| Subject | English | Chinese simplified |
| comp., MS | Session Initiation Protocol | 会话初始协议 (A standard signaling protocol for establishing multi-media communications sessions between two or more users over an IP network) |
| comp., MS | Session Initiation Protocol trunking | 会话初始协议中继 (A mechanism for connecting the voice network of an enterprise to a service provider that offers public switched telephone network (PSTN) origination, termination, and emergency services without deploying PSTN gateways) |