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Topic: Duplex operation

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	Duplex Operation
		Half duplex refers to such transmission, but in a time-shared mode-only one direction can transmit at a time.
		To learn more about Duplex Operation, you can submit us a web request, or call Timbercon today, 1-800-221-6992, to get in contact with our experienced sales engineers.
		To learn about Duplex Operation for your custom application, you can submit us a quick quote, or call Timbercon today, 1-800-221-6992, to get in contact with our experienced sales engineers.
	www.timbercon.com /Duplex-Operation.html (232 words)

	The TCP/IP Guide - Simplex, Full-Duplex and Half-Duplex Operation
		Simplex operation is also used in special types of technologies, especially ones that are asymmetric.
		Technologies that employ half-duplex operation are capable of sending information in both directions between two nodes, but only one direction or the other can be utilized at a time.
		In full-duplex operation, a connection between two devices is capable of sending data in both directions simultaneously.
	www.tcpipguide.com /free/t_SimplexFullDuplexandHalfDuplexOperation.htm (661 words)

	Duplex - Wikipedia, the free encyclopedia
		A duplex locomotive is a type of steam locomotive.
		A duplex lamp is a type of oil lamp invented by Joseph Hinks.
		A Duplex (building) is the U.S. name for a type of housing.
	en.wikipedia.org /wiki/Duplex (115 words)

	Duplex operation in a reproduction machine - Patent 4313673
		Simplex to duplex copying, is simplified in particular, the requirements are to reverse order the documents for a first pass, place all the documents in a recirculating document handler, move half copies or one sided copies to an auxiliary feed tray, and finally reverse the order of the originals.
		It would therefore be desirable to provide a duplex capability in a reproduction machine that does not unnecessarily add to the complexity and cost of the control and the copy sheet handling apparatus and yet greatly simplifies the complexity and difficulty of operator intervention.
		In particular, in simplex to duplex copying, the operator is only required to reverse order the documents for the first pass, place all the originals in the recirculating document handler, move half copies or one sided copies to an auxiliary feed tray, and finally reverse the order of the originals.
	www.freepatentsonline.com /4313673.html (5771 words)

	Half-duplex or full-duplex automode operation for use in data communications equipment - Patent 5349635
		The method of claim 1 wherein the full-duplex mode is a V.32 mode of operation and the first frequency is 2100 Hz, and the half-duplex mode is a 208B mode of operation and the second frequency is 2021 Hz.
		The method of claim 3 wherein the full-duplex mode is a V.32 mode of operation and the first narrow frequency band includes 2100 Hz, and the half-duplex mode is a 208B mode of operation and the second narrow frequency band includes 2021 Hz.
		However, the particular mode of operation of this modem is determined by the adjustment of a hardware swap.
	www.freepatentsonline.com /5349635.html (4611 words)

	PCI 10/100Base-TX and 100Base-FX/9000
		While the details of full-duplex operation are not currently defined by IEEE 802.3u-1995 (full-duplex mode essentially involves "turning off" the CSMA/CD access method which is the foundation of IEEE 802.3), the autonegotiation mechanism defined in IEEE 802.3u-1995 allows devices to advertise and configure themselves to operate in a full-duplex mode which is essentially vendor-specific.
		With this method you may set both the speed and duplex mode of the interface, and have this setting be in effect across subsequent system reboots.
		Operation of this equipment in a residential area is likely to cause interference, in which case the user at his own expense will be required to take whatever measures may be required to correct the interference.
	docs.hp.com /en/5187-2774/apds02.html (3151 words)

	Cisco - Troubleshooting Cisco Catalyst Switches to NIC Compatibility Issues
		Duplex mismatch is a situation in which the switch is operating at full-duplex and the connected device is operating at half-duplex, or the other way around.
		These are the result of collisions at half-duplex, duplex mismatch, bad hardware (NIC, cable, or port), or a connected device generating frames that do not end with on an octet and have a bad FCS.
		This is an indication of overutilization of the switch port at half-duplex or duplex mismatch.
	www.cisco.com /warp/public/473/46.html (6809 words)

