Telephonic communications – Repeater – With gain or attenuation control
Reexamination Certificate
2005-12-20
2005-12-20
Tran, Sinh (Department: 2646)
Telephonic communications
Repeater
With gain or attenuation control
C379S093010, C379S221070, C379S399010
Reexamination Certificate
active
06978007
ABSTRACT:
The communications system has a transmission network for transmitting useful data and control data. Call numbers are input at a subscriber terminal. A subscriber line unit with an adjustable transmission characteristic is connected between the subscriber terminal and the transmission network. A recognition unit connected to the transmission network recognizes particular call number patterns and outputs particular control signals corresponding to call number patterns. A control unit connected between the recognition unit and the subscriber line unit sets the transmission characteristic of the subscriber line unit depending on the control signals provided by the recognition unit.
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Caldera Peter
Höfer Gerald
Kunisch Paul
Greenberg Laurence A.
Locher Ralph E.
Siemens Aktiengesellschaft
Stemer Werner H.
Swerdlow Daniel
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