发明名称 |
Voice, data or both over one telephone line in a T-1 carrier system |
摘要 |
A standard T-1 span is connected to a digital central office or remote terminal. Telephone equipment for such a T-1 span defines a superframe format with each frame of the twelve frames of a superframe having twenty-four eight-bit position time slots. Telephone system signalling requires T-1 signalling bits be located in the least significant bit position of each time slot in every sixth frame. In the disclosed system, simultaneous digitized voice and data share a single time slot for transmission along with the T-1 signalling bits in that time slot. In order to achieve the additional capability, the disclosed system employs least and next-to-least digitized voice bit swapping and a data bit occupying the space of the swapped least significant digitized voice bit, which bit is deleted.
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申请公布号 |
US4730312(A) |
申请公布日期 |
1988.03.08 |
申请号 |
US19860832451 |
申请日期 |
1986.02.21 |
申请人 |
SAN/BAR CORPORATION |
发明人 |
JOHNSON, ROBERT D.;MERRITT, JR., GEORGE A.;DAWSON, TERRY L. |
分类号 |
H04M11/06;H04J3/00;H04J3/12;H04J3/16;H04J3/17;(IPC1-7):H04J3/12 |
主分类号 |
H04M11/06 |
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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