	Ethernet Technical Summary - Chapter 4
		To support full-duplex mode, both the NIC and the hub must be capable of, and be configured for, full-duplex operation.
		Duplex "SC" connectors are recommended, but "ST" and FDDI "MIC" connectors are also permitted.
		The short wavelength lasers specified by the standard operate in the wavelength range of 770 to 860 nanometers.
	www.stormpages.com /webexpert/LAN/Chapter4.htm (6523 words)

	AICS Research, Inc., University Park, NM 88003
		MOTIVATION FOR THE OPTION Telnet is a protocol that may be operated in either a peer-to-peer, fully symmetric mode, or asymmetrically, in a host-terminal mode.
		Passwords, whose presence would ordinarily be suppressed by a host computer when operating in a full-duplex mode, are made visible in half-duplex.
		Full-duplex communication requires a round-trip circuit for each packet sent from the client NVT terminal to the host computer and back again before those characters are displayed on the terminal's screen, thus perceived transit times that are many times that of half-duplex communications.
	www.aics-research.com /qcterm/telnet.html (1435 words)

	Full Duplex Ethernet (Site not responding. Last check: )
		In full duplex operation, both partners in the conversation can transmit at the same time without scrambling one another's signals.
		This is the essence of half duplex operation.
		Full duplex NICs are also used in the emerging Ethernet 802.3 1000Base-T standard for gigabit Ethernet.
	cwx.prenhall.com /bookbind/pubbooks/panko/chapter5/medialib/C5FULL.HTM (274 words)

	icom - Program to Control ICOM Receivers and Transceivers
		Ordinarily, FM repeater operations require that the station receiving on a frequency transmit at a fixed offset relative to that frequency.
		When using this program to operate more than one radio that covers the same frequency bands and modes, it may be useful to use a standard set of files, which could be loaded into any of the radios directly from the file.
		The trace operates from received octets, either a readback of a transmitted frame preceded by "T:" or a copy of a received frame preceded by "R:".
	www.ece.udel.edu /~mills/icom (3210 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.
		The operating system is not aware of, nor does it control whether or not the network adapter is operating in the full duplex mode of operation, how well it is operating in this mode operation.
		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)

	lan_config(8)
		Autonegotiation is a hardware and software (driver) process that allows determination of the highest common speed and duplex (half or full) configuration.
		If the remote interface advertises that it is capable of 10 Mb/s, full-duplex operation only, the link is established at 10 Mb/s, full-duplex.
		To switch from aui or bnc to utp full-duplex operation on tu0, enter: lan_config -i tu0 -m utp -x 1 2.
	h30097.www3.hp.com /docs/base_doc/DOCUMENTATION/V40E_HTML/MAN/MAN8/0162____.HTM (531 words)

	hard-coding full-duplex
		duplexity, the "safest" route is to assume half-duplex operation.
		> duplexity, the "safest" route is to assume half-duplex operation.
		> > duplexity, the "safest" route is to assume half-duplex operation.
	forumz.tomshardware.com /network/hard-coding-full-duplex-ftopict19569.html (2141 words)

	MuLogic UDM-288 Voiceband modem (Site not responding. Last check: )
		During dial-up line operation the UDM-288.3 continuously tests the leased line by means of an interactive V.19 type of data exchange.
		The restoral operation of the UDM-288.3 can be enabled under control of a real-time clock in order to prevent unnecessary telephone connection costs at times when the modem connection is not in use.
		Simulated switched carrier operation is supported for applications where the DTE requires a half-duplex V.24 control.
	www.mulogic.com /udm-288.html (1863 words)

	Auto-Detecting Full Duplex Operation
		Many modern-day network cards have the ability to auto-detect full duplex operation.
		Many NIC have known problems with detecting the correct operation mode in small half duplex environments.
		Clues that you have a NIC which is incorrectly set for full duplex operation is a network which experiences a high collision rate.
	www.ists.dartmouth.edu /classroom/crs/duplex_detect.php (122 words)

	[No title] (Site not responding. Last check: )
		FIGURE 1 depicts the operation of a duplexer, which provides a minimum amount of insertion loss in the desired pass band, a sufficient amount of isolation between the Tx and Rx signals, and a sufficient amount of attenuation outside the desired frequency band.
		Alternatively, one of the antennas may be disposed in an antenna casing such as a conventional whip antenna while the other is attachable to the communications apparatus housing.
		Thus, in accordance with the structure of the present invention, the conventional duplexer can be eliminated in favor of less space consuming and less expensive isolation circuitry coupled between independent transmitting and receiving antennas.
	www.wipo.int /cgi-pct/guest/getbykey5?KEY=98/48475.990325&ELEMENT_SET=DECL (1451 words)

	Modify Port
		Port automatically selects the network speed (100Mbps or 10Mbps) and the data transfer operation (full- or half-duplex) between itself and the device to which it is connected.
		Port operates at 100 Mbps and negotiates with the port at the other end for other port operation features.
		Port operates at 1000 Mbps and negotiates with the port at the other end for other port operation features.
	www.hp.com /rnd/device_help/help/hpwnd/webhelp/HPJ4865A/configuration_portsmodify.htm (275 words)

	Leased line modem for industrial applications LLM-336
		The modem supports full and half duplex operation modes and can be used on point-to-point and multipoint lines.
		For multipoint operation on unconditioned copper cable, the transmitter impedance is controlled and the receiver can be switched to high impedance.
		Half duplex operation is supported for asynchronous and synchronous data.
	www.mulogic.com /llm-336.html (723 words)

	Ethernet Protocol: Switches and Full Duplex Operation (Site not responding. Last check: )
		For this to work both the node and the hub must be configured for full-duplex operation.
		Since full-duplex operation is possible using 10BaseT, Ethernet Switches can carry data in both directions simultaneously, which doubles the normal transmission rate of 10Mbs to 20Mbs.
		Since data is sent over one link when it enters the switch (as opposes to being broadcast), there is no possibility of a collision.
	www.dcs.gla.ac.uk /~toddm/nct4/ethernet_at_10mbps/switches_fdo.html (190 words)

	Duplex operation of BayNetworks FA310tx cards (Site not responding. Last check: )
		I recommend that you do not force full duplex, unless You have a non-MII 21140 card that cannot autonegotiate (older designs) or You must connect to old equipment that does not autonegotiate.
		When you do force the duplex, make certain that the machine is never moved to repeater, because that resulting out-of-window collisions will usually stop the transmitters on most attached machines.
		It will not be turned on if you just force full duplex and let the driver autosense the speed, if the media table is the generic Digital example, or if it's a MII transceiver (there is no media table entry for setting the general purpose pins for MII media).
	www.beowulf.org /pipermail/test/1998-September/002286.html (521 words)

	STMicroelectronics \| STE100P - SINGLE PORT FAST ETHERNET PHY / TRANSCEIVER - STE100P (Site not responding. Last check: )
		In the 100Base-TX remote loop-back operation, the data is received from rxp/rxn pins through receive path to the output of data and clock recover and then loop-back to the input of NRZI to MLT3 converter of transmit path then transmit out to the medium via the transmit line drivers.
		In the 10Base-T loop-back operation, the data is through transmit path and loop-back from the output of the Manchester encoder into the input of Phase Lock Loop circuit of receive path.
		Under half duplex mode, collision signal is asserted when transmit and receive signals collided and carrier sense asserted during transmission and reception.
	www.st.com /stonline/books/ascii/docs/6806.htm (5461 words)

	Telecom Dictionary H: Phone Service Definitions
		In computer and communications systems operations, pertaining to a power-saving condition or status of operation of equipment that is ready for use but not in use.
		Pertaining to a dormant operating condition or state of a system or equipment that permits complete resumption of operation in a stable state within a short time.
		In telephony, pertaining to the operation of a selector or other similar device to find and establish a connection with an idle circuit of a chosen group.
	www.faxswitch.com /Definitions/telecom_dictionary_h.html (8310 words)

