UNIStim
Encyclopedia
UNIStim is a Telecommunications protocol
developed by Nortel (now acquired by Avaya
) for IP Phone (terminals and soft phones) and IP PBX communications.
Most manufacturers of IP PBX
equipment (Aastra, Alcatel
, Avaya
...) have followed the same path, developing their own proprietary protocol
s. These protocols are being gradually replaced or complemented by standardized protocols, including H.323
, especially SIP
.
Nortel
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 Nortel
IP PBX systems and its IP Centrex platforms from 1996. Contributions common between Nortel
and Cisco Systems
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 Avaya
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.
Communications protocol
A communications protocol is a system of digital message formats and rules for exchanging those messages in or between computing systems and in telecommunications...
developed by Nortel (now acquired by Avaya
Avaya
Avaya Inc. is a privately held computer networking, information technology and telecommunications company that is a global provider of business communications systems. The international head quarters is in Basking Ridge, New Jersey, United States...
) for IP Phone (terminals and soft phones) and IP PBX communications.
Most manufacturers of IP PBX
IP PBX
An IP PBX is a business telephone system designed to deliver voice or video over a data network and interoperate with the normal Public Switched Telephone Network ....
equipment (Aastra, Alcatel
Alcatel
Alcatel Mobile Phones is a brand of mobile handsets. It was established in 2004 as a joint venture between Alcatel-Lucent of France and TCL Communication of China....
, Avaya
Avaya
Avaya Inc. is a privately held computer networking, information technology and telecommunications company that is a global provider of business communications systems. The international head quarters is in Basking Ridge, New Jersey, United States...
...) have followed the same path, developing their own proprietary protocol
Proprietary protocol
In telecommunications, a proprietary protocol is a communications protocol owned by a single organization or individual.-Enforcement:Proprietors may enforce restrictions through patents and by keeping the protocol specification a trade secret...
s. These protocols are being gradually replaced or complemented by standardized protocols, including H.323
H.323
H.323 is a recommendation from the ITU Telecommunication Standardization Sector that defines the protocols to provide audio-visual communication sessions on any packet network...
, especially SIP
Session Initiation Protocol
The Session Initiation Protocol is an IETF-defined signaling protocol widely used for controlling communication sessions such as voice and video calls over Internet Protocol . The protocol can be used for creating, modifying and terminating two-party or multiparty sessions...
.
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
Nortel Networks Corporation, formerly known as Northern Telecom Limited and sometimes known simply as Nortel, was a multinational telecommunications equipment manufacturer headquartered in Mississauga, Ontario, Canada...
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 Nortel
Nortel
Nortel Networks Corporation, formerly known as Northern Telecom Limited and sometimes known simply as Nortel, was a multinational telecommunications equipment manufacturer headquartered in Mississauga, Ontario, Canada...
IP PBX systems and its IP Centrex platforms from 1996. Contributions common between Nortel
Nortel
Nortel Networks Corporation, formerly known as Northern Telecom Limited and sometimes known simply as Nortel, was a multinational telecommunications equipment manufacturer headquartered in Mississauga, Ontario, Canada...
and Cisco Systems
Cisco Systems
Cisco Systems, Inc. is an American multinational corporation headquartered in San Jose, California, United States, that designs and sells consumer electronics, networking, voice, and communications technology and services. Cisco has more than 70,000 employees and annual revenue of US$...
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 Avaya
Avaya
Avaya Inc. is a privately held computer networking, information technology and telecommunications company that is a global provider of business communications systems. The international head quarters is in Basking Ridge, New Jersey, United States...
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
Nortel Communication Server 2100
The Avaya Communication Server 2100 or CS-2100 in computer networking, telecomunications and IP telephony is a carrier grade, IP soft switch or VoIP server solution for large campus and geographically dispersed large enterprises...
enables encryption of the UNIStim protocol with the use of a SMC 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
See also
- H.323H.323H.323 is a recommendation from the ITU Telecommunication Standardization Sector that defines the protocols to provide audio-visual communication sessions on any packet network...
- MGCP
- SIPSession Initiation ProtocolThe Session Initiation Protocol is an IETF-defined signaling protocol widely used for controlling communication sessions such as voice and video calls over Internet Protocol . The protocol can be used for creating, modifying and terminating two-party or multiparty sessions...
- List of Nortel patents