The lowest layer in the Open Systems Interconnection (OSI) network model. The physical layer addresses the electrical and mechanical procedures associated with the interface that connects a device to a transmission medium. See OSI.

The cables, connectors, and connection ports of a network. The passive physical components required to create a network.

Layer one of the OSI reference modes; encodes, modulates and transmits data across physical links (i.e., the transmission medium, such as coaxial cable) on the network; also defines the network's physical signalling characteristics.

Level 0 (the lowest layer) in the OSI architecture. Concerns itself with the voltage levels, cabling, speed, and signaling used between equipment.

The first layer of the OSI model, which represents the hardware used for communication.

Layer 1 in the OSI model. The Physical Layer concerns with how a connection is set up in the physical medium of a network. It specifies physical and electrical characteristics of the network, i.e. cable, connector, voltage level, and signaling. RS-232, UTP, coaxial cable, fiber optic operate at the Physical Layer. The Physical Layer handles information in binary digit (bit). It converts electrical signals into bits and vice versa. Also see OSI model.

The lowest level of the OSI reference model. The Physical layer specifies the physical transmission media, signaling levels, connectors, & related interface features.

Layer 1 of the OSI reference model. The physical layer defines the electrical, mechanical, procedural and functional specifications for activating, maintaining, and deactivating the physical link between end systems. Corresponds with the physical control layer in the SNA model. See also application layer, data link layer, network layer, presentation layer, session layer, and transport layer.

Layer 1 in the Open System Interconnection (OSI) architecture; the layer that provides services to transmit bits or groups of bits over a transmission link between open systems and which entails electrical, mechanical and handshaking procedures.

Layer-1 of the OSI model that establishes protocols for voltage, data transmission timing, speed, operation mode (FDX, HDX), transmission formatting asych vs synch, and connector pin-outs.

Layer one of the seven OSI layers. This layer is responsible for the transmission of signals between computers.

The first layer in the Open Systems Interconnection model.

The first layer of the OSI reference model. This layer manages the transfer of individual bits of data over wires or whatever medium is used to connect the communicating computers.

Layer 1 in the OSI model; defines and handles the electrical and physical connections between systems. The physical layer can also encode data into a form that is compatible with the medium (coaxial, twisted pair, fiber, and so on).

The lowest layer of the ATM model, roughly corresponding to the OSI physicallayer. Standards for the ATM model's physical layer, like those for theOSI model's physical layer, specify how to send bits over the transmissionmedium.

Layer 1 of the OSI model. Concerned with the electrical, mechanical, and timing aspects of signal transmission over a medium.

Layer 1 in the Open Systems Interconnect (OSI) 7-Layer Network Layer Reference Model. That layer of a distributed communications system concerned with the actual transmission of data across a physical medium. The physical layer provides a physical connection for transmission of data between two data link entities.

A software layer that transmits bits from one computer to another and regulates the transmission of a stream of bits over a physical medium. This layer defines how the cable is attached to the network adapter and which transmission technique is used to send data over the cable.

Provides for the transmission of data through a communications channel by defining the electrical, mechanical, and procedural specifications for IEEE 802 local-area networks. The PHY is the lowest layer within the OSI reference model. It deals primarily with transmission of the raw bit stream over the physical transport medium. In the case of wireless LANs, the transport medium is free space. The PHY defines parameters such as data rates, modulation method, signaling parameters, transmitter/ receiver synchronization, and so on. Within an actual radio implementation, the PHY corresponds to the radio front-end and baseband signal-processing sections.

Handles transmission of raw bits over a communication channel. The physical layer deals with mechanical, electrical, and procedural interfaces.

Layer 1 of the seven-layer OSI model, which specifies the physical medium of a network. It is the wire on which data is transmitted and it is the connectors, hubs, and repeaters that comprise the network. Some refer to the physical layer as the hardware layer.

The OSI layer that provides the means to activate and use physical connections for bit transmission. In plain terms, the Physical Layer provides the procedures for transferring a single bit across a Physical Media.

The bottom layer in the OSI seven-layer reference model. This layer is responsible for physical signaling—including connectors, timing, voltages, and related issues. Data sent over the physical layer are termed symbols.

The part of the communication protocol between the mobile station and thebase station that is responsible for the transmission and reception of data. The physical layer in the transmitting station is presented a frame by the multiplex sublayer and transforms it into an over-the-air waveform. The physical layer in the receiving station transforms the waveform back into a frame and presents it to the multiplex sublayer above it.

Layer 1 of ADSI, it describes the electrical specifications of the interface, including FSK modem-based data transmission (reception) and in-band signaling.

The Physical Layer receives messages from the Communications Stack and converts the messages into physical signals on the fieldbus transmission medium, and vice-versa.

Layer 1, the bottom layer of the OSI model, is implemented by the physical channel. The Physical layer insulates Layer 2, the Data Link layer, from medium-dependent physical characteristics such as baseband, broadband or fiber-optic transmission. Layer 1 defines the protocols that govern transmission media and signals.

The actual portion of a network that is used to physically connect computers of a network and over which the data is transmitted - the cable.

In the OSI layering model, the physical layer (layer 1) is the electrical and mechanical layer. Protocols for this layer describe, on an electrical and mechanical basis, the methods used to transfer bits from one device to another. One protocol used at this layer in ISDN is CCITT recommendation I.430/I. See also data link layer, end-to-end layers, layer, network layer, Open System Interconnect (OSI).

Layer 1 of the OSI model. The layer concerned with electrical, mechanical, and handshaking procedures over the interface connecting a device to the transmission medium.

this is the part of the device interacting with the medium. For a radio LAN, the physical layer is also called modem.

Layer 1 of the OSI model. Defines the electrical, optical, mechanical, and procedural characteristics of the interface.

Physical Layer is a layer in the Transport Control Protocol / Internet Protocol (TCP/IP) reference model that provides the computer with direct access to the transmission medium (e.g. LAN cables).

(Wireless) The services that provide the transport medium in a network.

Layer 1 of the OSI Reference Model. It describes the electrical and physical connection standards between communication devices.

Layer 1 of the OSI reference model. Provides the means to activate and use physical connections for bit transmission. Defines protocols governing transmission media and electrical or optical signals. In plain terms, the physical layer provides the procedures for transferring data across a network physical medium.

The physical layer is level one in the seven level OSI model of computer networking as well as in the five layer TCP/IP reference model. It performs services requested by the data link layer.