NL7808262A - DEVICE FOR ESTABLISHING A DC SWITCH CHARACTERISTIC IN A TELECOMMUNICATIONS SYSTEM. - Google Patents

DEVICE FOR ESTABLISHING A DC SWITCH CHARACTERISTIC IN A TELECOMMUNICATIONS SYSTEM.

Info

Publication number
NL7808262A
NL7808262A NL7808262A NL7808262A NL7808262A NL 7808262 A NL7808262 A NL 7808262A NL 7808262 A NL7808262 A NL 7808262A NL 7808262 A NL7808262 A NL 7808262A NL 7808262 A NL7808262 A NL 7808262A
Authority
NL
Netherlands
Prior art keywords
establishing
telecommunications system
switch characteristic
characteristic
switch
Prior art date
Application number
NL7808262A
Other languages
Dutch (nl)
Original Assignee
Siemens Ag Albis
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 Siemens Ag Albis filed Critical Siemens Ag Albis
Publication of NL7808262A publication Critical patent/NL7808262A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/2272—Subscriber line supervision circuits, e.g. call detection circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/38—Signalling arrangements; Manipulation of signalling currents using combinations of direct currents of different amplitudes or polarities over line conductors or combination of line conductors

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
NL7808262A 1977-08-24 1978-08-07 DEVICE FOR ESTABLISHING A DC SWITCH CHARACTERISTIC IN A TELECOMMUNICATIONS SYSTEM. NL7808262A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1035277A CH618306A5 (en) 1977-08-24 1977-08-24 Arrangement for identifying a DC switching signal in a telecommunications system

Publications (1)

Publication Number Publication Date
NL7808262A true NL7808262A (en) 1979-02-27

Family

ID=4362290

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7808262A NL7808262A (en) 1977-08-24 1978-08-07 DEVICE FOR ESTABLISHING A DC SWITCH CHARACTERISTIC IN A TELECOMMUNICATIONS SYSTEM.

Country Status (3)

Country Link
CH (1) CH618306A5 (en)
IL (1) IL55411A (en)
NL (1) NL7808262A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2458963A1 (en) * 1979-06-06 1981-01-02 Philips Nv CURRENT DETECTION DEVICE FOR AN AUTOMATIC TELEPHONE CENTRAL

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2458963A1 (en) * 1979-06-06 1981-01-02 Philips Nv CURRENT DETECTION DEVICE FOR AN AUTOMATIC TELEPHONE CENTRAL

Also Published As

Publication number Publication date
IL55411A (en) 1981-01-30
IL55411A0 (en) 1978-10-31
CH618306A5 (en) 1980-07-15

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Legal Events

Date Code Title Description
BB A search report has been drawn up
A85 Still pending on 85-01-01
BV The patent application has lapsed