文章主要就美国新泽西州多佛城推行的光纤-同轴电缆视频拨号交换网商用中所取得的经验教训作了分析和研究。
This article examines the lessons learned from the commercial deployment of a switched fiber-coax video dial tone network in Dover Township, New Jersey, USA.
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。
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.
在过去的几周里，我四处在寻觅着一个“商业支撑下、基于云的并可提供拨号音的网络电话交换机”，而一直无法享用SIP电话。
I've been looking around for a "commercially supported cloud-based VOIP PBX that provides dial tone" for the past few weeks and I keep coming up empty on the SIP phones.
如果是在同一个交换机的电话拨号，那么连接将直接接到目的地。
If the call is to a phone within the same exchange, the connection can be made directly to the destination.
旨在促进在威尔士宽带需求-琼斯杂志排行榜的家庭，他们作出的冒险从拨号到宽带交换机。
Aimed to stimulate demand for broadband within Wales - the Journal charts the adventures of the Jones family as they make the switch from dialup to broadband.
局部交换机包括了交换逻辑和决定拨号的路径。
The local exchange contains switching logic and determines where to route a call.
多数人承认随着新世纪的到来，交换机不大可能丢失拨号音，会继续提供电话处理，但观察家们告诫说一些重要的附属功能可能会失去。
While most admit that switches aren't likely to lose dial tone and will continue to provide call processing as the new century kicks off, they caution the important adjunct functionality may be lost.
要在适当的问题米，使用重点测光或浅米，读至m，在曝光的曝光拨号，交换机相机重新构图和拍摄现场。
To meter on the appropriate subject, using spot metering or light meter, read the exposure, switch camera to m, dial in the exposure and recompose the scene and shoot.
FCC在NAS报告的基础上建立用户交换机、拨号器及应答设备委员会以推荐认证标准。
FCC establishes the PBX and Dialer and Answering Devices Committees to recommend certification standards based on the NAS Report.
电话公司也对部署具有七号信令功能的接入交换机感兴趣，以提供新的服务和把因特网拨号通话从话音网络中解脱出来。
Telephone companies are interested in deploying SS7-capable access switches to offer new services and to off-load the Internet dial-up calls from the voice network.
在这里概述的题目包括点对点链路，电路交换，分组包交换，虚电路，拨号服务，和WAN设备。
Topics summarized here include point-to-point links, circuit switching, packet switching, virtual circuits, dialup services, and WAN devices.
在这里概述的题目包括点对点链路，电路交换，分组包交换，虚电路，拨号服务，和WAN设备。
Topics summarized here include point-to-point links, circuit switching, packet switching, virtual circuits, dialup services, and WAN devices.
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