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Topic: Communications protocol


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  Communications protocol - Wikipedia, the free encyclopedia
In the field of telecommunications, a communications protocol is the set of standard rules for data representation, signalling, authentication and error detection required to send information over a communications channel.
An example of a simple communications protocol adapted to voice communication is the case of a radio dispatcher talking to mobile stations.
Protocol layering allows the parts of a protocol to be designed and tested without a combinatorial explosion of cases, keeping each design relatively simple.
en.wikipedia.org /wiki/Communications_protocol   (1256 words)

  
 Communications Protocols   (Site not responding. Last check: 2007-11-05)
Protocols are normally defined in a layered manner and provide all or part of the services specified by a layer of the OSI reference model.
Protocols are usually implemented by writing a number of programs (processes) which communicate with one another through queues and by function calls.
Protocols are generally described using a layered architecture known as the OSI reference model.
www.erg.abdn.ac.uk /users/gorry/course/intro-pages/protocols.html   (482 words)

  
 (Features) Communications-protocol testing: Balancing technology, planning, compliance (MEM archive, Oct 04)
Communications software is unique in that the software for both sides of the communication needs to be working to fully exercise the software on either side (unless some type of simulation is used).
More often than not, these devices are communications monitors, and, while useful for examining the communications traffic on the communications medium, they are typically limited in their ability to insert errors to test the handling on both sides of the communication.
Communications interfaces in medical devices are notorious for their ability to defy traditional manual test efforts for exposing communication software defects.
www.devicelink.com /mem/archive/04/10/008.html   (2382 words)

  
 RFC 3304 (rfc3304) - Middlebox Communications (midcom) Protocol Requiremen   (Site not responding. Last check: 2007-11-05)
This states that the protocol must include mechanisms for avoiding race conditions or other situations in which the requests of one agent may influence the results of the requests of other agents in an unpredictable manner.
This states that the protocol must provide clear identification for requests and results and that protocol operations must be atomic with respect to the midcom protocol.
The protocol must support the concept of a ruleset group comprising a multiple of individual rulesets to be treated as an aggregate.
www.faqs.org /rfcs/rfc3304.html   (1729 words)

  
 Microsoft Communications Protocol Program
Microsoft accordingly encourages developers interested in licensing the company's protocol technology for purposes other than described in the standard MCPP license agreement (for example initializing the Rights Management Services environment) to discuss their technical requirements with Microsoft's protocol licensing team so that a suitable solution can be worked out.
Many of the protocols used by Windows 2000 and Windows XP client operating systems to interoperate or communicate with Microsoft server operating systems are available through standards organizations or are otherwise published and available from third-party sources.
A royalty-free license for such published protocols is available from Microsoft for those who want to ensure that they have a license under any intellectual property rights Microsoft may have in any or all of those published protocols.
members.microsoft.com /consent/info/LicenseOverview.aspx   (1492 words)

  
 Telecommunications system comprising a communications protocol analyzer which comprises a neural network that obviates ...
Communications protocols are often sophisticated, involving a sequence of complex message exchanges.
Known protocol analysers for testing communications protocols involve the use of data bases, which are pre-programmed with all possible combinations of messages sequences which correspond with the protocol to be tested.
By using a neural network within the protocol analyser, a sequence of messages exchanged in accordance with a correctly operating communications protocol may be learned, obviating the need for a data base.
www.delphion.com /details?pn10=US05870399   (313 words)

  
 RFC 4097 (rfc4097) - Middlebox Communications (MIDCOM) Protocol Evaluation   (Site not responding. Last check: 2007-11-05)
The protocol is designed as a base protocol in RFC 3588 [24] to be supported by all implementations, plus extensions devoted to specific applications.
The protocol is also stateful in that it allows the server to push configuration information to the client, and then allows the server to remove such state from the client when it is no longer applicable.
Protocol Machinery This section describes the compliancy of the proposed protocols against the protocol machinery requirements from section 2.1 of the requirements document [1].
www.faqs.org /rfcs/rfc4097.html   (11550 words)

