12 relations: Called party, Calling party, Click-to-call, Emergency telephone number, Next Generation 9-1-1, Public switched telephone network, Session Description Protocol, Session Initiation Protocol, Telephone call, Telephony, Third Party Control Protocol, Web page.
The called party (in some contexts called the "B-Number") is a person who (or device that) answers a telephone call.
The calling party (in some contexts called the "A-Number") is a person who (or device that) initiates a telephone call.
Click-to-call, also known as click-to-talk, click-to-dial, click-to-chat and click-to-text, namely Webcall is a form of Web-based communication in which a person clicks an object (e.g., button, image or text) to request an immediate connection with another person in real-time either by phone call, Voice-over-Internet-Protocol (VoIP), or text.
In many countries the public switched telephone network has a single emergency telephone number (sometimes known as the universal emergency telephone number or the emergency services number) that allows a caller to contact local emergency services for assistance.
Next Generation 9-1-1 (abbreviated NG9-1-1) refers to an initiative aimed at updating the 9-1-1 service infrastructure in the United States and Canada to improve public emergency communications services in a growingly wireless mobile society.
The public switched telephone network (PSTN) is the aggregate of the world's circuit-switched telephone networks that are operated by national, regional, or local telephony operators, providing infrastructure and services for public telecommunication.
The Session Description Protocol (SDP) is a format for describing streaming media communications parameters.
The Session Initiation Protocol (SIP) is a communications protocol for signaling and controlling multimedia communication sessions in applications of Internet telephony for voice and video calls, in private IP telephone systems, as well as in instant messaging over Internet Protocol (IP) networks.
A telephone call is a connection over a telephone network between the called party and the calling party.
Telephony is the field of technology involving the development, application, and deployment of telecommunication services for the purpose of electronic transmission of voice, fax, or data, between distant parties.
Third Party Control Protocol (TPCP) is a client-server protocol with three types of primitives.
A web page (also written as webpage) is a document that is suitable for the World Wide Web and web browsers.