ISDN communication control unit and control method

Details ISDN communication control unit and control method ISDN communication control unit and control method

1991-02-21

1993-11-30

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

3701101, 379 94, 379 96, H04Q 1104

Patent

active

052672450

ABSTRACT:
A communication control unit for integrated service digital network (ISDN) is disclosed. The ISDN communication control unit includes a data communication adapter for transmitting and receiving data to and from the ISDN and a voice adapter for transmitting and receiving voice data received from the ISDN, through the data communication adapter. The voice adapter includes a memory for storing voice data, a compression and expansion circuit for voice data, a temporary storage circuit for voice data, a monitor unit for voice data, a communication path change-over circuit for changing over a communication path between said temporary storage circuit, said monitor circuit and the ISDN, and a control unit for controlling these. A communication path is changed over by the communication path change-over circuit, to mutually transmit and receive voice data between the temporary storage circuit, the monitor circuit and the ISDN.

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patent: 4965795 (1990-10-01), Coffelt et al.
patent: 4995073 (1991-02-01), Okata et al.
patent: 4996685 (1991-02-01), Farese et al.
patent: 5042028 (1991-08-01), Ogawa
patent: 5051992 (1991-09-01), Taniguchi et al.

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