SE174708C1 - - Google Patents

Info

Publication number
SE174708C1
SE174708C1 SE174708DA SE174708C1 SE 174708 C1 SE174708 C1 SE 174708C1 SE 174708D A SE174708D A SE 174708DA SE 174708 C1 SE174708 C1 SE 174708C1
Authority
SE
Sweden
Prior art keywords
receiver
signal
return signal
transmitter
return
Prior art date
Application number
Other languages
English (en)
Swedish (sv)
Publication date
Publication of SE174708C1 publication Critical patent/SE174708C1/sv

Links

Landscapes

  • Telephonic Communication Services (AREA)
SE174708D SE174708C1 (cs)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE174708T

Publications (1)

Publication Number Publication Date
SE174708C1 true SE174708C1 (cs) 1961-01-01

Family

ID=41963987

Family Applications (1)

Application Number Title Priority Date Filing Date
SE174708D SE174708C1 (cs)

Country Status (1)

Country Link
SE (1) SE174708C1 (cs)

Similar Documents

Publication Publication Date Title
DK142220B (da) Kobling til teleanlaeg i hvilke forbindelsesveje kan benyttes til forskellige arter af informationsoverfoering
US2909607A (en) Automatic telephone system with automatic transfer
US2481840A (en) Timer for switching from signaling device to the subscriber's ringer after selectable predetermined time
SE174708C1 (cs)
US2411091A (en) Selective signal receiving circuit
US2320885A (en) Signaling system
US3065305A (en) Connecting device for private automatic branch exchanges
US2319339A (en) Signaling system
US2574224A (en) Circuit for marking a line as busy
US2503000A (en) Carrier telegraphy
US2040691A (en) Selective code receiver
US1553317A (en) Telephone system
SE420555B (sv) Anordning for kontroll av till en abonnentapparat kommande telefonanrop
US2615987A (en) Calling line identification system
US2983780A (en) Circuit arrangement for interconnecting teleprinter subscriber-networks
US2576216A (en) Selective calling system
US2483732A (en) Signaling circuit
US2796460A (en) Switching circuit
US1023480A (en) Telephone-exchange system.
US3482054A (en) Office device for identifying number of malicious caller's telephone station
US2246952A (en) Signaling system
US2530943A (en) Intercommunicating telephone system
US3138668A (en) Circuit arrangement for signalling through telephone lines
US2938953A (en) Paystation adapter for telephone systems
US2850575A (en) Automatic telephone systems