US3341661A - Equipment for operator served calls at an intermediate switching center - Google Patents

Equipment for operator served calls at an intermediate switching center Download PDF

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Publication number
US3341661A
US3341661A US318275A US31827563A US3341661A US 3341661 A US3341661 A US 3341661A US 318275 A US318275 A US 318275A US 31827563 A US31827563 A US 31827563A US 3341661 A US3341661 A US 3341661A
Authority
US
United States
Prior art keywords
equipment
switching center
intermediate switching
circuits
calls
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US318275A
Inventor
Robert B Curtis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AT&T Corp
Original Assignee
Bell Telephone Laboratories Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bell Telephone Laboratories Inc filed Critical Bell Telephone Laboratories Inc
Priority to US318275A priority Critical patent/US3341661A/en
Application granted granted Critical
Publication of US3341661A publication Critical patent/US3341661A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0004—Selecting arrangements using crossbar selectors in the switching stages

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Claims (1)

1. IN A TELEPHONE SWITCHING SYSTEM, TRUNK CIRCUITS, A FIRST AND A SECOND GROUP OF OTHER CIRCUITS, MEANS RESPONSIVE TO THE RECEIPT OF A CALL BY ONE OF SAID DRUNK CIRCUITS FOR INTERCONNECTING IT WITH ONE CIRCUITS IN EACH OF SAID GROUPS A DATA TRANSFER CIRCUIT, FURTHER MEANS RESPONSIVE TO THE RECEIPT OF SAID CALL FOR CAUSING SAID ONE TRUNK CIRCUIT TO EFFECT THE TRANSMISSION OF A SERVICE REQUEST SIGNAL TO SAID DATA TRANSFER CIRCUIT, AND MEANS RESPONSIVE TO
US318275A 1963-10-23 1963-10-23 Equipment for operator served calls at an intermediate switching center Expired - Lifetime US3341661A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US318275A US3341661A (en) 1963-10-23 1963-10-23 Equipment for operator served calls at an intermediate switching center

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US318275A US3341661A (en) 1963-10-23 1963-10-23 Equipment for operator served calls at an intermediate switching center

Publications (1)

Publication Number Publication Date
US3341661A true US3341661A (en) 1967-09-12

Family

ID=23237456

Family Applications (1)

Application Number Title Priority Date Filing Date
US318275A Expired - Lifetime US3341661A (en) 1963-10-23 1963-10-23 Equipment for operator served calls at an intermediate switching center

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US (1) US3341661A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3777058A (en) * 1972-07-27 1973-12-04 Bell Telephone Labor Inc Operator positions having both dedicated and shared loop facilities
US3835466A (en) * 1973-09-14 1974-09-10 Gte Automatic Electric Lab Inc Control of operator position display

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3133153A (en) * 1960-10-07 1964-05-12 Automatic Elect Lab Special service toll telephone system
US3176081A (en) * 1960-04-18 1965-03-30 Itt Cordless switchboard
US3218392A (en) * 1961-10-10 1965-11-16 North Electric Co Signalling system for use with toll ticketing equipment
US3248486A (en) * 1962-12-10 1966-04-26 Bell Telephone Labor Inc Line switching equipment for switchboards

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3176081A (en) * 1960-04-18 1965-03-30 Itt Cordless switchboard
US3133153A (en) * 1960-10-07 1964-05-12 Automatic Elect Lab Special service toll telephone system
US3218392A (en) * 1961-10-10 1965-11-16 North Electric Co Signalling system for use with toll ticketing equipment
US3248486A (en) * 1962-12-10 1966-04-26 Bell Telephone Labor Inc Line switching equipment for switchboards

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3777058A (en) * 1972-07-27 1973-12-04 Bell Telephone Labor Inc Operator positions having both dedicated and shared loop facilities
US3835466A (en) * 1973-09-14 1974-09-10 Gte Automatic Electric Lab Inc Control of operator position display

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