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Physical layer

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Common Ethernet interfaces include fiber or two to four copper pairs for data communication. However, there now exists a new interface, called Single Pair Ethernet (SPE), which is able to utilize a single pair of copper wires while still communicating at the intended speeds.
694:, which were developed in the same era, along similar lines, though with somewhat different abstractions. Beyond internetworking, the OSI abstraction can be brought to bear on all forms of device interconnection in data communications and computational electronics. 808:, is a high-level networking description used for the Internet and similar networks. It does not define a layer that deals exclusively with hardware-level specifications and interfaces, as this model does not concern itself directly with physical interfaces. 648:
is the first and lowest layer: the layer most closely associated with the physical connection between devices. The physical layer provides an electrical, mechanical, and procedural interface to the transmission medium. The shapes and properties of the
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transmission technologies of a network. It is a fundamental layer underlying the higher level functions in a network, and can be implemented through a great number of different hardware technologies with widely varying characteristics.
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into hardware-specific operations to cause transmission or reception of electronic (or other) signals. The physical layer supports higher layers responsible for generation of logical
1734: 2078: 1815: 1151:. It implements the physical layer portion of the Ethernet. Its purpose is to provide analog signal physical access to the link. It is usually interfaced with a 933: 1225:: The PHY portion consists of the RF, mixed-signal and analog portions, that are often called transceivers, and the digital baseband portion that use 1655: 1209:
Alaska 88E1310/88E1310S/88E1318/88E1318S Gigabit Ethernet transceivers, Texas Instruments DP838xx family and offerings from Intel and ICS.
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More specifically, the Ethernet PHY is a chip that implements the hardware send and receive function of Ethernet
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The major functions and services performed by the physical layer are: The physical layer performs bit-by-bit or
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may also be used as a suffix to form a short name referencing a specific physical layer protocol, for example
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Within the semantics of the OSI model, the physical layer translates logical communications requests from the
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KS8721CL – 3.3 V single power supply 10/100BASE-TX/FX MII physical layer transceiver
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Historically, the OSI model is closely associated with internetworking, such as the
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and provides the bridge between the digital and modulated parts of the interface.
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At the electrical layer, the physical layer is commonly implemented by dedicated
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is used to convert data into a pattern of electrical fluctuations which may be
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to use and similar low-level parameters, are specified by the physical layer.
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To optimize reliability and efficiency, signal processing techniques such as
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osuosl.org - ICS1890 10Base-T/100Base-TX Integrated PHYceiver datasheet
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Texas Instruments DP83825 – 3 × 3 mm 3.3 V PHY chip
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may be grouped into code words or symbols and converted to a physical
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Lowest-level electronic or optical transmission functions of a network
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The physical layer defines the means of transmitting a stream of raw
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or another system that takes care of the higher layer functions.
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Bayliss, Colin R.; Bayliss, Colin; Hardy, Brian (2012-02-14).
