SIP（Session Initiation Protocol，会话发起协议）是由IETF（Interne工程任务组） 提 出的IP电话信令协议。正如其名字所隐含的，SIP用于发起会话，它能控制 ...

SIP trunking connects your PBX phone system to the cloud for internet-based calling. This benefits your business by lowering ...

Mitel offers the MiVoice 5304 IP Phone as an entry-level device that supports both SIP and MiNet protocols. Its compact design means that it is particularly well suited to being deployed in ...

An organization that provides voice over IP (VoIP) service and enables calling from SIP phones to plain-old-telephone (POTS) lines and vice versa. SIP is the universal protocol used for Internet ...