Transmission apparatus capable of transmitting high speed modem signal
First Claim
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1. A transmission apparatus comprising:
- specified signal detecting means for detecting a specified signal according to one of V.8 protocol and V.8bis protocol from an input signal consisting of one of a speech signal and a voice band data signal; and
transmitting means for transmitting the input signal to opposite side equipment as a transmission signal via a transmission line such that the transmission signal has different quality depending on whether said specified signal detecting means detects the specified signal or not.
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Abstract
A transmission apparatus is capable of transmitting a high-speed modem signal. It has at least two types of transmission schemes: one uses a clear channel that can transmit a high-speed modem signal; and the other is a conventional 32-kbit/s or 40-kbit/s ADPCM scheme implemented by a coding section 25. When an ANSam signal detector detects an ANSam signal according to the V.8 protocol from an input signal, a transmission assignment processor instructs a BC (bear channel) bit assignment section to switch the transmission scheme to the higher quality transmission scheme using the clear channel.
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25 Claims
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1. A transmission apparatus comprising:
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specified signal detecting means for detecting a specified signal according to one of V.8 protocol and V.8bis protocol from an input signal consisting of one of a speech signal and a voice band data signal; and
transmitting means for transmitting the input signal to opposite side equipment as a transmission signal via a transmission line such that the transmission signal has different quality depending on whether said specified signal detecting means detects the specified signal or not. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification