描述
继电器结构示意图，它主要由电磁线圈、铁心、触点和复位弹簧组成。继电器有两种不同的触点，在线圈断电时处于断开状态的触点称为常开触点(如图1-2中的触3，4)，处于闭合状态的触点称为常闭触点(如图1-2中的触点1，2)。
Avaya Lucent AT&T Definity TN2224B V13 2W Digital Line
Avaya Lucent AT&T Definity TN464F V16 DS1 INTFC 24/32
Avaya Lucent AT&T Definity TN464GP DS1 INTFC 24/32
Avaya Lucent AT&T Definity TN553 V3 Packet Data Line
Avaya Lucent AT&T Definity TN570B V4 Expansion INTFC
Avaya Lucent AT&T Definity TN573 V14 Switch Node INTF
Avaya Lucent AT&T Definity TN573B V3 Switch Node INTF
Avaya Lucent AT&T Definity TN577 V10 Packet Gateway
Avaya Lucent AT&T Definity TN726B V3 Data Line
Avaya Lucent AT&T Definity TN742 V10 Analog Line Card
Avaya Lucent AT&T Definity TN746 V17 Analog Line Card
Avaya Lucent AT&T Definity TN750B V2 Announcement
Avaya Lucent AT&T Definity TN754 V14 Digital Line Card
