US4510596A — Time slot assignment facilities

Claim 1

Independent Claim 194 words

In a PCM switching system having a plurality of port circuits and means for controllably establishing communication connections between selected ones of said port circuits, said establishing means including: means for generating a plurality of unique time slots in a series of cyclically recurring time slots, a first and a second and a third group of M port boards each having N of said port circuits mounted thereon, means for providing a first type of communication service by applying N pairs of said time slots to each board of said first group wherein each port circuit on said boards receives a unique pair of said time slots, and means for providing a second type of communication service by applying a first time slot of a different unique pair of said time slots to each port circuit on the ones of said port boards comprising a first half of said second and third groups of port boards and for applying the second time slot of each of said last named pairs to different ones of the port circuits on the port boards comprising a second half of said second and third groups of port boards.

Claim 2

Dependent Claim 194 words

In a PCM switching system having a plurality of port circuits and means for controllably establishing communication connections between selected ones of said port circuits, said establishing means including: means for generating a plurality of unique time slots in a series of cyclically recurring time slots, a first and a second and a third group of M port boards each having N of said port circuits mounted thereon, means for providing a first type of communication service by applying N pairs of said time slots to each board of said first group wherein each port circuit on said boards receives a unique pair of said time slots, and means for providing a second type of communication service by applying a first time slot of a different unique pair of said time slots to each port circuit on the ones of said port boards comprising a first half of said second and third groups of port boards and for applying the second time slot of each of said last named pairs to different ones of the port circuits on the port boards comprising a second half of said second and third groups of port boards.

Claim 3

Dependent Claim 66 words

The system of claim 1 wherein the time slots of each pair are assigned an odd and even time slot number, said system further comprising: means effective when providing said second type of service for applying the even numbered time slots to the port circuits comprising said first half, and means for extending the odd numbered time slots to the port circuits comprising said second half.

Claim 4

Dependent Claim 39 words

The system of claim 2 in combination with means responsive to the receipt of said odd numbered time slots for translating them into even time slot numbers and then applying them to said port circuits comprising said second half.

Claim 5

Dependent Claim 30 words

The system of claim 1 in combination with means for connecting each of the port circuits on said first group of port boards to a different pair of station devices.

Claim 6

Dependent Claim 33 words

The system of claim 4 wherein one of said station devices of each said pair comprises a data terminal while the other of said devices of each pair comprises a telephone station set.

Claim 7

Dependent Claim 228 words

In a PCM switching system having N port circuits mounted on each of a plurality of port boards and means for controllably establishing communication connections between selected ones of said port circuits, said establishing means including: means for generating a plurality of unique time slots in a series of cyclically recurring time slots, a pair of port carriers alternatively operable in a first and second mode to provide a first and second type of communication connection service, each carrier having a first and a second half, means for mounting M port boards on each carrier, means for operating said carriers in said first mode by applying M×N time slots to each carrier half via separate conductor paths for each half, a control board on each carrier half for distributing the M×N time slots received by each half to said port circuits on each half wherein each port circuit receives two time slots, means for alternatively operating said carriers in said second mode by applying M×N time slots to only a first half of each carrier over separate conductor paths for the first half of each carrier, and means including the control board on each of said first halves of each carrier for applying the received M×N time slots to the port circuits on both halves of each carrier wherein each port circuit receives only a single time slot.

Claim 8

Dependent Claim 228 words

In a PCM switching system having N port circuits mounted on each of a plurality of port boards and means for controllably establishing communication connections between selected ones of said port circuits, said establishing means including: means for generating a plurality of unique time slots in a series of cyclically recurring time slots, a pair of port carriers alternatively operable in a first and second mode to provide a first and second type of communication connection service, each carrier having a first and a second half, means for mounting M port boards on each carrier, means for operating said carriers in said first mode by applying M×N time slots to each carrier half via separate conductor paths for each half, a control board on each carrier half for distributing the M×N time slots received by each half to said port circuits on each half wherein each port circuit receives two time slots, means for alternatively operating said carriers in said second mode by applying M×N time slots to only a first half of each carrier over separate conductor paths for the first half of each carrier, and means including the control board on each of said first halves of each carrier for applying the received M×N time slots to the port circuits on both halves of each carrier wherein each port circuit receives only a single time slot.

