UNIStim (or Unified Networks IP Stimulus) is a deprecated

Telecommunications Telecommunication is the transmission of information by various types of technologies over wire, radio, optical, or other electromagnetic systems. It has its origin in the desire of humans for communication over a distance greater than that fe ...

protocol Protocol may refer to: Sociology and politics * Protocol (politics), a formal agreement between nation states * Protocol (diplomacy), the etiquette of diplomacy and affairs of state * Etiquette, a code of personal behavior Science and technolog ...

developed by Nortel (now acquired by

Avaya Avaya Holdings Corp., often shortened to Avaya (), is an American multinational technology company headquartered in Durham, North Carolina, that provides cloud communications and workstream collaboration services. The company's platform inclu ...

) for IP Phone (terminals and soft phones) and IP PBX communications. Most manufacturers of

IP PBX An IP PBX ("Internet Protocol private branch exchange") is a system that connects telephone extensions to the public switched telephone network (PSTN) and provides internal communication for a business. An IP PBX is a PBX system with IP connectivi ...

equipment (

Aastra Aastra Technologies Limited, formerly headquartered in Concord, Ontario, Canada, made products and systems for accessing communication networks, including the Internet. Its products included residential and business telephone terminals, screen ...

Alcatel Alcatel may refer to: * Alcatel, a former French telecommunications equipment company, which became Alcatel-Lucent and is now part of Nokia * Alcatel Mobile, a brand of mobile phones, tablets and wearables, formerly a joint venture between Alcatel ...

...) have followed the same path, developing their own

proprietary protocol In telecommunications, a proprietary protocol is a communications protocol owned by a single organization or individual. Intellectual property rights and enforcement Ownership by a single organization gives the owner the ability to place restricti ...

s. These protocols are being gradually replaced or complemented by standardized protocols, including H.323, especially SIP.

Operating principle

The protocols works through a "master" / "slave" mode of operations. They simply reflect the basic actions a user can perform on his terminal (such as press a button) and the commands that can be sent to the display through the network to the terminal (such as turn a light on or display a message ). The "stimulus" can implement easily any new facility telephone without having to modify the software embedded in the terminals, which simplifies the procedures for maintenance and upgrade of the installed base. In this sense, the stimulus protocols differ from functional protocols (such as SIP or H.323) that impose on the one hand that the service is defined in the standard and that the terminal loads specific logic corresponding to the service in question. This approach allows manufacturers to quickly deliver a wide range of services without having to wait until these services are standardized.

Nortel Nortel Networks Corporation (Nortel), formerly Northern Telecom Limited, was a Canadian multinational telecommunications and data networking equipment manufacturer headquartered in Ottawa, Ontario, Canada. It was founded in Montreal, Quebec, ...

has been very active in the standardization effort of these protocols within the IETF, drawing on its work with pre-standard UNIStim and already developed work on the

IP PBX systems and its IP Centrex platforms from 1996. Contributions common between

and

Cisco Systems Cisco Systems, Inc., commonly known as Cisco, is an American-based multinational digital communications technology conglomerate corporation headquartered in San Jose, California. Cisco develops, manufactures, and sells networking hardware, ...

for example culminated in the publication of the IETF RFC 3054 "Media Gateway IP Phone Application Profile" outlining the options in the protocol Megaco/H.248 for IP command posts. The UNIStim protocol is implemented on

IP PBX systems and licensed by third-party suppliers → History See for example the release of the company Spectralink, Details on the implementation of the protocol UNISTIM are available in the document "Telephony and Data Network Services at a Telephone", filed in the United States Patent No. 7068641 on May 7, 1999. The Secure UNIStim protocol is implemented on the AS5300 or the CS2100 enables encryption of the UNIStim protocol with the use of a SMC 2450.
Secure Multimedia Controller 2450

Ports

* 4100/udp Nortel UNIStim (Unified Networks IP Stimulus), i200x * 5000/rudp Nortel UNIStim (Unified Networks IP Stimulus), i2002/i2004 on ITG Line * 5100/rudp Nortel UNIStim (Unified Networks IP Stimulus), ITG Line * 5105/udp Nortel UNIStim (Unified Networks IP Stimulus) FTP (UFTP) * 6800/tcp Nortel Unified Manager * 7000/rudp Nortel UNIStim (Unified Networks IP Stimulus), BCM FP1 VoIP to/from IP Phones

Operating principle

Ports

See also

References

Further reading