	CSM Communications
		Two changes in spacecraft VHF equipment would be needed: a dual-channel in place of a single-channel receiver, and a diplexer for use during duplex operation.
		MSC Flight Operations Division outlined the advantages inherent in the CSM's capability to use the HF transceiver during earth orbit.
		Report on modifications for lunar distance operating range for the Apollo CSM high-gain antenna Dalmo-Victor submitted to MSC a report on modifications necessary to extend to lunar distances the operating range of the CSM's high-gain antenna.
	www.astronautix.com /craft/csmtions.htm (2529 words)

	Troubleshooting Ethernet
		For half-duplex operation, the mode on which traditional Ethernet is based, the size of your collision domain can be limited by the physical limitations of the cabling utilized.
		Because the 64-byte slot time is consistent for 10/100/1000 transmission speeds, this severely limits the scalability for 1000BaseX to operate in a network with a diameter of more than 20 meters.
		Now, having said all that regarding the regular operation of traditional Ethernet and 802.3, we must discuss where the two separate in features and functionality.
	www.cisco.com /univercd/cc/td/doc/cisintwk/itg_v1/tr1904.htm (4136 words)

	Foundry Networks : Services : FAQs : What is Ethernet Auto-Negotiation? (Site not responding. Last check: )
		Previously, all Ethernet communication was in a half-duplex CSMA-CD mode of operation.
		With full-duplex operation each point-to-point connection is a separate 10/100/1000 Mbps Ethernet segment.
		Auto-negotiation is a mechanism that enables devices to negotiate the SPEED and MODE (duplex or half-duplex) of an Ethernet Link.
	www.foundrynet.com /services/faqs/ethernetAutoNegotiation.html (395 words)

	[No title]
		duplex operation and can enable or disable flow control.
		Support is provided for LED connections to indicate Link, Activity, Collision, Full Duplex, 10Mbps, or 100Mbps transmission status.
		The RTL8305SB includes a 4B/5B encoder/decoder, a Manchester encoder/decoder, a scrambler/descrambler, a transmit output driver, output waveshaping circuitry, an on-chip filter, a
	www.incomtek.com /product/networks/switch/RTL8305SB.html (437 words)

	RS-485 Data Interface Gives Isolated, Full-Duplex Operation - Maxim/Dallas
		RS-485, rs485, full duplex, isolated, isolation, isolated circuits, isolated lines, 250kbaud, 2.5Mbaud, 250 kilobaud, 2.5 megabaud, bi-directional, 1600V isolation, 2000V isolation, transformer coupled, opto coupled, optocouplers, internal isolated
		Abstract: A circuit is described that provides fully isolated RS-485 full-duplex data communication with only two integrated circuits (ICs).
		The optocouplers transmit digital signals across the internal isolation barrier, and the center-tapped transformer transmits power across the barrier from its logic (non-isolated) side to its isolated side.
	www.maxim-ic.com /appnotes.cfm/appnote_number/2116 (425 words)

	Documentation
		Use this command to configure the speed and duplex mode of a given interface when auto-negotiation is disabled.
		To force operation to the speed and duplex mode specified in a speed-duplex command, use the no negotiation command to disable auto-negotiation on the selected interface.
		To force operation to the specified flowcontrol mode (i.e., on or off), use the no negotiation command to disable auto-negotiation on the selected interface.
	support.dell.com /support/edocs/network/pc5212/CLIG/interfac.htm (1183 words)

	200 Mbps PHY/MAC apparatus and method - US Patent 6169729
		COL 242 is asserted by the Physical layer device 220 upon detection of a collision on the medium, and remains asserted while the collision condition persists.
		Since full duplex does not share the signal channel with multiple stations, there is no need to adhere to the original Ethernet medium access control system.
		At full duplex, one pair of the UTP wiring within each pair of UTP category 5 cables 740, 750 provides a path for transmitting data, while the second of the pair 740, 750 provides a path for receiving data.
	www.patentstorm.us /patents/6169729.html (8458 words)

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