Claim 9

Dependent Claim 65 words

The system of claim 6 wherein said last named means comprises means for applying a first time slot of a different unique pair of time slots to each port circuit on a first half of each carrier and for applying the second time slot of each of said last named pairs to different ones of said port circuits on the second half of each carrier.

Claim 10

Dependent Claim 67 words

The system of claim 7 wherein the time slots of each pair are assigned an odd and even time slot number and wherein said last named means comprises: means effective for applying the even numbered time slots to the port circuits on a first half of each carrier and for extending the odd numbered time slots to the port circuits on a second half of each carrier.

Claim 11

Dependent Claim 39 words

The system of claim 8 in combination with means responsive to the application of said odd numbered time slots for translating them into even time slot numbers and then applying them to the port circuits comprising said second half.

Claim 12

Dependent Claim 32 words

The system of claim 6 in combination with means effective when said carriers are operated in said first mode for connecting each of said port circuits to a pair of station devices.

Claim 13

Dependent Claim 32 words

The system of claim 10 wherein one of said station devices of each pair comprises a data terminal while the other of said devices of each pair comprises a telephone station set.

Claim 14

Dependent Claim 86 words

The system of claim 6 wherein said means for providing said first type of service comprises: a port data interface board on each half of each carrier, means for applying a first control potential to the port data interface boards of each carrier, and means in said port data interface boards responsive to said first control potential for applying the M×N time slots received over the conductor path for each half to the port circuits of each half wherein each port circuit receives two time slots.

Claim 15

Dependent Claim 105 words

The system of claim 12 wherein said means for providing said second type of service comprises: said port data interface board on a first half of each carrier, means for applying a second control potential to said port data interface board on said first half of each carrier, and means in said last named port data interface board of each carrier responsive to said second control potential for applying the M×N time slots received over the conductor path for said first half of each carrier to the M×N port circuits on both halves of said carriers wherein each port circuit receives a single time slot.

Claim 16

Dependent Claim 81 words

The system of claim 6 wherein said means for providing said first type of service comprises: a separate I/O cable extending to each carrier for applying I/O signals containing M×N different I/O addresses each of which is unique to a different port circuit on said carrier, and a port control interface board on each carrier responsive to the receipt of said I/O signals for extending each received I/O signal to the port circuit specified by the address portion of said signal.

Claim 17

Dependent Claim 128 words

The system of claim 6 wherein said means for providing said second type of service comprises: an I/O cable extending to said first carrier for applying I/O signals containing M×N×2 addresses each of which is unique to a different port circuit of said carriers, an I/O extension cable extending from said first to said second carrier for applying said received I/O signals to said second carrier, means including a port control interface board in each carrier for applying the received I/O signals containing even numbered port circuit addresses to an addressed port circuit on said first half of said carriers, and means in each carrier for applying received I/O signals containing odd numbered port circuit addresses to an addressed port circuit on said second half of said carriers.

Claim 18

Independent Claim 162 words

A method of operating a PCM switching system for controllably establishing communication connections between selected ones of a plurality of port circuits, said system including means for generating a plurality of unique time slots in a series of cyclically recurring time slots, said system further including a first and a second group of port circuits, said method including the steps of: (1) applying a different unique pair of said time slots to each port circuit of said first group to provide a first type of communication connection service, and (2) providing a second type of communication connection service by applying a first time slot of a different unique pair of said time slots to each of said port circuits comprising a first half of said second group of port circuits and by applying the second time slot of each of said last named pairs of different ones of the port circuits comprising a second half of said second group of port circuits.