  
 What is communications protocol? - A Word Definition From the Webopedia Computer Dictionary   (Site not responding. Last check: 2007-11-05)
All communications between devices require that the devices agree on the format of the data.
These protocols are almost always implemented in the hardware; that is, they are built into modems.
In addition to the standard protocols listed in the table, there are a number of protocols that complement these standards by adding additional functions such as file transfer capability, error detection and recovery, and data compression.
www.webopedia.com /TERM/C/communications_protocol.html   (658 words)

  
 FCP - Five-bit Communications Protocol
The Five-bit Communications Protocol (FCP) is a method of communicating, similar to Baudot code, that uses two states (expressed as '1' and '0') to represent characters in fixed five-bit code sizes and which also defines a standard procedure for transmissions.
This protocol is designed to be easily retained by humans in memory.
This protocol can be used to communicate between two persons where there is some way to represent two distinct states (expressed as '1' and '0') to send the five-bit characters.
www.geocities.com /gwest39/fcp.html   (3208 words)

  
 PRESS RELEASE JCB and MasterCard Agree to Share Common Contactless Communications Protocol   (Site not responding. Last check: 2007-11-05)
Visa International made an announcement to support the protocol in March 2005, and JCB`s adoption of the specification means that these major international card brands will be basing their contactless payment applications on the same communications protocol.
While contactless payment applications vary by brand, the common specification for communications protocol will allow POS terminal vendors to reduce the burden of system development, as well as reducing initial costs and lead time for most financial institutions and merchants because they do not have to purchase multiple POS terminals to support contactless card products.
The common communication protocol ensures global interoperability for contactless payment products and as a result it is anticipated that the pace of deployment of contactless terminals will accelerate.
www.marketwire.com /mw/release_html_b1?release_id=113166   (464 words)

  
 Protocol Communications, Inc.
Protocol Communications provides standards based Structured Cabling, which increases the long-term value and consistency of the installed systems.
Protocol Communications is a veteran of repairing and replacing systems that others have botched.
Protocol Communications, Inc. 819 Montclair Court Milford, OH 45150 (513)248-9255 (800)910-5267
www.protocol.cc   (262 words)

  
 Communications Protocol - McShane, Inc.
A communications protocol defines the way you encode commands and data for transmission and reception.
The protocol we use for our standard temperature controllers is unique to our controllers, and our custom built temperature controllers will sometimes be assigned new, custom protocols based on the requirements of the application.
Since the reply does not contain the device address, the checksum in the reply is based only on the characters that represent the command and the value.
www.mcshaneinc.com /html/Library_CommProtocol.html   (959 words)

  
 LabeLase Producer - Host Communications
This protocol is the standard communications protocol for the Siemens family of Programmable Logic Controllers (PLC).
This protocol is the standard communications protocol for the Allen Bradley (Rockwell Automation) family of Programmable Logic Controllers (PLC).
This protocol is the standard communications protocol for the General Electric family of Programmable Logic Controllers (PLC).
www.infosight.com /labelaseproducer/hostcomm.htm   (4282 words)

  
 GL Communications - Protocol Analysis
GL's ATM Analyzer is used to analyze and view ATM protocols across the U-plane for both NNI and UNI interface.
The real-time mode of operation is used to capture stream of HDLC frames on the selected even or odd frames of the E1 multiframe on timeslot 0.
A variety of protocol analysis tools are provided for analysis of CAS protocols.
www.gl.com /protocol_analysis.html   (1255 words)

  
 CoCo Communications : Protocol   (Site not responding. Last check: 2007-11-05)
The CoCo protocol is a patent-pending cryptographic mesh protocol that solves many of the problems currently plaguing the communications industry.
Protocol technology limitations have traditionally been addressed at the operating system or application level.
The CoCo protocol addresses this interdependency problem by protecting both the data and the network from attack -- in addition to scaling globally.
www.cococorp.com /pages/protocol.html   (184 words)

