RJ11连接器与电话接口详细介绍
因为这种线序中第3、4对双绞线中的两线相距较远，会引起较大的串扰，不适合Ethernet这种高频信号的传输。
还有一种RJ48连接器，也是8P8C，可用于连接4对T1数据链路，每对线可传输时分复用的23个话路。
其他不太常用的RJ系列连接器还有：
RJ2MB: 50-pin miniature ribbon connector
RJ12C/RJ12W: 6P6C, for one telephone line ahead of the key system
RJ13C/RJ13W: 6P4C, for one telephone line behind the key system
RJ15C: 3-pin weatherproof, for one telephone line
RJ18C/RJ18W : 6P6C, for one telephone line with make-busy arrangement
RJ21X: 50-pin miniature ribbon connector, for up to 25 lines
RJ26X: 50-pin miniature ribbon connector, for multiple data lines RJ27X: 50-pin miniature ribbon connector, for multiple data lines
RJ31X: 8P8C (usually only 4C are used), single line with alarm - center pins #4 #5 connect to phone line; outside pins #1 #8 connect to another phone jack allowing the alarm dialer or medical alert system to dial the monitoring company when triggered.
RJ38X: 8P8C, similar to RJ31 but a connection between pin #2 #7 indicates that a plug is inserted.
RJ41S: 8P8C keyed, for one data line, universal
RJ45S: 8P2C + keyed, for one data line with programming resistor
RJ49C: 8P8C, for ISDN BRI via NT1
RJ50: 10P10C, same size as RJ45 but with ten contacts Business phone
RJ71C: 12 line series connection using 50 pin connector
加入微信
获取电子行业最新资讯
搜索微信公众号：EEPW
或用微信扫描左侧二维码