[go: up one dir, main page]

IT1206621B - Continuity tester for telecommunications - has seven special switches associated with each major component and linked with test unit operative for short time interval - Google Patents

Continuity tester for telecommunications - has seven special switches associated with each major component and linked with test unit operative for short time interval

Info

Publication number
IT1206621B
IT1206621B IT2605578A IT2605578A IT1206621B IT 1206621 B IT1206621 B IT 1206621B IT 2605578 A IT2605578 A IT 2605578A IT 2605578 A IT2605578 A IT 2605578A IT 1206621 B IT1206621 B IT 1206621B
Authority
IT
Italy
Prior art keywords
linked
short time
telecommunications
time interval
test unit
Prior art date
Application number
IT2605578A
Other languages
Italian (it)
Other versions
IT7826055A0 (en
Original Assignee
Int Standard Electric 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
Application filed by Int Standard Electric Corp filed Critical Int Standard Electric Corp
Priority to IT2605578A priority Critical patent/IT1206621B/en
Publication of IT7826055A0 publication Critical patent/IT7826055A0/en
Application granted granted Critical
Publication of IT1206621B publication Critical patent/IT1206621B/en

Links

Landscapes

  • Monitoring And Testing Of Exchanges (AREA)

Abstract

The transmitter (S) and receiver (E) for speech frequency signals are connected through switches (AS, AE) to the time distribution multiplex-bus (ZS) and through this to a control circuit (Stz. The bus-line is also connected through to the telephone (two-wire) switch unit (AT). The continuity test is made by the use of additional lines from the control unit (Stz) to the switch units (tx, ty) and through a central unit (ZE) which only operates for a short time, and is linked to four line sensors (U1, U2, U3, U4). The first of these (U1) is associated with the digital-analogue converter (W2), the second (U2) is associated with a fork circuit (G). The third (U3) is linked with the calling subscriber (Tln) and is in the form of a weak relay. The fourth special switch (U4) is a fork with active elements.
IT2605578A 1978-07-25 1978-07-25 Continuity tester for telecommunications - has seven special switches associated with each major component and linked with test unit operative for short time interval IT1206621B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
IT2605578A IT1206621B (en) 1978-07-25 1978-07-25 Continuity tester for telecommunications - has seven special switches associated with each major component and linked with test unit operative for short time interval

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT2605578A IT1206621B (en) 1978-07-25 1978-07-25 Continuity tester for telecommunications - has seven special switches associated with each major component and linked with test unit operative for short time interval

Publications (2)

Publication Number Publication Date
IT7826055A0 IT7826055A0 (en) 1978-07-25
IT1206621B true IT1206621B (en) 1989-04-27

Family

ID=11218526

Family Applications (1)

Application Number Title Priority Date Filing Date
IT2605578A IT1206621B (en) 1978-07-25 1978-07-25 Continuity tester for telecommunications - has seven special switches associated with each major component and linked with test unit operative for short time interval

Country Status (1)

Country Link
IT (1) IT1206621B (en)

Also Published As

Publication number Publication date
IT7826055A0 (en) 1978-07-25

Similar Documents

Publication Publication Date Title
JPS5462711A (en) Processing system for answer of private branch exchange
IT1206621B (en) Continuity tester for telecommunications - has seven special switches associated with each major component and linked with test unit operative for short time interval
GB1085938A (en) Voice-frequency key dialling telephone system
JPS55138955A (en) Time sharing channel interruption system
JPS55121774A (en) Telephone communication system
JPS55105466A (en) Exchange system
JPS5469906A (en) Analog-to-digital converter circuit
JPS5781758A (en) Signal transmitting system of switchboard
JPS55149590A (en) Communication system of branch line
JPS57204670A (en) Call monitoring system
JPS5637759A (en) Connection system for digital telephone set
JPS5570142A (en) Automatic channel switching system for 2-channel radio communication
JPS5792990A (en) Electronic key telephone device
JPS5455306A (en) Multi-address communication system of time-division switchboard
JPS5486205A (en) Connection system for line concentrator
JPS5475207A (en) Ringer transmission control system
JPS54122009A (en) Two-wire/four-wire converter of time-division switchboard
JPS56156064A (en) Transmitting system of interruption sound
JPS5539426A (en) Emergency calling system for radio communication system
JPS57186853A (en) Radio circuit setting system
JPS57178464A (en) Calling system for branch telephone circuit
JPS57170664A (en) Howler signal transmitting system in time division switchboard
JPS57103457A (en) Interruption monitor system
JPS5552664A (en) Channel test system
JPS57127354A (en) Digital switchboard cord trunk circuit