正确答案: B

13

题目：目前我国已使用的国际长途号码最大位长为（ ）位。

解析：B

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举一反三的答案和解析：

[多选题]TBBP530面板上的接口有().

CPRI

El/Tl

[单选题]一条RPBUS最多可以复接()个RP。

32

[单选题]在智能网中，（）提供数据库功能，接收SCP和SMS的访问。

SDP

[多选题]【A popular service that has attercted the interest of companies and has home users alike is the sending of voice signals over an IP-based network, such as the Internet. The practice of making telephone calls over the internet has had a number of different names, including packet voice, voice over packet, voice over the internet, internet telephone, and Voice over Ip（Voip）. But it appears the industry has settled on the term”Voice ove IP” in reference to the internet protocol, which controls the transfer of data over the internet. There are currently three ways to deliver VoIp to users, the first technique is found at the corporate level. Many companies are offering VoIP systerms that operate over a local area network. These systems involve a fair amount of equipment, such as VoIP servers, special IP-enabled telephones, and routers that can direct telephone calls. Today a large portion of corporate sites have converted their older internal telephone systems to VoIP systems that opreate over a LAN, thus converging two systems into one. A second common solution is the one often encountered at home. Using existing telephones, a special converter is added between the telephone and a high speed internet（DSL or cable modem）connection. The converter digitizes the voice signal and creates a stream of packets that are then sent over an ip connection.The third technique involves smart cell phones. Never cell technologies are all packet-based, thus requiring a telephone call to be converted to digital packets and sending those packets over IP networks.】From the paragraph above，a popular service that has attracetd the interest of companies and home users,is termed as （） . The data transfer over the Internet is controlled by the （） . At corporate level, many companies have replaced their older internal telephone systerms with （） that oprerate over a local area network.

voice over the internet B、voice over packet

Voice over IP

industry

VoIP servers

解析：C,B,A

[单选题]下列选项中，属于B型业务的是().

两者都不是

[单选题]关于上行同步调整，下列哪一项描述是正确的：()

将UE数据到达时间同基站期望的时间比较，产生SS命令。

[单选题]Skype是一个网络电话工具，用户通过在电脑上安装Skype户端软件并注册，既可与 其他用户语音通话，也可拨打固定电话，这是一种（ ）服务。

IP电话

[单选题]移动性管理的位置登记包括（ ）和新位置区的注册两个过程。

旧位置区的删除