US3410960A - No-test or busy verification in a private branch exchange telephone system - Google Patents

No-test or busy verification in a private branch exchange telephone system Download PDF

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Publication number
US3410960A
US3410960A US438182A US43818265A US3410960A US 3410960 A US3410960 A US 3410960A US 438182 A US438182 A US 438182A US 43818265 A US43818265 A US 43818265A US 3410960 A US3410960 A US 3410960A
Authority
US
United States
Prior art keywords
test
telephone system
branch exchange
private branch
exchange telephone
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
US438182A
Inventor
Edson L Erwin
Alexander E Gerbore
Gerald C Hobbs
Henry J Walsh
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 US438182A priority Critical patent/US3410960A/en
Application granted granted Critical
Publication of US3410960A publication Critical patent/US3410960A/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
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • H04Q3/54—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker in which the logic circuitry controlling the exchange is centralised

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

Description

Nov. 12, 1968 wm ET AL 3410,960
No-TEsT 0R BUSY VERIFICATION IN A PRIVATE BRANCH EXCHANGE TELEPHONE SYSTEM Filed March 9, 1965 109 Sheets-Sheet 1 U) 5 .Q T a 0- E -E E u CD Q 03 x i Lu Lu 2 2 E Z 2 3 3 T 3 E g k E J 5 E B E 3 $252-$351: INVENTORS dd HJWALSH (a- WMMQXT ATTOQ/VEY Nov. 12, 1968 E. L. ERWIN ET AL 3410,960
NO-TEST OR BUSY VERIFICATION IN A PRIVATE BRANCH EXCHANGE TELEPHONE SYSTEM Filed March 9, 1965 109 Sheets-Sheet 2'3 Nov. 12, 1968 E. 1.. E RWIN ET L NO-TEST OR BUSY VERIFICATION IN A PRIVATE BRANCH EXCHANGE TELEPHONE SYSTEM 109 Sheets-Sheet 4 Fi led March 9, 1965 gmimmq v mw ENTSEN 33$? g m JEN 9% -35 Nov. 12, 1968 E. L. ERWIN ET AL NO-TEST on BUSY VERIFICATION IN A PRIVATE BRANCH EXCHANGE TELEPHONE SYSTEM Filed March 9, 1965 109 Sheets- Sheet 6 flaw 2 P w :2: O. mDm @vvlm gm 653E; I 652: C v 58 .v v NI |1 E azag mg @535 @w w mm nn 1 m am g A In m m mwcmfim IQ It m u a m -J T P 0 v 84 m l m EGEE E 05 8: 9 1 N ME- 6Q 89% 8259mm ,E m 8Q Aevqzs v mom owwo .Ew 29.2.5 MES w OH Nov. 12, 1968 wm ET AL NO-TEST OR BUSY VERIFICATION IN A PRIVATE BRANCH EXCHANGE TELEPHONE SYSTEM 109 Sheets-Sheet 10 Filed March 9, 1965 E. L. ERWIN ET AL NO-TEST OR BUSY BRANCH EXCHANGE TELEPHONE SYSTEM 109 Sheets-Sheet 11 csTmuzom 04ml:
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2 :E buxom ccTmuIom 2 cTmuIom 32 Filed March 9, 1965 109 Sheets-Sheet 1' Hill! IIHII Hllll E. L. ERWIN ETAL NO-TEST OR BUSY VERIFICATION IN A PRIVATE BRANCH EXCHANGE TELEPHONE SYSTEM HHH E... 2... 2 8 E HHH 2 E z MMM I826 859 B I226 818.. fimmmmm :2: :2: E5 E5 1.... :2: 1.... :I: m .2... .2... 2.... :z: :z: E5 55 E IHH 2% E 2% E E WMW 2 10.226 QQIQQ 0 Hum 19:26 o0Iow Hllll l lllll Nov. 12, 1968 Filed March 9, 1965 Nov. 12, 1968 2.1.. ERWIN ET AL NO-TEST OR BUSY VERIFICATION IN A PRIVATE BRANCH EXCHANGE TELEPHONE SYSTEM 109 Sheets-Sheet 15 Filed March 9, 1965 3w... S S 9 S w W M M W W 9 W U 9 aavia. x 52 2.20. 2.2-9.2 52 922 56 23. 5.0 9.2.. P b b T T 5.2-282 1 55-85 5.2-85 225-8%. 1 822 8%. 55 8%. 5.28228. 1 152-0822. 1 526822 i 52-8228. 3.2-2.822. 2.2-2.822. 52-8222. 1 6.2-0822. 1 62-0823. 1 T 8.3828. 5.382%. 5.1.822. 5..-8 m.22 r 5.5822. 1 1 52 8022. 1 2 2 6E 52-3228. 8.2-2.223. 525822.
Nov. 12, 1968 E. 1.. ERWIN ETAL NO-TEST OR BUSY VERIFICATION IN A PRIVATE BRANCH EXCHANGE TELEPHONE SYSTEM I Filed March 9, 1965 109 Sheets-Sheet 14 2% 8m mo 5o; bu (.23: 222: 82: E 75E 8 "6 m2: 8 m2: 8 8 J J w w g m g m 5%; E E E E E P E E 8 Q E 8 i Q .t S E (lllll llllll Illlll QSTQQION Illlll llllll IIIIII IlIII'I llllll illlll illlll Illlll qwcmTourom Nov. 12, 1968 E. L. ERWIN ET AL 3410,960
NO-TEST OR BUSY VERIFICATION IN A PRIVATE BRANCH EXCHANGE TELEPHONE SYSTEM 109 Sheets-Sheet 15 Filed March 9, 1965 HE E Q .i Q E FL 3 6E mmm BK @035.
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Nov. 12, 1968 E. 1.. ERWIN ET AL NO-TEST OR BUSY VERIFICATION IN A PRIVATE BRANCH EXCHANGE TELEPHONE SYSTEM 109 Sheets-Sheet 20 Filed March 9, 1965 @5318 r 6822018 I I m E,
m 8m 0 8o 0 813 m s3$= I I 23 3%: sssmzz @QQQION r f 1 81% i I I T amigo? 85 1512 581 301: 3013 lulm A d D @6813 85-8169 86-8769 I ssimwlfi 6898018 s omom v I 699818 I 5%-8r8 U asmiuzom 19am H H H H w w w w w fi mmQE Quiz/E 0% mm OE mmxmiz oh (I mmOE $21 32 0h
US438182A 1965-03-09 1965-03-09 No-test or busy verification in a private branch exchange telephone system Expired - Lifetime US3410960A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US438182A US3410960A (en) 1965-03-09 1965-03-09 No-test or busy verification in a private branch exchange telephone system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US438182A US3410960A (en) 1965-03-09 1965-03-09 No-test or busy verification in a private branch exchange telephone system

