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Topic: Physical signaling sublayer

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	Physical layer -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-20)
		The physical layer is level one in the seven level (Click link for more info and facts about OSI model) OSI model of (Click link for more info and facts about computer networking) computer networking.
		The physical layer is the very simplest, defining only exactly what a bit is: in other words how to transmit a one or a zero.
		In a snail-mail network, that is a network made up of people posting letters to one another, the physical layer is all about how you write and read individual letters of the alphabet.
	www.absoluteastronomy.com /encyclopedia/p/ph/physical_layer.htm (495 words)

	ANSDIT - The letter "P" (Site not responding. Last check: 2007-10-20)
		In a local area network, that portion of the physical layer implemented by the functional circuitry of the medium attachment unit.
		In a local area network, that portion of the physical layer that interfaces with the medium access control sublayer and performs bit symbol encoding and transmission, bit symbol reception and decoding, and optional isolation functions.
		Return to zero recording in which the zeros are represented by signals in one sense and the ones are represented by signals in the opposite sense.
	www.ncits.org /tc_home/k5htm/p2.htm (2747 words)

	Station management circuit - Patent 5946462 (Site not responding. Last check: 2007-10-20)
		The PLS signals 105 provide for transmit data to be passed from the repeater unit 101 to the transceiver 102, receive data to be passed from the transceiver 102 to the repeater unit 101, and for carrier and collision signals to be passed to the repeater unit 101 by the transceiver 102.
		When the invalid.sub.-- pream signal is not asserted and the state machine is in the PREAMBLE state 402 and the mdio.sub.-- in is a logic 0 value and either the cnt.sub.-- 32 signal is asserted or the cnt.sub.-- 32.sub.-- flg signal is asserted, the state machine 321 transitions to the ST state 403.
		signal and the check.sub.-- op signal is asserted.
	www.freepatentsonline.com /5946462.html (10116 words)

	Physical layer - Wikipedia, the free encyclopedia
		The physical layer is level one in the seven level OSI model of computer networking.
		The physical layer is the most basic network layer, providing only the means of transmitting raw bits.
		An analogy of this layer in a physical mail network would be a specification for various kinds of paper and ink, for example.
	en.wikipedia.org /wiki/Physical_layer (268 words)

	Ethernet
		The physical layer for each transmission rate is divided into sublayers that are independent of the particular media type and sublayers that are specific to the media type or signal encoding.
		The signal transceivers that were included as part of the PMA function in the generic logical model of Figure 7-14 were redefined as the separate physical media-dependent (PMD) sublayers shown in Figure 7-16.
		Because the signal on each wire pair at the MDI is the sum of the transmitted signal and the received signal, each receiver subtracts the transmitted symbols from the signal received at the MDI to recover the symbols in the incoming data stream.
	www.cisco.com /univercd/cc/td/doc/cisintwk/ito_doc/ethernet.htm (10000 words)

	Signaling data link for a GSM-CDMA air interface - US Patent 6813256 (Site not responding. Last check: 2007-10-20)
		In the present case, the terms physical layer, data link layer, and radio interface layer are used throughout, merely for the sake of clarity.
		The acknowledged mode is invoked by the RR sublayer 56 by setting a predetermined flag in a message between the BSS 32 and the MS 40, substantially as specified by IS-95B.
		Messages waiting in queues 112 and 114 of adaptation sublayer 74 at the MS are held in their queues pending completion of the handover, although high-priority (ESAPI 1) messages relating to the handover are conveyed.
	www.patentstorm.us /patents/6813256.html (7984 words)

	New Page 4 (Site not responding. Last check: 2007-10-20)
		The reason for having a minimum size frame is to prevent a station from completing the transmission of a frame before the first bit has reached the far end of the cable, where it may collide with another frame.
		The GMII is the interface between the MAC layer and the Physical layer.
		This is the GMII sublayer which provides a uniform interface to the Reconciliation layer for all physical media.
	murray.newcastle.edu.au /users/students/2000/c9802345/new_page_4.htm (1147 words)

	ATM Overview - ATM Layers (Site not responding. Last check: 2007-10-20)
		The ATM physical medium sublayer is responsible for transmission of data over the physical medium, regardless of the type of medium used.
		The physical medium sublayer is responsible for receiving and transmitting bit streams in a continuous method.
		The transmission convergence sublayer is responsible for the transmission and reception of frames over framed transmission facility, such as T-3.
	www.tekelec.com /ss7/protocols/atm5.asp (425 words)

