NOKIA METROSITE BASE STATION的容量最大可配置（）个TRXS。

【An overall cellular network contains a number of different elements from the base transceiver station (BTS) itself with its antenna back through a base station controller (BSC), and a mobile switching centre (MSC) to the location registers (HLR and VLR) and the link to the public switched telephone network (PSTN). Of the units within the cellular network, the BTS provides the direct communication with the mobile phones. There may be a small number of base stations then linked to a base station controller. This unit acts as a small centre to route calls to the required base station, and it also makes some decisions about which of the base station is best suited to a particular call. The links between the BTS and the BSC may use either land lines of even microwave links. Often the BTS antenna towers also support a small microwave dish antenna used for the link to the BSC. The BSC is often co-located with a BTS. The BSC interfaces with the mobile switching centre. This makes more widespread choices about the routing of calls and interfaces to the land line based PSTN as well as the HLR and VLR.】 From the paragraph above, in a cellular network, the （98） can provide direct communication with a mobile phone, the （99） acts as a small centre to route calls to the required base station, and it also makes some decisions about which of the base station is best suited to a particular call.（100） can be used to link the BSC with related BTS。

A. BSC B. BTS C. MSC D. VLR A. BSC B. BTS C. MSC D. HLR A. Land lines B. Microwave links C. Microwave dish antenna D. Land lines or microwave links

一台交换机具有48个10/100BASE-TX端口与2个可扩展的1000BASE-X端口，那么这台交换机全双工满配置的情况下，总带宽为( )。

A.8.8G

B.13.6G

C.12.5G

D.14.8

R10BSC中有1个小区，配置有1个EDGE载波，1个SDCCH，TN=1，6个EPDCH。小区内有4个用户正在通话，占用TS2-TS5。TS6-7处于IDLE状态。小区保持工作稳定，即信号质量均保持。这时，分别有1台NOKIA6230的MS和1台NOKIA6230i的MS在小区内开始下载10MBYTE的文件。DUMETER显示平均下载速率均为60Kbps。1分钟后，占用TS3的用户结束通话，以下说法正确的是：（）

A.两个用户的下载速率保持不变；

B.两个用户的下载速率均明显上升；

C.NOKIA6230传输中断，而NOKIA6230i下载速率上升。

D.NOKIA6230传输中断，而NOKIA6230i数据传输中断。

A.3-N

B.8-N

C.9-N

D.10-N

一种交换机具有36个10／100Base—TX端口与2个可扩展的1000Base—x端口，那么在交换机满配置的情况下，其全双工端口总带宽为——。

A．360Mbps

B．4．6Gbps

C．11．2Gbps

D．22．4Gbps

一种交换机具有48个10/100BASE—TX端口与2个可扩展的1000BASE-x端口，那么在交换机满配置的情况下，其全双工端口的总带宽为

A.480 Mbps

B.5.8 Gbps

C.13.6 Gbps

D.27.2 Gbps

In 8011 terminology．all communication was to go through the base station, called an(75)

A．Access Channel

B．Access System

C．Access Point

D．Network Access Point

某台交换机具有48个10/100BASE-TX自适应端口与2个可扩展的1000BASE-X端口，那么在该交换机满配置的情况下，其背板带宽较适合选择为(23)。

A．6.8Gbps

B．13.6Gbps

C．16Gbps

D．40Gbps

A.Assignment Request

B.Assignment Completion

C.Page Response

D.Base Station Ack Order

The line connecting the Loran-C master station with a secondary station is called the ______．

A.Focus line

B.Base line

C.Side line

D.Center line