1operator (of a power station, transport network etc)
2carrier (telecommunications etc)
Example
diàn huà电话yùn yíng shāng运营商tí shì提示lái diàn来电rén人děng hòu等候jiē tōng接通。
电话运营商提示来电人等候接通。
The telephone operator asked the caller to hold on until a connection was made.