Claim 19

Independent Claim 162 words

A method of operating a PCM switching system for controllably establishing communication connections between selected ones of a plurality of port circuits, said system including means for generating a plurality of unique time slots in a series of cyclically recurring time slots, said system further including a first and a second group of port circuits, said method including the steps of: (1) applying a different unique pair of said time slots to each port circuit of said first group to provide a first type of communication connection service, and (2) providing a second type of communication connection service by applying a first time slot of a different unique pair of said time slots to each of said port circuits comprising a first half of said second group of port circuits and by applying the second time slot of each of said last named pairs of different ones of the port circuits comprising a second half of said second group of port circuits.

Claim 20

Dependent Claim 69 words

The method of claim 16 wherein the time slots of each pair are assigned an odd and even time slot number, said method further comprising the steps of: (1) applying the even numbered time slots to the port circuits comprising said first half when providing said second type of service and (2) applying the odd numbered time slots to circuitry associated with the port circuits comprising said second half.

Claim 21

Dependent Claim 36 words

The method of claim 17 wherein said method further comprises the steps of translating the odd numbered time slots into even numbered time slots and then applying them to the port circuits comprising said second half.

Claim 22

Dependent Claim 34 words

The method of claim 16 in combination with the steps of connecting each of the port circuits of said first group to a pair of station devices when providing said first type of service.

Claim 23

Dependent Claim 33 words

The method of claim 19 wherein one of said station devices of each pair comprises a data terminal while the other of said station devices of each pair comprises a telephone station set.

Claim 24

Independent Claim 235 words

A method of operating a PCM switching system for controllably establishing communication connections between selected ones of a plurality of port circuits, said system including means for generating a plurality of unique time slots in a series of cyclically recurring time slots, said method including the steps of: (1) mounting N port circuits on each of a plurality of port boards, (2) mounting M port boards on each of a first and a second and a third carrier, (3) applying N pairs of said time slots to each port board of said first carrier over separate conductor paths for each half of said first carrier, wherein each port circuit on said boards of said first carrier receives a different unique pair of said time slots to provide a first type of communication connection service, and (4) providing a second type of communication connection service by applying a first time slot of a different pair of said time slots to each of the N port circuits of each board on a first half of said second and third carriers via separate conductor paths for said first half of each of said second and third carriers and by applying the second time slot of each of said last named pairs to a different one of the N port circuits on each board of a second half of said second and third carriers via said separate conductor paths.

Claim 25

Independent Claim 235 words

A method of operating a PCM switching system for controllably establishing communication connections between selected ones of a plurality of port circuits, said system including means for generating a plurality of unique time slots in a series of cyclically recurring time slots, said method including the steps of: (1) mounting N port circuits on each of a plurality of port boards, (2) mounting M port boards on each of a first and a second and a third carrier, (3) applying N pairs of said time slots to each port board of said first carrier over separate conductor paths for each half of said first carrier, wherein each port circuit on said boards of said first carrier receives a different unique pair of said time slots to provide a first type of communication connection service, and (4) providing a second type of communication connection service by applying a first time slot of a different pair of said time slots to each of the N port circuits of each board on a first half of said second and third carriers via separate conductor paths for said first half of each of said second and third carriers and by applying the second time slot of each of said last named pairs to a different one of the N port circuits on each board of a second half of said second and third carriers via said separate conductor paths.

Claim 26

Dependent Claim 76 words

The method of claim 21 wherein the time slots of each pair are assigned an odd and even time slot number, said method further comprising the steps of: (1) applying the even numbered time slots to the port circuits comprising said first half when providing said second type of service, and (2) applying the odd numered time slots to circuitry associated with the port circuits comprising said second half when providing said second type of service.

Claim 27

Dependent Claim 36 words

The method of claim 22 wherein said method further comprises the steps of translating the odd numbered time slots into even numbered time slots and then applying them to the port circuits comprising said second half.

Claim 28

Dependent Claim 34 words

The method of claim 21 in combination with the steps of connecting each of the port circuits on said first carrier to a pair of station devices when providing said first type of service.

