Had I not prerecorded my demos, I would have had to bring along a few Exchange Servers and a telephone switch.

如果没有事先录制好演示内容，我就得带上几台交换服务器和电话交换机了。

youdao

Responsibilities: management and take care of company computers and server, door keeping system and telephone switch.

工作职责：管理维护公司的用户电脑以及服务器，门禁系统，电话交换机。

youdao

Like many other developers with a history in telecom, I learned that when you build a telephone switch, regulations say it must provide dial tone in 40ms, a difficult requirement to achieve.

像许多常年混迹于电信行业中的开发人员一样，我所学习到的是，若实现一个电话交换，则一定要在40毫秒内发出拨号音，这是一个难以实现的需求。

youdao

But while there he learned that in the future the telephone switch would be the big server of data.

FORBES: Cement meets the cyberworld

Just 15 days after the Bay news, Nortel announced a product that combines the features of a telephone switch with a Cisco-like ability to handle Internet traffic.

FORBES: Follow Through

Aided by a couple of Internet telephone veterans, he put the telephone switch at the center of the operating system and made it possible to connect it to almost any Internet phone system (except Skype).

FORBES: Dial D for Disruption