  
 Communications Protocol offers accurate event reporting., Gamewell Co., The
Protocol enables loop distances up to 12,000 ft of twisted pair, parallel pair, THHN, and shielded wire types.
The new protocol reduces panel end-to-end response to less than five seconds and supports 198 devices per loop (99 detectors and 99 modules).
The protocol also enables longer loop distances —up to 12,000 feet of twisted pair, parallel pair, THHN and shielded wire types.
news.thomasnet.com /fullstory/461779   (951 words)

  
 WebRoom: InterMUD Communications Protocol with Extensions to VRMLize Multiuser Domains
On the other hand, interactive Internet communication applications such as the MUD (Multiuser Domain/Dimension/Dungeon) provide a ready mechanism for stateful real-time communications in which the powerful hyperlinking concept of the WWW can be incorporated.
We describe an implementation of this extended protocol using a prototype Web-browser MUD client incorporating the interactive characteristics of a MUD session with seamless MUD-to-MUD navigation, WWW document hyperlinking, and VRML 3-D rendering of MUD rooms.
With VRML support in the IMC protocol, it is now possible for a person on the Internet to navigate from MUD room to MUD room, interacting with other people in the same room through a VRML world.
www.isoc.org /inet97/proceedings/A6/A6_2.HTM   (1971 words)

  
 User-Defined Communications
A queue is used by the user-defined communications support to inform an application program of some action to perform or of an activity that is complete.
Contrast this with Figure 1-3 which shows how much more of the protocol is defined by the user-defined communications application than by the APPC application.
Because user-defined communications does not allow applications to define the data link and physical layers, the entire token-ring or Ethernet frame is not available to your applications.
www.redbooks.ibm.com /pubs/html/as400/v4r5/ic2924/info/apis/comm1.htm   (1729 words)

  
 XON/XOFF Communications Protocol Not Supported in QuickBasic
The XON/XOFF handshaking protocol of the ASC option of the OPEN COM statement is not implemented in any version of QuickBasic (including versions 2.00, 2.01, 3.00, 4.00, 4.00b, and 4.50), in Microsoft Basic Compiler version 6.00 or 6.00b for MS-DOS, or in Microsoft Basic Professional Development System (PDS) version 7.00 or 7.10 for MS-DOS.
During communications, the ASC option expands tabs to spaces, forces carriage returns at the end-of-line, treats CTRL+Z (ASCII value 26) as the end-of-file flag, and transmits CTRL+Z when you CLOSE the communications channel.
This behavior occurs because the XON/XOFF handshaking protocol of the ASC option of the OPEN COM statement is not implemented.
support.microsoft.com /kb/22019   (435 words)

  
 CCSDS Proximity-1 Communications Protocol Enables High-Speed Communication at Mars | Mars Today - Your Daily Source of ...
Proximity-1, a communications protocol developed by the international Consultative Committee for Space Data Systems (CCSDS), was instrumental in the success of a recent first-ever demonstration of in-orbit communication between NASA's Mars Exploration Rover (MER) Spirit and European Space Agency (ESA) Mars Express (MEX) orbiter.
Proximity-1 is a short haul delivery protocol designed to establish a two-way communications link between a lander and an orbiter, negotiate data rate and communications mode, and reliably deliver data during short orbiter-to-surface contacts. 
Proximity-1, CCSDS' most recent success, is the first space communications protocol to reliably operate in the proximate environment between a Mars bound asset and an orbiter.
www.marstoday.com /viewpr.html?pid=14149   (630 words)

  
 [No title]
Another is the time-honored tradition of blocking unauthorized clients from using your protocols, and then keep changing the blocking techniques as each one is worked around by the intruding client's own developers.
But the communications protocol could be opened up and documented, maybe even with a supported official API.
That would be a hit with trendsetting übergeeks, and eBay has a history of supporting outside developers, though it could cut into ad revenue.
arstechnica.com /news.ars/post/20060714-7266.html   (451 words)

