电话交换台，电话交换机
Operate telephone switchboard to answer, screen, and forward calls, providing information, taking messages and scheduling appointments.
负责接听公司电话总机和转接电话，提供并转达相关信息，安排预约。
Here he oversaw a staff of technicians who watched visual monitors, computer readouts, and a telephone switchboard that kept him in contact with the many security personnel he commanded.
在这里他监督所有技术人员监视着屏幕，电脑输出以及电话总机，并与所有他手下的安全人员保持联系。
Will you cover for me at the telephone switchboard while I run out to post a letter?
你可否在电话交换台那儿暂且替我应付一下?我跑出去寄一封信。
A SOCKS server is similar to an old-fashioned telephone switchboard.
SOCKS 服务器类似于老式的电话交换机。
The girls will man the telephone switchboard till we get back.
姑娘们将在电话总机上值机，直到我们回来。
In four, the company responsible for the telephone switchboard wiring work.
负责公司电话小总机的接线工作。
Communication: the property should have telephone switchboard or direct lines and CATV access.
通讯：最好留有总机或相应的直线电话，具备有线电视接入；
Tom will man the telephone switchboard till we get back.
我们回来前由汤姆管理电话总机。
Notified by telephone switchboard of your hotel location.
电话通知酒店总机您的方位。
Responsible for operation of telephone switchboard, meeting and greeting clients and visitors to the firm.
负责操作电话系统，接待到访的客户和访客。
In this view, a manager is sometimes likened to a telephone switchboard .
根据这个观点，有时候把管理者比拟为电话总机。
This article is proposed to develop a new type of digit programme-controlled telephone switching board which is based upon the CAN bus to replace the old automatic telephone switchboard.
本文提出研制新型的基于CAN总线的数字程控交换机替换原有的全电子式自动电话交换机。
TG, AG the telephone switchboard main application like IP supermarket, the speech, the hotel and so on some situations, provide the tool for the operator which one kind of idea spends and manages.
AG话务台主要应用如IP超市，话吧，酒店等一些场合，为经营者提供一种计费和管理的工具。
Without dedicated data line, TSSS can connect general telephone set, switchboard, group telephone exchange or telephone outer ports of extension.
该直选台能直接和普通电话机、交换机、集团电话总机或分机的电话外线连接，无需专用数据线。
HWK-1A non switchboard indoor telephone commutator connect YX-1(2) indoor loud box.
HWK-1A型无主机室内电话扩音转接器配接YX-1（2）型室内音箱。
The equipment has the function of call the HWB non switchboard anti-explosive telephone from program attemper to realize automatic connecting from switchboard to non switchboard.
室内程控电话转接器具有程控调度电话对HWB型无主机防爆电话扩音通讯系统进行呼叫通话，实现调度电话和无主机防爆电话站自动转接功能。
Communication between Earth and spacecraft is clunky and reminiscent of the days when switchboard operators had to plug in telephone lines by hand to connect the people at either end.
就连地球与太空船的之间的通讯也显得力不从心，让人想起要靠接线员手动插拔电话线来连接电话两头的旧日。
The lessee shall be responsible for the design and installation of telephone wiring from the tube well to the lessee switchboard intake port, and for the cost thus incurred.
从电话竖井至租户总机入口端由租户自行设计及安装，费用由租户自行承担。
|telephone exchange;电话交换台，电话交换机
"Telephone switchboard"（电话交换机）是电信系统中用于连接多个电话线路并实现通话转接的核心设备。其核心功能是通过人工或自动方式建立临时通信路径，使不同终端用户之间实现语音通信。该技术起源于19世纪末，最初采用人工插拔线路的方式操作，后期发展为电子程控系统，成为现代通信网络的基础设施。
从技术演进角度看，电话交换机可分为三大阶段：
在通信原理层面，交换机通过时分复用（TDM）或分组交换技术分配通信资源。其核心公式可表示为： $$ C = N times frac{B}{log_2(1+frac{S}{N})} $$ 其中$C$为信道容量，$N$为信道数量，$B$为带宽，$S/N$为信噪比。这种数学模型为交换机设计提供了理论基础。
Telephone Switchboard 的详细解释如下：
Telephone switchboard（电话总机/交换机）是一种用于管理和连接电话线路的设备，通过手动或自动方式将不同通话线路相互接通，实现电话通信。早期的电话系统依赖人工操作，接线员通过插拔线路完成通话连接；现代则多为自动化电子交换机。
如需进一步了解电话技术发展史，可参考中关于贝尔发明电话的内容。
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