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.)
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.)
CENTRAL TELEPHONE
Original Assignee
CENTRAL TELEPHONE
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 CENTRAL TELEPHONEfiledCriticalCENTRAL TELEPHONE
Publication of DE2056338A1publicationCriticalpatent/DE2056338A1/de
H04M1/00—Substation equipment, e.g. for use by subscribers
H04M1/64—Automatic arrangements for answering calls; Automatic arrangements for recording messages for absent subscribers; Arrangements for recording conversations
H04M1/65—Recording arrangements for recording a message from the calling party
H04M1/654—Telephone line monitoring circuits therefor, e.g. ring detectors
Landscapes
Engineering & Computer Science
(AREA)
Signal Processing
(AREA)
Telephonic Communication Services
(AREA)
DE197020563381970-04-291970-11-17Telefonverbindungsvorrichtung für Netzanrufleitungen
PendingDE2056338A1
(de)