	Encyclopedia: Physical layer (Site not responding. Last check: 2007-10-20)
		A transmission medium is any material substance, such as fiber-optic cable, twisted-wire pair, coaxial cable, dielectric-slab waveguide, water, or air, that can be used for the propagation of signals, usually in the form of modulated radio, light, or acoustic waves, from one point to another.
		Source: from Federal Standard 1037C According to the IEEE 802 family of standards Media Access Control (MAC) is the lower sublayer of the OSI data link layer, the interface between a nodes Logical Link Control and the networks physical layer.
		A modem (a portmanteau word constructed from modulator and demodulator) is a device that modulates an analog carrier signal (sound) to encode digital information, and also demodulates such a carrier signal to decode the transmitted information.
	www.nationmaster.com /encyclopedia/Physical-layer (1161 words)

	[No title] (Site not responding. Last check: 2007-10-20)
		The MAU contains the electronics for transmitting and receiving the encoded physical signals which are superimposed on or filtered out from the LAN medium.
		Physical medium attachment (PMA) This is the part of the MAU which contains the functional circuit logic of the MAU.
		Medium-dependent interface (MDI) This is the physical (electrical/optical) and mechanical interface between the Ethernet medium and the MAU.
	mmlabwww.csie.nctu.edu.tw /ICP5134/2005/Ref/Physical_Layer.ppt (787 words)

	SuperStack II Switch 2700 Operation Guide
		The LLC sublayer and the MAC sublayer together are intended to function as the OSI model for the Data Link Layer in a broadcast network.
		The MAC sublayer attempts to acquire the medium and transfer a serial stream of bits to the Physical Signaling sublayer.
		Figure 3-3 schematically depicts the functions performed by the MAC sublayer and the flow of data between the LLC, MAC and PLS sublayers.
	support.3com.com /infodeli/tools/switches/s_stack2/2700/27oper/ch3.htm (3837 words)

	IEEE 802.9 ISLAN
		The functions corresponding to the OSI physical layer are accomplished by three sublayers in the 802.9 protocol model.
		This sublayer defines the specific signaling scheme, cable and connector characteristics, and electrical properties of the transmitter and receiver.
		The physical connector for 802.9 ISTEs and AUs is an 8-pin modular connector (specified in ISO standard 8877), commonly referred to as an RJ-45.
	www.garykessler.net /library/ieee8029.html (4261 words)

	Program4 Engineering: Automation & Information Glossary
		Confirmation signal that a signal or message (usually an alarm) was received.
		Physical connection between an interface processor or card and the data buses and the power distribution buses inside a chassis.
		Common physical signal path composed of wires or other media across which signals can be sent from one part of a computer to another.
	www.program4.com /pages/Gloss.shtml (8120 words)

	PHYSICAL LAYER FACTS AND INFORMATION (Site not responding. Last check: 2007-10-20)
		The physical layer is level one in the seven level OSI_model of computer networking.
		The shapes of the electrical_connectors, which frequencies to broadcast on, and similar low-level things are specified here.
		In a local_area_network (LAN) or a metropolitan_area_network (MAN) using open_systems_interconnection (OSI) architecture, the Physical signaling sublayer is the portion of the physical layer that:
	www.southcountryequity.com /Physical_layer (226 words)

	Introduction to Fast Ethernet, Course 103
		In terms of the OSI Reference Model, all the data rate variations are considered physical layer attributes, while the data link layer is common to all data rate variations.
		The Physical Medium Dependent now attaches to the MDI and the Physical Coding Sublayer (PCS) attaches to the MII.
		The PHY reports its type of physical layer, its ability to auto-negotiate and if it is capable of handling full-duplex operation.
	www.industrialethernetu.com /courses/103_2.htm (770 words)

	Toggit Certification Home for MCSE CCNA A+ study guides and test prep
		A 50-ohm resistor is placed at both ends of an Ethernet cable to prevent signals reflecting and interfering with the transmission.
		At the receiving end, the different signals are merged back into their individual streams.
		Physical topology describes where the cables are run and where the workstations, nodes, routers, and gateways are located.
	www.toggit.com /Library/pedia/techno.asp?Term=t&Techno=Letter (5570 words)

	Bandwidth Market, Ltd (Site not responding. Last check: 2007-10-20)
		physical optics: The branch of optics that treats light propagation as a wave phenomenon rather than a ray phenomenon, as in geometric optics.
		For example, a logical loop may consist of a physical star configuration, or a physical loop.
		picture fl: In TV and facsimile, pertaining to the signal or signal level that corresponds to the darkest part, i.e.
	www.telequipment.com /resources/glossary/P4.html (1494 words)

	signaling
		In a telecommunications network, the information exchange concerning the establishment and control of a connection and the management of the network, in contrast to user information transfer.
		The sending of a signal from the transmitting end of a circuit to inform a user at the receiving end that a message is to be sent.
		Signaling Gateway - Cell Signaling research, news, data and conferences
	www.fact-library.com /signaling.html (104 words)

	mccoy-pppext-pppoephy-00.txt (Site not responding. Last check: 2007-10-20)
		Consequently the use of Ethernet physical layer interfaces is attractive, but Ethernet (and its variations like RPR [12]) also are essentially redundant packet switching technologies.
		Historically, the Ethernet Layer 1 signal power is literally "off" between adjacent MAC frames hence its "idleness code" is indicated by lack of any signal.
		Clause 47, XGMII Extender Sublayer (XGXS) and 10 Gigabit Attachment Unit Interface (XAUI) This capability is optional in Ethernet and is a MAY for this protocol.
	www.potaroo.net /ietf/idref/draft-mccoy-pppext-pppoephy (3073 words)

