公开(公告)号：US4435803A

公开(公告)日：1984-03-06

申请号：US322606

申请日：1981-11-18

Applicant: Santanu Das ,  Ramon C. W. Chea, Jr. ,  Russ C. Casterline

Inventor： Santanu Das ,  Ramon C. W. Chea, Jr. ,  Russ C. Casterline

IPC: H04M19/02 ,  H04J3/12 ,  H04Q1/22

CPC classification number: H04M19/02

Abstract: An apparatus and method of organizing line interface modules between analog subscriber lines/trunks and a digital switch with the provision for ringing signals which may be shared by a plurality of lines from a single source is described. The ringing signals are intercoupled to any line or lines and transmitted through a common metallic bus which provides immediate ringing for any line, with a shared ring-trip circuit. A software-controlled and/or programmable signal generator in combination with a novel ring-trip circuit is described wherein ringing cadence is generated by connecting the programmable signal generator to a subscriber line for the proper duration and at any desired frequency, whereby multi-frequency ringing can be accomplished under programmable control. A spare line control function within a cluster of telecommunications line circuits is provided such that any telecommunications line circuit can arbitrarily be designated as a spare line, usable to provide temporary service, for example, to a telephone subscriber having a defective line, thereby permitting scheduled maintenance rather than on-demand maintenance. Immediate ringing is provided to groups of analog telephone lines having shared ringing sources and shared ring-trip circuits in a system architecture compatible with a digital switching system.

Abstract translation: 描述了一种在模拟用户线路/中继线之间组合线路接口模块的装置和方法以及数字开关，其中提供了用于从单个源可以由多条线路共享的振铃信号。 振铃信号相互耦合到任何线路或线路，并通过公共金属总线传输，该总线为任何线路提供立即振铃，并具有共享的环路跳闸电路。 描述了与新颖的环形跳闸电路相结合的软件控制和/或可编程信号发生器，其中通过将可编程信号发生器连接到适当持续时间和任何期望频率的用户线路来产生振铃节奏，由此多频 振铃可以在可编程控制下完成。 提供电信线路电路集群内的备用线路控制功能，使得任何电信线路电路可以任意地被指定为备用线路，可用于例如提供临时业务，例如具有缺陷线路的电话用户，从而允许调度 维护而不是按需维护。 在与数字交换系统兼容的系统架构中，立即振铃被提供给具有共享振铃源和共享环路跳闸电路的模拟电话线路组。