This Recommendation provides the stage 2 service description of the Three - Party supplementary service.

该建议提供三方补充业务的第2级业务描述.

互联网

This Recommendation provides the stage 2 service description of the International Telecommunication Charge Card supplementary service.

本建议提供国际电信计费卡补充业务的第2级业务描述.

互联网

Reverse Charging is a supplementary service offered to the calling and called users.

反向计费是向主叫和被叫用户提供的补充业务.

互联网