	Cisco - Strategic Directions: Introduction to 10 Gigabit Ethernet
		The actual physical and logical topology is that of a very large LAN because the facility provider is not building a traditional SONET/ATM MAN, but instead is using 10 Gigabit Ethernet to build point-to-point links between Layer 3 through 4 switches.
		The functions of the WAN PHY are performed inside an optional sublayer defined by the 10 Gigabit Ethernet Standard called the WAN interface sublayer (WIS).
		Single-mode fiber cable reduces the diameter of the fiber cable core to between 8 and 10 microns, which is very close to the order of a wavelength, so that one single angle or "mode" of light energy passes along the fiber.
	www.cisco.com /warp/public/cc/techno/lnty/etty/ggetty/tech/10gig_wp.htm (6388 words)

	Glossary ->P
		This is done by sampling the signal and coding the sample.
		At the receiving end, the interleaved signals are separated and converted back to analog.
		One of the three ways of modulating or altering a signal so that it is able to carry information.
	www.nettedautomation.com /glossary_menue/glossary_p.html (1470 words)

	Physical Layer Encyclopedia Article, Definition, History, Biography (Site not responding. Last check: 2007-10-20)
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	www.karr.net /search/encyclopedia/Physical_layer (443 words)

	Read about Physical layer at WorldVillage Encyclopedia. Research Physical layer and learn about Physical layer here! (Site not responding. Last check: 2007-10-20)
		Research Physical layer and learn about Physical layer here!
		digital data in user equipment and the corresponding signals transmitted over a communications
		open systems interconnection (OSI) architecture, the Physical signaling sublayer is the portion of the physical layer that:
	encyclopedia.worldvillage.com /s/b/Physical_layer (232 words)

	Lin Wang - T361-3 (Site not responding. Last check: 2007-10-20)
		The Reconciliation Sublayer maps these signals to Physical Signaling primitives understood by the existing MAC sublayer.
		PCS (Physical Coding Sublayer) provides a uniform interface to the Reconciliation layer for all physical media.
		PMA (Physical Medium Attachment) provides a medium-independent means for the PCS to support various serial bit-oriented physical media.
	florin.stanford.edu /~t361/Fall2000/Lin%20Wang/T361-3.html (989 words)

	Physical layer electricity RS-422 contention Physical signaling sublayer hardware channel communications RS-232 line ... (Site not responding. Last check: 2007-10-20)
		Physical layer electricity RS-422 contention Physical signaling sublayer hardware channel communications RS-232 line code EIA
		» conversion between the representation of digital data in user equipment and the corresponding signals transmitted over a communications channel.
		Physical Layer Switch A Simple Solution For Network and Lab Physical Layer Automation APCON's IntellaPatch line of copper and fiber Physical Layer Switches provide network...
	en.powerwissen.com /QzIIsBGg32oocPcajYPRNw%3D%3D_Physical_layer.html (371 words)

	10 Mb/s
		Unlike 100BASE-TX and 100BASE-FX, 100BASE-T4 uses a different physical signaling method, 8B/6T, where 8 binary bits are transmitted in 6-bit ternary signals.
		IEEE 802.3z specification addressing repeaters, 8B/10B encoding and physical layers, as associated with Gigabit Ethernet technology.
		The symbol encoding method at the physical sublayer for FDDI, 100BASE-FX, and 100BASE-TX networks.
	www142.nortelnetworks.com /library/tpubs/terms/gloss_nu.htm (588 words)

	Vendors push for backplane interface spec
		The newly launched Higher-Speed Backplane Initiative (HSBI) is developing a two-pronged specification to define signaling on a purely physical layer and protocol interfaces on the physical-coding sublayer, in hopes of easing development of standards centered on 5 Gbits/second.
		Rogers said that although TI's customers are confused by the proliferation of bus and interconnect standards operating at Layer 2 and higher, they are rallying around the idea of a common backplane effort operating at physical layer and physical-coding sublayer (PCS).
		The founders believed it was important that the PCS effort allow existing protocols, such as Sonet/SDH and 8B/10B encoding, to be mapped into the HSBI interface.
	www.commsdesign.com /printableArticle?articleID=16505267 (682 words)

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