allow people to carry telephone with them all the time
使人们能够随时随身携带电话 

Calls were connected manually by switchboard operators.
过去电话由接员人工接通。 

Cellular telephones can be used to access information virtually anywhere and anytime.
手机实际上可以用于随时随地接收信息。 

make wireless communication possible
使无线通讯成为可能

phone can connect to the Internet
手机可以连接到互联网

send a short text message to sb.’s cell phone
给某人的手机发短信

cable television systems
有线电视系统

digital television
数字电视

pick up the signals from satellites
通过卫星接收信号 

provide a large number of (many more) channels
提供很多(更多)频道

satellite television service
卫星电视业务 

advances in digital communications
数字通讯的发展 

improve the quality and efficiency of telecommunication
提高远程通讯的质量和效率 

modern digital telecommunication
现代数字远程通讯 

send messages faster and more accurately
更快、更准确地传送信息