发明名称 |
Telecommunication line circuit |
摘要 |
Telecommunication line circuit including a Herter bridge with a first pair of terminals coupled to a bidirectional 2-wire line, a second pair of terminals coupled to an exchange, and a third pair of terminals where longitudinal currents are eliminated from sensed signals, as well as a ringing generator that may be coupled across the second pair of terminals which is coupled to a receive leg of a 4-wire exchange circuit and, through switching means to a ringing generator while the third pair of terminals is coupled to a transmit leg of the 4-wire exchange circuit.
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申请公布号 |
US4837818(A) |
申请公布日期 |
1989.06.06 |
申请号 |
US19860852609 |
申请日期 |
1986.04.16 |
申请人 |
ALCATEL N.V. |
发明人 |
PIETERS, JOZEF F. P.;MARIE GUEBELS, PIERRE-PAUL F. M. |
分类号 |
H04M3/00;H04M3/22;H04M19/00;H04M19/02 |
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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