  
 EETimes.com - Enea's Inter Process Communications protocol now open source
On the agenda for discussion is a proposal by Wind River to standardize on the already existing Transparent IPC (TIPC) protocol, first developed by Ericsson for distributed applications in the telecommunications and networking environment.
However, the transport protocols part of LINX is linked with the Linux kernel (as a kernel module) and therefore is licensed under the GPL.
A key element in the new LINX open source protocol is the use of a unique address mapping model, in which the IPC nodes store only the addresses needed for local connections, and as a result require minimal memory for code/data storage, allowing easier on-the-fly reconfiguration.
www.eetimes.com /showArticle.jhtml?articleID=183700339   (1145 words)

  
 [No title]
A traditional manager Barnes Informational [Page 4] RFC 4097 MIDCOM Protocol Evaluation June 2005 is an entity capable of generating requests and receiving notifications, and a traditional agent is an entity capable of responding to requests and generating notifications.
Design Barnes Informational [Page 8] RFC 4097 MIDCOM Protocol Evaluation June 2005 requirements for the protocol include robustness in the face of bursty message loads and server failures, resistance to specific DOS attacks and protection of message contents, and extensibility including support for vendor-specific attributes and message types.
Barnes Informational [Page 38] RFC 4097 MIDCOM Protocol Evaluation June 2005 (2) When the policy rule is being modified by a new agent (i.e., not the one that created the policy) the Middlebox makes a policy decision and decides whether to accept the requested modification or not.
www.ietf.org /rfc/rfc4097.txt   (11787 words)

  
 New High-Speed Infrared Communications Protocol Developed   (Site not responding. Last check: 2007-11-05)
Incorporating IrSimple in digital consumer electronics devices and home appliances is expected to lead to a significant expansion in applications for this new communications protocol.
For example, high-resolution photographs taken with a mobile phone or digital camera can be instantly transferred to a flat-panel TV or printer through a simple operation, similar to that of using a remote control unit.
Also the IrDA 115K protocol uses the SIR (Serial Infrared) specification for the speed of the physical layer (up to 115.2 kbps), which is currently incorporated in many mobile phones.
www.cdrinfo.com /Sections/News/Details.aspx?NewsId=14844   (403 words)

  
 Microsoft Debugs Communications Protocol - Technology News by TechWeb
Microsoft said it has released a series of fixes and is preparing others for an encryption flaw in its implementation of a communications protocol used in virtual private networks.
Last week, a computer security expert announced he had found a flaw in Microsoft's implementation of the protocol he said would lead to compromised passwords, the disclosure of private information, and server breakdowns in virtual private networks running under NT and Win 95.
Microsoft will also strengthen encryption keys by changing the key every 256 packets and use separate keys for communications to and from the server.
www.techweb.com /wire/story/TWB19980602S0010   (278 words)

  
 Messaging vendors rally around SIMPLE protocol
An emerging communications protocol called SIMPLE is the front-runner to become the standard method for sharing online presence information and instant messages across the Internet, thanks to backing from market leaders AOL Time Warner and Microsoft.
SIMPLE is based on the Session Initiation Protocol, a signaling protocol used to establish Internet telephone calls, multimedia conferences, chat sessions and interactive communications.
Members of the SIMPLE working group hope to finalize the protocol this fall and submit it to the IETF leadership for approval as a standards-track document before year's end.
www.networkworld.com /archive/2001/123534_08-06-2001.html   (1033 words)

  
 MPS1000 Multi-Protocol WAN-over-IP Communications Server
The MPS1000 is a WAN/LAN communications server that attaches to your local area network to provide wide area connectivity.
A single MPS1000 communication server can support a number of WAN protocols, each of which can be accessed simultaneously by multiple clients.
The MPS1000 is designed as a fully programmable communications system capable of sustaining high data rates for a variety of protocols used in synchronous communications.
www.pt.com /products/prod_mps1000.html   (726 words)

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