Telephone line or system combined with diverse electrical system or signalling (e.g., composite) > Having transmission of a digital message signal over a telephone line > Switching between different terminal types (e.g., voice/data switch) > Patents

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Class Information
Number: 379/93.09
Name: Telephonic communications > Telephone line or system combined with diverse electrical system or signalling (e.g., composite) > Having transmission of a digital message signal over a telephone line > Switching between different terminal types (e.g., voice/data switch)
Description: Subject matter including an arrangement for selecting between diverse communication modes.

Sub-classes under this class:

Class Number	Class Name	Patents
379/93.11	Among at least three terminal types	75

Patents under this class:

1 2 3 4 5 6 7 8 9

Patent Number	Title Of Patent	Date Issued
4184053	Ringing signal detector	Jan. 15, 1980
4009342	Circuit arrangement for communication facilities wherein transmission paths can be employed for different types of message switching	Feb. 22, 1977