Multiplex communications – Special services – Conferencing
Reexamination Certificate
2006-12-26
2006-12-26
Lee, Andrew C. (Department: 2616)
Multiplex communications
Special services
Conferencing
C370S359000
Reexamination Certificate
active
07154865
ABSTRACT:
An application module interface is disclosed that allows one or more modules to access voice or data channels in a private branch exchange environment that contains one or mole B channels (bearer channels) for transmitting voice or data signals, and one or more D channels (signaling channel) for transmitting data. The application module interface provides a control channel that allows a module to obtain and vary the status and configuration of a telephone terminal. The application module interface provides access to both directions of two B channels (B1and B2) and one D channel. The application module interface is the only interface required to connect the two B channels (B1and B2) and one D channel to or from the telephone terminal and the add-on module. A frame format includes a start bit (logic “1”), a number of data bits allocated to the D channels (D, D′) and B channels (B1,B1′,B2,B2′), and eight stop bits (logic “0”). A tip/ring, module allows an analog device, such as a facsimile machine or modem, to access the digital voice and data channels associated with the private branch exchange switch. An RS-232 or a Universal Serial Bus module allows a personal computer or other enabled device to interact with and control the operation of a telephone terminal for computer telephony integration applications.
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Fulcomer Emanuel James
Haislett David W.
Avaya Technology Corp.
Lee Andrew C.
Ryan & Mason & Lewis, LLP
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