Claim 29

Dependent Claim 26 words

The method of claim 24 wherein one of said station devices comprises a data terminal while the other of said devices comprises a telephone station set.

Claim 30

Dependent Claim 87 words

The method of claim 21 wherein said step for providing said first type of service comprises the steps of: (1) applying a first control potential to port data interface boards on each half of said first carrier, and (2) operating said port data interface boards upon the receipt of said first control potential for applying the received M×N time slots received over the conductor path for each half to the port circuits of each half wherein each port circuit on said first carrier receives two time slots.

Claim 31

Dependent Claim 116 words

The system of claim 26 wherein said step for providing said second type of service comprises the steps of: (1) applying a second control potential to a port data interface board on said first half of each of said second and third carriers, and (2) operating said port data interface boards in said second and third carriers upon the receipt of said second control potential for applying the M×N time slots received over the conductor path for said first half of each of said second and third carriers to the M×N port circuits on both halves of said second and third carriers wherein each port circuit on said last named carriers receives a single time slot.

Claim 32

Dependent Claim 84 words

The method of claim 21 wherein said step for providing said first type of service comprises the steps of: (1) extending a separate I/O cable to said first carrier, (2) applying I/O signals over said cable containing M×N different addresses each of which is unique to a different port circuit on said first carrier, and (3) extending each received I/O signal via a port control interface board on said first carrier to the port circuit specified by an address portion of said I/O signals.

Claim 33

Dependent Claim 149 words

The method of claim 21 wherein said step for providing said second type of service comprises the steps of: (1) extending a separate I/O cable to said second carrier, (2) applying I/O signals over said last named cable containing M×N×2 addresses each of which is unique to a different port circuit on said second and third carriers, (3) connecting an I/O extension cable from said second to said third carrier for applying said received I/O signals to said third carrier, (4) operating a port control interface board in each of said second and third carriers for applying the received I/O signals containing even numbered port circuit addresses to an addressed port circuit on said first half of said second and third carriers, and (5) applying received I/O signals containing odd numbered port circuit addresses to an addressed port circuit on said second half of said second and third carriers.

Claim 34

Independent Claim 193 words

A method of operating a PCM switching system for controllably establishing communication connections between selected ones of a plurality of port circuits, said establishing means including means for generating a plurality of unique time slots in a series of cyclically recurring time slots, said method including the steps of: (1) mounting N port circuits on each of a plurality of port boards, (2) mounting M boards on each of a first and a second carrier, (3) applying N pairs of said time slots to each board of said first and second carriers wherein each port circuit on said boards receives a unique pair of said time slots to provide a first type of communication connection service, and (4) alternatively providing a second type of communication connection service by applying a first time slot of a different pair of said time slots to each of the N port circuits of each board on a first half of said first and second carriers and applying the second time slot of each of said last named pairs to a different one of the N port circuits on each board of a second half of said carriers.

Claim 35

Independent Claim 193 words

A method of operating a PCM switching system for controllably establishing communication connections between selected ones of a plurality of port circuits, said establishing means including means for generating a plurality of unique time slots in a series of cyclically recurring time slots, said method including the steps of: (1) mounting N port circuits on each of a plurality of port boards, (2) mounting M boards on each of a first and a second carrier, (3) applying N pairs of said time slots to each board of said first and second carriers wherein each port circuit on said boards receives a unique pair of said time slots to provide a first type of communication connection service, and (4) alternatively providing a second type of communication connection service by applying a first time slot of a different pair of said time slots to each of the N port circuits of each board on a first half of said first and second carriers and applying the second time slot of each of said last named pairs to a different one of the N port circuits on each board of a second half of said carriers.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1988-04-08	1988-10-08	1989-04-09	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1992-04-08	1992-10-08	1993-04-09	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1996-04-08	1996-10-08	1997-04-09	$7700.00	Window Closed / Lapsed

Time slot assignment facilities

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