NO930785L - ALARM AND TEST SYSTEM FOR A DIGITAL HEADLINE - Google Patents

ALARM AND TEST SYSTEM FOR A DIGITAL HEADLINE

Info

Publication number
NO930785L
NO930785L NO93930785A NO930785A NO930785L NO 930785 L NO930785 L NO 930785L NO 93930785 A NO93930785 A NO 93930785A NO 930785 A NO930785 A NO 930785A NO 930785 L NO930785 L NO 930785L
Authority
NO
Norway
Prior art keywords
twisted pair
signal
symbols
converts
remote terminal
Prior art date
Application number
NO93930785A
Other languages
Norwegian (no)
Other versions
NO930785D0 (en
Inventor
David C Bliven
Anthony Vranicar
Philip B Vail
Gerald L Shimirak
Julian S Mullaney
Jan J Erreygers
Original Assignee
Raychem Corp
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
Priority claimed from US07/584,325 external-priority patent/US5111497A/en
Priority claimed from PCT/US1991/005475 external-priority patent/WO1992004794A2/en
Application filed by Raychem Corp filed Critical Raychem Corp
Publication of NO930785D0 publication Critical patent/NO930785D0/en
Publication of NO930785L publication Critical patent/NO930785L/en

Links

Abstract

Et prøvesystem er knyttet til utstyr for sending og mottagning av flere telefonisk overførte signaler over et enkelt snodd par (100). Systemet omformer et analogt signal fra en lokal telefonsentral (112) til et 80 ksymboler/sek.signal for overføring over et snodd par med et linjekort (104). En fjerntliggende terminal (102) omformer 80 ksymboler/sek.signaler tilbake til et vanlig analogt signal til bruk i vanlig telefon (108), faksimile eller annet beslektet utstyr. Prøveutstyret prøver hver for seg hele systemet, linjekort-delen av systemet, den fjerntliggende termlnaldel av systemet og det snodde par. En forbedret 2-til-4-leder hybrid koblingskrets (202) er også beskrevet. Den forbedrede krets har to ekstra "side"-vikllnger knyttet til den kjente utgangstransformator der de tilføyde viklinger forbedrer signalstyrken på det mottatte signal såvel som på en effektiv måte utligner tilbakekobling fra utgangsforsterkeren.A test system is associated with equipment for transmitting and receiving multiple telephonically transmitted signals over a single twisted pair (100). The system converts an analog signal from a local telephone exchange (112) to an 80 k symbols / sec signal for transmission over a twisted pair with a line card (104). A remote terminal (102) converts 80 x symbols / sec signals back to a conventional analog signal for use in a regular telephone (108), facsimile or other related equipment. The test equipment separately tests the entire system, the line card portion of the system, the remote terminal portion of the system and the twisted pair. An improved 2-to-4-conductor hybrid coupling circuit (202) is also disclosed. The improved circuit has two additional "side" windings associated with the known output transformer where the added windings improve the signal strength of the received signal as well as effectively equalize feedback from the output amplifier.

NO93930785A 1990-09-04 1993-03-03 ALARM AND TEST SYSTEM FOR A DIGITAL HEADLINE NO930785L (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US57900690A 1990-09-04 1990-09-04
US07/584,325 US5111497A (en) 1990-09-17 1990-09-17 Alarm and test system for a digital added main line
PCT/US1991/005475 WO1992004794A2 (en) 1990-09-04 1991-08-01 Alarm and test system for a digital main line

Publications (2)

Publication Number Publication Date
NO930785D0 NO930785D0 (en) 1993-03-03
NO930785L true NO930785L (en) 1993-04-27

Family

ID=27376783

Family Applications (1)

Application Number Title Priority Date Filing Date
NO93930785A NO930785L (en) 1990-09-04 1993-03-03 ALARM AND TEST SYSTEM FOR A DIGITAL HEADLINE

Country Status (1)

Country Link
NO (1) NO930785L (en)

Also Published As

Publication number Publication date
NO930785D0 (en) 1993-03-03

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