call control, via the toll-switch network,
`which allow users to enter call control information through a
`web portal. There are also edge devices in each of the public
`telephone company’s central offices which provide local con-
`trol, but offer an extremely limited number of features and do
`not provide true 3rd-par‘ty call control.
`The web-based toll systems provide good user interaction
`but they are not economical and cannot take advantage of
`local number portability because they do not provide local
`control and connectivity.
`The Public Switched Telephone Network (PSTN) consists
`ofa plurality ofedge switches connected to telephones on one
`side and to a network of tandem switches on the other. The
`
`tandem switch network allows connectivity between all ofthe
`edge switches, and a signaling system is used by the PSTN to
`allow calling and to transmit both calling and called party
`identity.
`Until now, optional features were provided by the local
`service telephone company (telco) through the edge switch at
`the central office (CO). It was not possible to provide optional
`features through any other means. Control of these features
`was done through the first party (calling party) or the second
`party (called party), or worse yet, manually by calling the
`business office.
`
`In the past, numerous devices have been built that allow the
`connection of two lines together at an edge switch. These
`devices can be used to add features to a telephone network by
`receiving a call on one line and then dialing out on another
`line. The problem with these devices is that, because they are
`connected through an edge switch, transmission losses and
`impairments occur, degrading the overall connection. In addi-
`tion, signaling limitations prevent full control, by the sub-
`scriber or the system, over the call.
`A preferred embodiment ofthe inventive system described
`herein connects at the tandem, thereby eliminating these
`problems.
`In the edge devices residing in the PSTN central offices, the
`1st party (the calling party) has numerous features available
`(dialing options). The 2nd party (called party) also has
`
`10
`
`15
`
`20
`
`25
`
`30
`
`35
`
`40
`
`45
`
`50
`
`55
`
`60
`
`65
`
`2
`
`options available such as call forwarding, but these features
`typically require access from the first or second party’s device
`and are extremely awkward to program. The user interaction
`is not only awkward, it is limited and requires interaction with
`the telephone company to provision them. In other words,
`past systems for provisioning, meaning addition, modifica-
`tion, or control of telephone features, required a subscriber to
`make the feature selection through the telephone business
`office. Central office workers would then implement the pro-
`visioning under request of the business office.
`Call Forwarding is one popular provision. There is signi-
`fication transmission degradation for Call Forwarding to take
`place. The calling party pays for a call to the edge device, and
`the edge subscriber, the called party, pays for the call to the
`forwarding number. For enhanced inbound call control to
`occur, a direct 3rd-party call control means is needed.
`A variety of services have arisen to address the problems
`mentioned above. Many of these systems allow the called
`party to make changes to his/her call forwarding attributes
`which do not allow direct 3rd-party call control. These ser-
`vices provide good user interaction, some via the intemet, but
`they rely upon the toll network through the use of “800”
`numbers.
`
`This requires the subscriber to pay by the minute and does
`not allow the subscriber to take advantage of number port-
`ability in order to obtain 3rd-party call control. There are
`other toll network mechanisms for remote call forwarding.
`For example, MCI offers a service where the customer can
`remotely change the forwarding target number for “800”
`numbers. Contacting the ultimate end-user before terminat-
`ing the first incoming call is similar to the manner in which
`“800” credit calls and collect calls are processed, but these are
`not done at the local subscriber level.
`
`In addition to these toll services, there are edge devices that
`perform some of the same services. Edge devices such as
`phones and PBXs that include voice mail, inter-active voice
`response, call forwarding, speed calling, etc., have been used
`to provide additional call control. These devices allow the
`phone user direct control over incoming and outgoing calls.
`The disadvantage of edge devices is that they add cost,
`degrade voice and transmission quality, can be difficult to
`program, are not easily programmed remotely, can require the
`user to pay for two lines, provide lower quality of service, and
`cannot provide the same level of functionality as a system that
`controls the PSTN directly. There are Voice Over Internet
`Protocol (VoiP) products emerging that provide better user
`interfaces and control but they do not take advantage and
`voice quality of the PSTN.
`
`BRIEF SUMMARY OF THE INVENTION
`
`A system for allowing a subscriber to remotely control
`features is described herein along with various telephone
`features that may be programmed into the system. A sub-
`scriber may be any customer using the telephone service, in
`contrast to employees of the PSTN who may use special
`communication networks within the PSTN.
`
`The present invention adds direct control of third party call
`control features, but does not suffer from any of the disad-
`vantages listed above, and allows the subscriber to manage
`his/her telephone system in a dynamic and exceptionally
`useful manner that is not currently available through the exist-
`ing PSTN. The invention allows enhanced direct third-party
`call control features, such as selective call routing and remote
`dialing, to be added to the PSTN (Public Switched Telephone
`Network) using local call control and providing dynamic
`provisioning ofthe syste