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Topic: Full duplex

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full duplex

Time division duplex

duplex operation

Duplex locomotive

half duplex operation

duplex transmission

Duplex Communication

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	Full Duplex (Site not responding. Last check: 2007-10-13)
		Full Duplex FDDI operations allow simultaneous transmission and reception of data frames at a rate of 100 Mb/s between two FDDI nodes.
		The concept of full duplex, as it relates to Local Area Networks (LANS), is simple; modify an existing physical layer transport to transmit and receive data at the same time.
		The selection of full duplex mode means both the A and B port are selected for full duplex but only one, either A or B port are used for the live connection.
	www.enterasys.com /support/techtips/an0156-9.html (317 words)

	Full Duplex Support with Windows NT
		The term "full duplex" has been used to describe two separate functions, one related to communication between the network adapter miniport driver and the operating system, and the other being the operation of the network adapter itself.
		NDIS version 4.0 introduced a feature that was also called "full duplex" but was used in a somewhat different context than the same term when used to describe network adapter operation at the media access control layer.
		Because of the full duplex naming convention, many people have assumed that the NDIS full duplex feature was tied to supporting adapters that operate in the full duplex mode at the media access control layer, and as stated above, this is not the case.
	support.microsoft.com /kb/217305 (776 words)

	Switches - What is Full Duplex?
		Full duplex is a point-to-point, collision-free Ethernet* connection over twisted pair or fiber cabling.
		Full duplex is primarily useful to extend the distance of an Ethernet where the limitation on length is due to propagation delay, not attenuation.
		Full duplex removes the restriction on length due to propagation delay, since a collision cannot occur in full duplex.
	support.intel.com /support/express/switches/sb/CS-014409.htm (406 words)

	Manual Speed and Duplex Mode Configuration
		Sometimes you may need to manually set the duplex mode of the card—for example, if the switch is operating at full-duplex but does not autonegotiate.
		Ensure that the speed, duplex mode, and autonegotiation of the associated switch are configured the same as on the PCI 10/100Base-TX card.
		To manually set the duplex mode of the PCI card, first ensure that your computer has the latest applicable patches installed as listed in the Required and Optional Patches section of this release note.
	docs.hp.com /en/J4254-90003/ch01s03.html (654 words)

	Cisco - Configuring and Troubleshooting Ethernet 10/100/1000Mb Half/Full Duplex Auto-Negotiation
		View the duplex status of port 1/1 on switch B. The show port 1/1 command on switch B indicates that the port operates at half-duplex and 10 Mb.
		Another indication of a duplex mismatch is the rapid increase of FCS and alignment errors on the half-duplex side, and runts on the full-duplex port.
		Duplex is subservient to speed in the sense that if speed is set to auto, then the duplex cannot be manually set.
	www.cisco.com /warp/public/473/3.html (4654 words)

	Duplex (telecommunications) - Wikipedia, the free encyclopedia
		Duplex systems are employed in nearly all communications networks, either to allow for a communication "two-way street" between two connected parties or to provide a "reverse path" for the monitoring and remote adjustment of equipment in the field.
		Time division duplex has a strong advantage in the case where the asymmetry of the uplink and downlink data speed is variable.
		Frequency division duplex (FDD) is the application of frequency-division multiplexing to separate outward and return signals.
	en.wikipedia.org /wiki/Duplex_(telecommunications) (665 words)

	www.HelloDirect.com - The Difference Between Half and Full Duplex Explained (Site not responding. Last check: 2007-10-13)
		"Duplex" simply means you're able to send and receive data (most often the human voice) from the same device whether that be with your phone, 2-way radio, or PC.
		Conventional speakerphones must shut the speaker off when the mic is activated so as not to pick up your caller's voice and transmit it along with yours causing an echo effect.
		While it doesn't quite deliver the same sound quality as full duplex, the special digital circuitry does help reduce the echo and dropout effects.
	telecom.hellodirect.com /docs/Tutorials/DuplexExplained.1.080801-P.asp (546 words)

	Intel® Express 500 Series Switches - Half-Duplex and Full-Duplex
		This means that at half duplex, Ethernet throughput is limited by the need to retransmit data when collisions occur.
		Auto duplex negotiates whether the attached device is transmitting in half or full-duplex, and then automatically changes that port to that mode.
		Normally you would need to configure the port on the switch with a specific speed or duplex mode, but that is not required with auto-negotiation?it detects the capabilities of the other devices (over a common link) and configures itself to use the same technology automatically; this gives maximum efficiency.
	support.intel.com /support/express/switches/500/sb/cs-012076.htm (624 words)

	baudline solution - full duplex DAQ comparison
		Test, measure, and characterize the full duplex performance of various data acquisition hardware and software drivers.
		Most full duplex devices have a zero PPM loop error which signifies that their ADC and DAC clocks are in lockstep.
		This is a full duplex test that uses a loopback of the tone generator to measure the various SNR, THD, SINAD, ENOB, and SFDR metrics.
	www.baudline.com /solutions/full_duplex (731 words)