Publications (1)

Publication Number Publication Date
US3410960A true US3410960A (en) 1968-11-12

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US438182A Expired - Lifetime US3410960A (en) 1965-03-09 1965-03-09 No-test or busy verification in a private branch exchange telephone system

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3917910A (en) * 1974-10-03 1975-11-04 Bell Telephone Labor Inc Circuitry for providing call override in a PBX system in accordance with a supplied class of service

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2874225A (en) * 1954-05-14 1959-02-17 Itt Busy-verification automatic telephone system
DE1166286B (en) * 1962-06-29 1964-03-26 Siemens Ag Circuit arrangement for listening-in and listening-in for an operator on four-wire / four-wire through connections
US3327065A (en) * 1964-04-28 1967-06-20 Western Electric Co Busy verification circuit for private branch exchanges

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2874225A (en) * 1954-05-14 1959-02-17 Itt Busy-verification automatic telephone system
DE1166286B (en) * 1962-06-29 1964-03-26 Siemens Ag Circuit arrangement for listening-in and listening-in for an operator on four-wire / four-wire through connections
US3327065A (en) * 1964-04-28 1967-06-20 Western Electric Co Busy verification circuit for private branch exchanges

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3917910A (en) * 1974-10-03 1975-11-04 Bell Telephone Labor Inc Circuitry for providing call override in a PBX system in accordance with a supplied class of service

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