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The following technologies provide physical layer services:
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is a component that operates at the physical layer of the
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Other topics associated with the physical layer include:
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SimpliPHY and SynchroPHY VSC82xx/84xx/85xx/86xx family,
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Carrier-sense multiple access with collision detection
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protocols for sharing the transmission medium may use
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Transmission and Distribution Electrical Engineering
1912: 683:family of interconnect protocols are widely used. 1997:Forouzan, Behrouz A.; Fegan, Sophia Chung (2007). 1198:DP83TD510E is an example of a PHY which uses SPE. 1963: 2192: 1127: 2024:Mauricio Arregoces; Maurizio Portolani (2003). 1653: 959:may be applied to further improve reliability. 748: 1996: 1964:Bertsekas, Dimitri; Gallager, Robert (1992). 1166:; it interfaces between the analog domain of 613: 2060:. Electronics.stackexchange.com. 2013-07-11 1120:family) complement a PHY chip and form the 1079:device (often called MAC as an acronym for 1676:Fundamentals of Sensor Network Programming 1041:"PHY" redirects here. For other uses, see 761:is the portion of the physical layer that 620: 606: 30:"PHY" redirects here. For other uses, see 1288:(SATA): Serial ATA controllers use a PHY. 866:or a wireless communication link such as 1322:(controller area network) physical layer 1131: 1032: 1024: 843:. The physical layer is responsible for 1887: 1672: 1091:. A PHY device typically includes both 792:Relation to the Internet protocol suite 14: 2193: 1772: 765:interfaces with the data link layer's 653:, the frequencies to transmit on, the 1756:"DATA COMMUNICATION & NETWORKING" 1212: 1170:and the digital domain of link-layer 1724: 1635:from the original on 1 February 2021 1186:functionality is implemented in the 1816:"physical signaling sublayer (PLS)" 1487:Mobile Industry Processor Interface 892:. The flow of data is managed with 729:The physical layer consists of the 24: 2000:Data Communications and Networking 1482:Low-voltage differential signaling 1083:) to a physical medium such as an 25: 2212: 2174: 1701:"The Physical Layer | InterWorks" 910:asynchronous serial communication 1784: This article incorporates 1779: 868:free-space optical communication 2146: 2135: 2124: 2099: 2071: 2050: 2017: 1990: 1957: 1933: 1906: 1881: 1857: 1797:General Services Administration 1292: 2131:Intel PHY controllers brochure 1833: 1808: 1748: 1718: 1693: 1654:Gorry Fairhurst (2001-01-01). 1647: 1621: 820:data delivery over a physical 13: 1: 1614: 1128:Ethernet physical transceiver 974:line configuration; physical 845:electromagnetic compatibility 780:, reception and decoding and, 1888:Shekhar, Amar (2016-04-07). 1673:Iyengar, Shisharama (2010). 1433:technologies physical layers 1427:air interface physical layer 1421:air interface physical layer 1415:air interface physical layer 1070:network interface controller 1060:, usually implemented as an 755:Open Systems Interconnection 666:electronic design automation 7: 1582: 1567:Visible light communication 1153:media-independent interface 1099:(PMD) layer functionality. 