The present invention is a two line phone adaptor that allows two separate phone lines to be connected to and controlled by a single line DTMF phone. The two line phone adaptor has one ring detector for each line and one hold circuit for each line. The adaptor also has an electronic line...
multi-channel phone system to absatzweisen transmission of multiple simultaneous news from the same line 来自 掌桥科研 喜欢 0 阅读量: 3 申请(专利)号: DEI0009295A 申请日期: 1954-10-26 公开/公告号: DE000001090726A 公开/公告日期: 1960-10-13 ...
A telephone system communicating through a plurality of external telephone lines includes base phones connected to respective ones of the plurality of telephone lines and a cable connected so as to allow communication among a plurality of terminals. Each base phone includes a dual-line adaptation ...
Line2 is the perfect small business phone system, providing multiple phone lines across devices. View plans and choose your toll-free number.
5627833Digital added main line system with power-up and power-down features1997-05-06Bliven370/464 5621731Private exchange for ISDN1997-04-15Dale et al.370/79 5610922Voice plus 4-wire DDS multiplexer1997-03-11Balatoni370/468 5598413Four-wire, half-rate architecture with embedded differential delay...
Wireless Building Gate Classroom School Office Multiple Intercom System Systems For Home Video Door Phone With Screen, You can get more details about Wireless Building Gate Classroom School Office Multiple Intercom System Systems For Home Video Door Phon
PROBLEM TO BE SOLVED: To provide a video doorphone system for multiple dwelling house that simplifies its installation.;SOLUTION: This invention provides the video doorphone system for multiple dwelling house where an integrated entrance unit 1 having a camera 1a, a speech circuit 1b, and a cha...
multiplelineappearancesperphone网络多号码 网络释义 1. 多号码 ...llsperlineappearance)、一终端多号码(Multiplelineappearancesperphone)、多终端共用一号码等方式的通话功能外,具有丰 …network.51cto.com|基于1 个网页© 2024 Microsoft 隐私声明和 Cookie 法律声明 广告 帮助 反馈...
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