首页 / 专利库 / 图形技术 / 去振铃 / Caller selecting circuit for telephone system

Caller selecting circuit for telephone system

阅读:486发布:2021-07-01

专利汇可以提供Caller selecting circuit for telephone system专利检索,专利查询,专利分析的服务。并且PURPOSE: To eliminate going near a telephone system for the recognization of a caller by informing an incoming from the caller only when an answering message is transmitted in correspondence to a responding message.
CONSTITUTION: A responding message sending means 22 to execut the sending action of the responding message through a telephone line to a caller by detecting a ringer signal transmitted from the caller, a sound signal detecting circuit 24 to detect the presence or absence of an answering message transmitted from the caller in correspondence to the responding message and a ringing generating circuit 27 to execute the generating action of the ringing by detecting the presence of the answering message with the sound signal detecting circuit 24 are equipped. Thus, since a telephone system executes the selecting action of the caller without going near the telephone system in each time the call signal from the caller is transmitted, operations are widely reduced and completed without receiving troubles due to a silent call.
COPYRIGHT: (C)1988,JPO&Japio,下面是Caller selecting circuit for telephone system专利的具体信息内容。

高效检索全球专利

专利汇是专利免费检索,专利查询,专利分析-国家发明专利查询检索分析平台,是提供专利分析,专利查询,专利检索等数据服务功能的知识产权数据服务商。

我们的产品包含105个国家的1.26亿组数据,免费查、免费专利分析。

申请试用

分析报告

专利汇分析报告产品可以对行业情报数据进行梳理分析,涉及维度包括行业专利基本状况分析、地域分析、技术分析、发明人分析、申请人分析、专利权人分析、失效分析、核心专利分析、法律分析、研发重点分析、企业专利处境分析、技术处境分析、专利寿命分析、企业定位分析、引证分析等超过60个分析角度,系统通过AI智能系统对图表进行解读,只需1分钟,一键生成行业专利分析报告。

申请试用

QQ群二维码
意见反馈