811: 759:physical signaling sublayer 749:Physical signaling sublayer 722:that is transmitted over a 10: 2217: 2154:"Physical Layer | Layer 1" 1725:Shaw, Keith (2018-10-22). 1310:Avionics Digital Video Bus 1168:Ethernet's line modulation 1040: 29: 1972:. Prentice Hall. p.  1498:Optical Transport Network 1280:Infrared Data Association 1155:(MII) to a MAC chip in a 1114:fiber-optic communication 1112:Modular transceivers for 1097:physical medium dependent 1029:RTL8201 Ethernet PHY chip 955:and techniques including 2181:Physical Layer (Layer 1) 2027:Data Center Fundamentals 1522:links, and E1 and other 1431:Communications satellite 1227:digital signal processor 1093:physical coding sublayer 957:forward error correction 849:electromagnetic spectrum 757:(OSI) architecture, the 2186:10G Layer 1 Walkthrough 1360:Ethernet physical layer 1014:transmission mode; and 798:Internet protocol suite 697: 688:Internet protocol suite 1792:Federal Standard 1037C 1786:public domain material 1679:. Wiley. p. 136. 1188:network interface card 1140: 1052:, an abbreviation for 1038: 1030: 1020: 953:Error correction codes 932:such as in Ethernet's 1461:Recommendations: see 1235:medium access control 1201:Examples include the 1135: 1081:medium access control 1036: 1028: 922:medium access control 902:start-stop signalling 854:and specification of 826:electrical connectors 767:medium access control 651:electrical connectors 1869:datatracker.ietf.org 1845:datatracker.ietf.org 1493:Modulated ultrasound 1269:Universal Serial Bus 1178:'s job. Similarly, 1043:PHY (disambiguation) 898:serial communication 852:frequency allocation 32:PHY (disambiguation) 1737:on December 4, 2017 1569:co-ordinated under 1443:IEEE 1394 interface 1390:and other varieties 972:point-to-multipoint 930:collision detection 894:bit synchronization 822:transmission medium 753:In a network using 724:transmission medium 638:computer networking 632:In the seven-layer 1529:Telephone network 1213:Other applications 1141: 1062:integrated circuit 1058:electronic circuit 1039: 1031: 945:training sequences 785:galvanic isolation 731:electronic circuit 166:Presentation layer 2111:Texas Instruments 2086:Texas Instruments 1599:Data transmission 1196:Texas Instruments 1149:OSI network model 1075:A PHY connects a 914:circuit switching 834:transmission line 630: 629: 58:Application layer 16:(Redirected from 2208: 2168: 2167: 2165: 2164: 2150: 2144: 2139: 2133: 2128: 2122: 2121: 2119: 2117: 2103: 2097: 2096: 2094: 2092: 2083: 2075: 2069: 2068: 2066: 2065: 2054: 2048: 2047: 2045: 2044: 2021: 2015: 2014: 1994: 1988: 1987: 1971: 1961: 1955: 1954: 1952: 1951: 1945:en.wikibooks.org 1937: 1931: 1930: 1910: 1904: 1903: 1901: 1900: 1885: 1879: 1878: 1876: 1875: 1861: 1855: 1854: 1852: 1851: 1837: 1831: 1830: 1828: 1827: 1818:. 