telephony services 电话服务
digital telephony 数字电话
telephony systems 电话系统
mobile telephony 移动电话
A: How is the new telephony system working in your office?
A:你办公室的新电话系统运作得怎么样?
B: It's much more efficient than the old one.
B:它比旧的系统效率高多了。
1) 电话通信技术
2) 电话服务
3) 电话系统
1. 电话通信
noun
1. the technology or system of transmitting voices over a distance using telephones