The invention relates to a modular jack for telephone equipment. The jack has a pair of switch contact springs which are activated only when a plug of a specific shape is inserted into the jack.
申请公布号
US4699443(A)
申请公布日期
1987.10.13
申请号
US19860863364
申请日期
1986.05.15
申请人
AMERICAN TELEPHONE AND TELEGRAPH COMPANY;AT&T INFORMATION SYSTEMS INC.;AT&T TECHNOLOGIES, INC.