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Archived from 1656:"Physical Layer" 1651: 1645: 1644: 1642: 1640: 1625: 1604:Intrinsic safety 1407:Um air interface 1273:embedded systems 1239:system-on-a-chip 1172:packet signaling 976:network topology 970:, multipoint or 818:symbol-by-symbol 800:, as defined in 706:over a physical 674:mobile computing 622: 615: 608: 49: 37: 36: 21: 2216: 2215: 2211: 2210: 2209: 2207: 2206: 2205: 2191: 2190: 2177: 2172: 2171: 2162: 2160: 2152: 2151: 2147: 2140: 2136: 2129: 2125: 2115: 2113: 2107:"Ethernet PHYs" 2105: 2104: 2100: 2090: 2088: 2081: 2077: 2076: 2072: 2063: 2061: 2056: 2055: 2051: 2042: 2040: 2038: 2022: 2018: 2011: 1995: 1991: 1984: 1962: 1958: 1949: 1947: 1939: 1938: 1934: 1927: 1911: 1907: 1898: 1896: 1886: 1882: 1873: 1871: 1863: 1862: 1858: 1849: 1847: 1839: 1838: 1834: 1825: 1823: 1814: 1813: 1809: 1789: 1780: 1778: 1777: 1773: 1764: 1762: 1754: 1753: 1749: 1740: 1738: 1723: 1719: 1710: 1708: 1699: 1698: 1694: 1687: 1671: 1667: 1652: 1648: 1638: 1636: 1627: 1626: 1622: 1617: 1585: 1580: 1439:physical layers 1295: 1237:(MAC) layer in 1215: 1157:microcontroller 1130: 1046: 1023: 1016:autonegotiation 1002:communication; 920:. More complex 896:in synchronous 856:signal strength 814: 794: 769:(MAC) sublayer, 751: 739:data link layer 700: 626: 597: 596: 502: 491: 490: 387: 385:Data link layer 376: 375: 309: 298: 297: 263: 261:Transport layer 252: 251: 214: 203: 202: 168: 157: 156: 60: 44: 43: 35: 28: 23: 22: 15: 12: 11: 5: 2214: 2204: 2203: 2189: 2188: 2183: 2176: 2175:External links 2173: 2170: 2169: 2145: 2134: 2123: 2098: 2070: 2049: 2036: 2016: 2009: 2003:. Huga Media. 1989: 1982: 1956: 1932: 1925: 1905: 1880: 1856: 1832: 1807: 1803:on 2022-01-22. 1771: 1747: 1717: 1692: 1686:978-1423902454 1685: 1665: 1662:on 2009-06-18. 1646: 1619: 1618: 1616: 1613: 1612: 1611: 1606: 1601: 1596: 1594:Clock recovery 1591: 1584: 1581: 1579: 1578: 1573: 1564: 1563:physical layer 1555: 1554:physical layer 1549: 1548:physical layer 1543: 1542:physical layer 1537: 1527: 1516: 1511: 1506: 1501: 1495: 1490: 1489:physical layer 1484: 1479: 1474: 1465: 1456: 1451: 1450:physical layer 1445: 1440: 1434: 1428: 1422: 1416: 1410: 1409:physical layer 1401: 1400:physical layer 1391: 1357: 1352: 1328: 1323: 1317: 1316:physical layer 1311: 1305: 1299: 1294: 1291: 1290: 1289: 1283: 1276: 1266: 1214: 1211: 1129: 1126: 1054:physical layer 1022: 1019: 978:, for example 968:point-to-point 890:infrared light 813: 810: 793: 790: 789: 788: 781: 770: 750: 747: 699: 696: 642:physical layer 628: 627: 625: 624: 617: 610: 602: 599: 598: 595: 594: 589: 584: 582:ITU-T G.hn PHY 579: 574: 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Retrieved 1623: 1296: 1293:Technologies 1219:Wireless LAN 1200: 1192: 1161: 1145:Ethernet PHY 1144: 1142: 1111: 1102: 1101: 1089:copper cable 1074: 1053: 1049: 1047: 992:star network 961: 941:equalization 938: 918:multiplexing 906:flow control 886:carrier wave 876: 837:signal level 815: 795: 778:transmission 758: 752: 743:data packets 736: 728: 701: 685: 670:design block 668:(EDA), by a 664:chip or, in 659: 645: 641: 631: 499: 149: 1552:PCI Express 1540:TransferJet 1388:1000BASE-SX 1180:Wake-on-LAN 1012:full duplex 1008:half duplex 936:(CSMA/CD). 878:Line coding 710:connecting 572:IEEE 802.16 567:IEEE 802.15 562:IEEE 802.11 486:IEEE 802.11 457:Frame Relay 2163:2021-07-28 2116:12 October 2091:12 October 2064:2015-11-18 2043:2015-11-18 1950:2019-02-15 1899:2019-02-15 1874:2021-07-28 1850:2021-07-28 1826:2011-07-29 1765:2019-02-15 1741:2019-02-15 1711:2018-08-14 1705:InterWorks 1615:References 1535:ITU-T V.92 1384:1000BASE-T 1380:100BASE-FX 1376:100BASE-TX 1362:Including 1286:Serial ATA 1278:IrDA: The 1176:link layer 1124:sublayer. 