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Specifications for proprietary protocols may or may not be published, and implementations are not freely distributed. Proprietors may enforce restrictions through control of the intellectual property rights, for example through enforcement of patent rights, and by keeping the protocol specification a trade secret. Some proprietary protocols ...
Open System for Communication in Realtime (OSCAR) is AOL's proprietary instant messaging and presence information protocol. It was used by AOL's AIM instant messaging system and ICQ . Despite its name, the specifications for the protocol remain proprietary.
The Skype protocol is a proprietary network used for Internet telephony. Its specifications are not publicly available, and all official applications based on the protocol are closed-source. It lacks interoperability with most Voice over IP (VoIP) networks, so it requires licensing from Skype for any integration.
Systems Network Architecture [1] (SNA) is IBM's proprietary networking architecture, created in 1974. [2] It is a complete protocol stack for interconnecting computers and their resources. SNA describes formats and protocols but, in itself, is not a piece of software.
Separately, proprietary data communication protocols emerged, most notably IBM's Systems Network Architecture in 1974 and Digital Equipment Corporation's DECnet in 1975. The United States Department of Defense (DoD) developed TCP/IP during the 1970s in collaboration with universities and researchers in the US, UK and France.
DNP3 - a protocol used to communicate by industrial control and utility SCADA systems; DirectNet – Koyo / Automation Direct proprietary, yet documented PLC interface; EtherCAT; Ethernet Global Data (EGD) – GE Fanuc PLCs (see also SRTP) EtherNet/IP – IP stands for "Industrial Protocol". An implementation of CIP, originally created by ...
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Open Platform Communications (OPC) is a series of standards and specifications for industrial telecommunication. They are based on Object Linking and Embedding (OLE) for process control . An industrial automation task force developed the original standard in 1996 under the name OLE for Process Control .