	Full Duplex Transmission
		Full Duplex transmission indicates the transmission of data in two directions simultaneously.
		For example, on a local area network with full-duplex transmission, one workstation can be sending data on the line while another workstation is receiving data.
		On the other hand, a half duplex transmission indicates that data transmission happens only in one direction at a time.
	www.networkdictionary.com /hardware/fdt.php (264 words)

	Full-duplex Vs Half-duplex - Techzonez
		After reading advise from http://www.dslnuts.com/, I have set my NIC to 100mbps full duplex.
		This is in connection with getting the full bandwidth of my internet connection using the Cablenut program.
		So basically when applying this to networking half only lets you send and recieve separately while full lets it occur simultaneously.
	www.techzonez.com /forums/showthread.php?t=3589 (706 words)

	Duplex Mode
		If your switch supports NWay* standard and both the adapter and switch are set to auto-negotiate, full duplex is automatic and no action is required on your part.
		In this situation, the Negotiable Speeds and Duplexes checkboxes are disabled, since these are set to advertise speeds during auto-negotiation.
		To ensure that link is established correctly, auto-negotiation must be disabled on the link partner, and the link should be forced to the same speed and duplex mode used on the adapter.
	www.wband.com /tech/UserGuide/duplex_g.htm (687 words)

	7020 full duplex how ? - Sat Industry Forums
		The reason i want to set the dreambox to full (even though now i get smaller speed in PC @ full) is that i suspect that its in half mode...
		When one end believes the link is half duplex, the other thinks it is full duplex, there are lots of collisions.
		But forcing the half duplex end to full duplex will of course be even better, so always try that first (unless it is impossible, e.g.
	sat-industry.net /forums/showthread.php?p=173574#post173574 (754 words)

	Duplex mismatch - Wikipedia, the free encyclopedia
		This, in turn, will quiesce the new traffic over the connection, leaving only the retransmissions and acknowledgements.
		This will restart the TCP traffic, which in turn immediately causes lost packets as streaming resumes.
		Symptoms of a duplex mismatch are connections that seem to work fine with a ping command, but "lock up" easily with very low throughput on data transfers; the effective data transfer rate is likely to be asymmetrical, performing much worse in one direction than the other.
	en.wikipedia.org /wiki/Duplex_mismatch (836 words)

	LMDS Full Duplex 100Mbps
		ELVA's Full Duplex LMDS equipment set based on an idea of local wireless access points for those LMDS subscribers who need high-speed return link.
		For a duplex client station there are receiver and transmitter with separate dishes within the client equipment kit.
		In ELVA's Full Duplex LMDS equipment set an each local wireless access point has receiver base station, which receives upstream IP from client transmitters.
	www.elva-1.com /products/telecom/Full-duplex-LMDS.html (907 words)

	Annoyances.org - re: SoundBlaster - Full Duplex (Windows 98 Discussion Forum)
		This option is only available if you have a full duplex card.
		MediaRing Talk automatically detects the duplex mode of your sound card as well as the other party?s sound card and switches to half duplex mode if any one party is using a half-duplex sound card.
		This indicates that at least some software automatically runs your SB at full duplex if it's capable of full duplex.
	www.annoyances.org /exec/forum/win98/1022530599 (181 words)

	Full/Half Duplex
		of what half/full duplex is, I know what it is. The info I have got from the manufacturer sez I have a full duplex sound card, I cant find out how to verify this, or if I want to, change any options.
		To answer your question, the half/full duplex is probably done with a Hays MODEM string.
		One does not usually fool with the full/half setting, or at least in recent years (or since about the time of 2400 bps MODEMs) I have not found it to be necessary.
	www.duxcw.com /dcforum/DCForumID1/358.html (691 words)

	IRLP - Internet Radio Linking Project
		This is because they are either running on a simplex frequency or accessing a repeater through a half duplex radio.
		Some systems are capable of running full-duplex, but there are a few software and hardware limitations which do not allow the system to run full duplex in its current configuration.
		Speak Freely has the ability to run full-duplex, and the IRLP interface board was designed with full duplex operation in mind.
	www.irlp.net /full-duplex.html (186 words)

	Community Support : full duplex on sony erricson phones ...
		If full duplex audio is supported then I need to use the same AMR API or is there any better API,s available.
		I would like to know on which sony erricsson phones can we have full duplex.
		And if full duplex is possible on any phones then I would like to know which API,s to use.
	developer.sonyericsson.com /message.jspa?messageID=73030 (154 words)

	I need full-duplex - The macosxhints Forums
		This has nothing to do with whether the media connection in in FULL or HALF duplex mode.
		I scanned apples developer pages for duplex problems but have not found a mention of what the arguments are to ifconfig that control duplex.
		Now with 9 there is a system extension that will hard code the machine to 100 full or 10 half.
	forums.macosxhints.com /showthread.php?t=857 (627 words)

