发明名称 |
TELEPHONE SIGNAL TRANSMISSION DEVICE |
摘要 |
<p>A telephone signal transmission device capable of transmitting and receiving dial pulses in a network system which includes a telephone exchange is disclosed. Transitions of a connection signal are detected to allow a connection signal to be transmitted only when the transmission of a speech signal is needless. The connection signal is standardized one bit per frame and added to a transmission signal. The device effectively utilizes substantially all of the transmission bits for speech.</p> |
申请公布号 |
CA1273134(A) |
申请公布日期 |
1990.08.21 |
申请号 |
CA19860513563 |
申请日期 |
1986.07.11 |
申请人 |
NEC CORPORATION |
发明人 |
YASUNAGA, SATOSHI |
分类号 |
H04M3/00;H04J3/12;H04J3/16;H04M1/253;H04M7/00;H04M11/06;(IPC1-7):H04M7/00 |
主分类号 |
H04M3/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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