Transfer of voice messages
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United States of America Patent
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-
Jan 21, 1997
Grant Date -
N/A
app pub date -
Dec 22, 1994
filing date -
Dec 22, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and a communication network including a public telephone network and a narrow band radio network for packet-switching of data between stationary and mobile terminals. Voice messages may be bi-directionally transferred between the public telephone network and the terminals by a gateway arranged to connect the public telephone network and the packet-switched narrow band radio data network. The voice messages are converted in the gateway or terminals into digital form and compressed, and then transferred to the packet-switched narrow band radio data network. The terminals and the gateway are provided with a device in which the compressed voice messages, transferred through the packet-switched network, are expanded and, after conversion to analog form, reproduced.
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