Apparatus and method for conveying TTY signals over wireless telecommunication systems
First Claim
1. A teletype signal processor for teletype signals comprising one or more teletype information bits and one or more teletype start or stop bits over a wireless telecommunication system, the teletype signal processor comprising:
- a transmitter configured to derive the teletype information bits from the teletype signals, represent the derived teletype information bits as at least one message in accordance with a format, and transmit said at least one message over the wireless telecommunication system or transmit said at least one message and the teletype signals over the wireless telecommunication system; and
a receiver configured to receive signals from the wireless telecommunication system, determine whether such received signals are teletype signals carrying teletype information in accordance with the format, and decode the teletype information from part of the received signals determined as not having been adversely affected by the wireless telecommunication system.
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Accused Products
Abstract
An apparatus and method for conveying teletype signals over a wireless telecommunication system. When the apparatus receives a teletype signal, it derives information carried by said signal and represents said information as at least one message. The at least one message and/or the teletype signal is transmitted over the wireless telecommunication system. When the apparatus receives a signal from the wireless telecommunication system that it determines to be a teletype signal, the apparatus of the present invention decodes the teletype information from part of the received signal determined as not having been adversely affected by the telecommunication system.
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Citations
8 Claims
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1. A teletype signal processor for teletype signals comprising one or more teletype information bits and one or more teletype start or stop bits over a wireless telecommunication system, the teletype signal processor comprising:
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a transmitter configured to derive the teletype information bits from the teletype signals, represent the derived teletype information bits as at least one message in accordance with a format, and transmit said at least one message over the wireless telecommunication system or transmit said at least one message and the teletype signals over the wireless telecommunication system; and
a receiver configured to receive signals from the wireless telecommunication system, determine whether such received signals are teletype signals carrying teletype information in accordance with the format, and decode the teletype information from part of the received signals determined as not having been adversely affected by the wireless telecommunication system. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for conveying teletype signals comprising one or more teletype information bits and one or more teletype start or stop bits over a wireless telecommunication system, the method comprising the steps of:
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receiving a first signal;
deriving one or more teletype information bits from the received first signal, representing said one or more teletype information bits as at least one message in accordance with a format, and transmitting said at least one message with or without the received first signal over the wireless telecommunication system when it is determined that the received first signal is a teletype signal; and
receiving a second signal from the wireless telecommunication system, decoding teletype information from part of the received second signal determined as not having been adversely affected by the wireless telecommunication system when it has been determined that the received second signal comprises either at least one message representing teletype information or a teletype signal along with at least one message representing teletype information.
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Specification