[普通电话]
[市内用户中继（模拟）]
[一线通（N-ISDN）2B+D]
[市内用户中继（数字）]
[程控电话新业务]
[ISDN补充业务]
[公用电话]
[集中式交换机CENTREX业务]
[特服接入电话]
[用户交换机、集团电话]
[用户（终端）接入补充业务]

[长途自动电话]
[国际电话]
[会议电话]
[交互式会议电话]
[会议电视]
[IP电话直拨17909]

[300电话卡]
[IC电话卡业务]
[IP电话卡]
[201电话卡]
[上网卡]
[宜通卡]
[202缴费卡]

[DDN业务]
[帧中继业务]
[ATM业务]
[分组交换]
[互联网接入服务]
[互联网平台服务]
[网络元素出租业务]
　

[网间互联]
[电报与传真]
[宽带业务]
[无线业务]
[媒体业务]
[代维代营业务]