1116:(like the 1095:(PCS) and 1077:link layer 847:including 776:encoding, 557:IEEE 802.3 481:Q.922 LAPF 452:IEEE 802.3 432:IEEE 802.2 219:Named pipe 2201:OSI model 1894:Fossbytes 1865:"rfc1123" 1841:"rfc1122" 1524:E-carrier 1520:T-carrier 1509:SONET/SDH 1355:Etherloop 1314:Bluetooth 1308:ARINC 818 1203:Microsemi 1066:OSI model 882:modulated 860:bandwidth 858:, analog 841:impedance 783:performs 772:performs 716:bitstream 708:data link 655:line code 634:OSI model 592:Bluetooth 577:IEEE 1394 537:SONET/SDH 498:1.  383:2.  361:AppleTalk 305:3.  259:4.  210:5.  164:6.  56:7.  41:OSI model 2195:Category 1639:10 March 1633:Archived 1583:See also 1533: — 1364:10BASE-T 1184:Boot ROM 1056:, is an 1000:parallel 964:bit rate 812:Services 806:RFC 1123 802:RFC 1122 692:Ethernet 151:more.... 1372:10BASE5 1368:10BASE2 1342:EIA-423 1338:EIA-422 1320:CAN bus 1207:Marvell 1004:simplex 884:onto a 646:layer 1 224:NetBIOS 145:NETCONF 2034:  2007:  1980:  1923:  1683:  1609:SerDes 1558:802.11 1531:modems 1398:G.9960 1350:RS-485 1346:RS-449 1334:RS-232 1303:1-Wire 1164:frames 1137:Micrel 996:serial 830:cables 774:symbol 720:signal 714:. The 676:, the 640:, the 512:RS-449 507:RS-232 474:  335:ICMPv6 135:Telnet 99:HTTP/3 90:Gopher 2082:(PDF) 1788:from 1561:Wi-Fi 1526:links 1500:(OTN) 1463:ITU-T 1259:WiMAX 1223:Wi-Fi 1107:M-PHY 1068:in a 872:radio 681:*-PHY 672:. In 527:I.431 522:I.430 412:CSLIP 356:IS-IS 341:IPsec 248:X.225 244:SOCKS 188:ASCII 183:ASN.1 47:layer 2118:2020 2093:2020 2032:ISBN 2005:ISBN 1978:ISBN 1921:ISBN 1681:ISBN 1641:2023 1477:LoRa 1454:ISDN 1448:IRDA 1413:UMTS 1394:G.hn 1261:and 1182:and 1143:The 1109:. 1103:-PHY 988:mesh 984:ring 947:and 928:and 904:and 839:and 828:and 804:and 796:The 704:bits 698:Role 690:and 476:LAPB 472:X.25 447:L2TP 427:PLIP 417:SLIP 407:HDLC 402:SDLC 366:X.25 346:IGMP 331:ICMP 324:IPv6 319:IPv4 288:QUIC 283:DCCP 278:SCTP 234:PPTP 173:MIME 140:DHCP 130:SNMP 125:SMTP 115:SMPP 95:HTTP 65:NNTP 1576:X10 1546:USB 1514:SPI 1504:SMB 1472:I²S 1468:I²C 1459:ITU 1419:LTE 1404:GSM 1331:EIA 1326:DSL 1263:UWB 1251:LTE 1221:or 1122:PMD 1118:SFP 1087:or 1050:PHY 1021:PHY 1010:or 998:or 990:or 980:bus 916:or 908:in 900:or 888:or 870:or 726:. 662:PHY 644:or 636:of 587:USB 552:DSL 547:OTN 542:PON 532:PDH 467:PPP 442:MAC 437:LLC 422:GFP 397:ARP 392:ATM 371:PLP 351:IPX 293:SPX 273:UDP 268:TCP 239:RTP 229:SAP 198:PGP 193:TLS 178:XDR 120:SSH 110:NTP 105:NFS 85:FTP 80:DNS 75:SSI 70:SIP 45:by 18:PHY 2197:: 2156:. 2109:. 2084:. 2030:. 1976:. 1974:61 1943:. 1892:. 1867:. 1843:. 1795:. 1758:. 1729:. 1703:. 1631:. 1470:, 1425:5G 1386:, 1382:, 1378:, 1374:, 1370:, 1366:, 1348:, 1344:, 1340:, 1336:, 1257:, 1255:5G 1247:4G 1243:3G 1072:. 1048:A 1006:, 994:; 986:, 982:, 966:; 943:, 874:. 745:. 314:IP 2166:. 2120:. 2095:. 2067:. 2046:. 2013:. 1986:. 1953:. 1929:. 1902:. 1877:. 1853:. 1829:. 1768:. 1744:. 1714:. 1689:. 1643:. 1396:/ 1265:. 1253:/ 1249:/ 1245:/ 1045:. 787:. 621:e 614:t 607:v 337:) 333:( 101:) 97:( 34:. 20:)

Index

PHY
PHY (disambiguation)
OSI model
layer
Application layer
NNTP
SIP
SSI
DNS
FTP
Gopher
HTTP
HTTP/3
NFS
NTP
SMPP
SSH
SMTP
SNMP
Telnet
DHCP
NETCONF
more....
Presentation layer
MIME
XDR
ASN.1
ASCII
TLS
PGP

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