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Browse Prior Art Database

Switch Box for Voice Data Communication

IP.com Disclosure Number: IPCOM000075656D
Original Publication Date: 1971-Oct-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 39K

Publishing Venue

IBM

Related People

Witt, KD: AUTHOR

Abstract

It is preferable to provide transfer points T1 through T4 from voice-to-data and vice versa between connections M' and P' of a table positioned or wall mounted telephone set and the respective handset (microphone and telephone connections M and P), rather than between the telephone line and the telephone set entry. RD are the receive data connections to, and SD are the send data connections from the coupled terminal data set.

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Switch Box for Voice Data Communication

It is preferable to provide transfer points T1 through T4 from voice-to-data and vice versa between connections M' and P' of a table positioned or wall mounted telephone set and the respective handset (microphone and telephone connections M and P), rather than between the telephone line and the telephone set entry. RD are the receive data connections to, and SD are the send data connections from the coupled terminal data set.

Thus, the conventional hybrid circuit included in the telephone set is applicable for voice and data. The dial keys of a modern telephone set are applicable for dialing and also for data input.

If desired, microphone connections M' are transferred separately to SD (in order to avoid environment noise input), while keeping telephone connections P' in parallel to handset earphone connections p, and to receive data connections RD for monitoring incoming signals.

Adjustable amplifier V and/or loudspeaker L are provided to free the operator's hands after having established a connection by manual dialing and having proved by listening, communication with the remote location. For this version, with additional loudspeaker L, handset telephone connections P may be cut off by transfer points T3 and T4, also. Matching input impedance XP of amplifier V now replaces the removed telephone impedance of the handset. Likewise, output impedance XM of attenuator circuit A or of the data set exit itself, replaces the cut-...