	TANDEM-COM WIRELSS INTERCOM - WIRELESS FULL DUPLEX INTERCOM
		Finally a Full Duplex Wireless intercom system that comes complete with Ultra headsets, rechargeable batteries and a charger.
		This revolutionary intercom is not voice activated, there are no buttons to push and two people can talk simultaneously exactly the same as on a hard wired unit.
		This full duplex format allows partners to talk simultaneously without pushing buttons.
	www.precisiontandems.com /tandemcomwireless.htm (200 words)

	Part14: Simplex, Half and Full Duplex
		There is no need to switch from transmit to receive mode like in half duplex.
		Of course, in the world of data communications, full duplex allows both way communication simultaneously.
		An example can be a consumer which uses a cable connection to not only receive TV channels, but also the same cable to support their phone and Internet surfing.
	physinfo.ulb.ac.be /cit_courseware/datacomm/dc_014.htm (468 words)

	1.3.x and full duplex record - Audacity Forum (Site not responding. Last check: 2007-10-13)
		But, full duplex requires the same number of channels.
		Portaudio thus has no way to set the stream up in duplex (it is OK on other platforms), whatever audacity asks for.
		I have devised a patch for alsa to enable the OSS ioctl to set separate capture and play nos channels, but the devel's don't seem very keen to incorporate it.
	audacityteam.org /forum/1388 (1349 words)

	macosxhints.com - Enable full duplex ethernet in 10.2
		My Ethernet switch also believes the PBG4 is full duplex, and there is no mismatch as I'm easily getting 5 MBytes/s out of the thing (haven't run ttcp though).
		It appears that the NIC is set to full duplex, but when I do a file transfer test.
		As a baseline, I booted into OS 9 with Apple's duplexer tool and was able to transfer the same file in under a minute.
	www.macosxhints.com /article.php?story=20020902082941913 (1255 words)

	Full Duplex
		This full duplex mode keeps the actual Touch Screen active file (Touch.ini) as commands for the full duplex.
		Because of the user friendly interface of the Touch Screen software, you can customise your full duplex commands in a very easy way.
		Note that the touch screen software does not need to be loaded, if you want to activate any modifications on the touch screen, you will have to select Master, then Full Duplex again, to load the modified touch screen file in ProScenium.
	www.digimedia-mls.com /htmlhelp/html/hs70.htm (690 words)

	Key Colony Beach Florida Keys Vacation Rental Accommdation - Duplex
		This home overlooks a wide deep-water canal and is only a few minute boat ride to the ocean and is also has close access to the Gulf of Mexico.
		Each side of the duplex has a 30-foot seawall and wood stepdown dock and can accommodate up to a 28-foot boat.
		You will have full access to the CABANA CLUB, a private ocean front club featuring an Olympic-size pool, hot tub, a sandy white beach (with beach chairs) on the Atlantic ocean, bar, restaurant, and snacks.
	www.vrbo.com /30739 (533 words)

	ZDNet Australia: Blogs: Full Duplex
		Telstra's antics have certainly kept the readers of Full Duplex amused this year.
		Now this sort of thing would normally be more annoying than humorous -- if the mobile in question didn't belong to Telstra's own chief spin doctor -- group managing director, Public Policy and Communications, Phil Burgess.
		The table full of reporters clustered around Burgess at the back of the room watched as Burgess hurriedly tried to turn the phone off, its ring causing heads to turn as it echoed throughout the room.
	www.zdnet.com.au /blogs/fullduplex (978 words)

	Amazon.com: Enet Transceiver MMf Full/half Duplex 10bfl Sc Connector: Electronics (Site not responding. Last check: 2007-10-13)
		Because most Ethernet technologies are unable to recognize downlink faults, a failed link may appear normal to network management; requiring unnecessary troubleshooting.
		LinkAlert monitors all physical uplink and downlink failures and enables all faults to be detected by network management.The 10BASE-FL transceiver connects AUI male (DB-15) nodes to a fiber optic medium via a standard SC type connector in both full and half-duplex modes.
		The ability to operate in full-duplex mode allows for operation between switches, routers and servers using full-duplex Ethernet.
	www.amazon.com /Enet-Transceiver-Duplex-10bfl-Connector/dp/B000067T5W (429 words)

	Frequently asked Questions - Faq14 (Site not responding. Last check: 2007-10-13)
		However, if you have an original (8-bit) Soundblaster, Soundblaster-16, Soundblaster Pro, or other older card, they are 'half duplex' cards and you will have to upgrade.
		A full-duplex sound card is available in most computer stores for well under $100.
		Most Macintosh models have had full duplex sound, with the exception of the Performa line of 68k Macintoshes and certain models of the PowerPC 8100 series.
	www.scis.nova.edu /Info/Faqpages/PC_Requirements/duplex.html (162 words)

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