Test apparatus for digital speech interpolator for use in time d

Details Test apparatus for digital speech interpolator for use in time d Test apparatus for digital speech interpolator for use in time d

1984-06-25

1986-08-26

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

371 25, H04J 116, H04J 314, G01R 3128, G06F 1100

Patent

active

046086838

ABSTRACT:
An apparatus for testing the operation of a digital speech interpolator provided in a transmitting station and a receiving station in a time division multiple access scheme (DSI/TDMA). The apparatus comprises a transmitting unit and a receiving unit. In the transmitting unit at the transmitting station, a pseudo random code for each one of a plurality of channels is generated, a channel identifying signal is generated, a fixed signal having a level lower than a detectable level of a tone detector of the digital speech interpolator (DSI) at the transmitting station is generated, and a pseudo tone burst signal for each channel is generated. The pseudo random code, the channel identifying signal and the fixed signal are used under the control of the pseudo tone burst signal, for generating a time division multiplex signal. The time division multiplex signal is supplied to the DSI at the transmitting station. In the receiving unit at the receiving station, the signal sent from the DSI on the transmitting station is received for detecting the pseudo random code, the channel identifying signal and the fixed signal.

REFERENCES:
patent: 4002841 (1977-01-01), Chino et al.
patent: 4138599 (1979-02-01), Munter
patent: 4139147 (1979-02-01), Franke
patent: 4377822 (1983-03-01), Noirel et al.
patent: 4503536 (1985-03-01), Panzer
patent: 4525789 (1985-06-01), Kemper et al.

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