====== PHY Type Notation ======
 
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Each type of PHY implement is specified by a __three-fields__ notation.

<WRAP centeralign>
$ <Data\ rate>\ <Modulation\ type>\ <Additional\ distinction> $ ((:9844436-p175))
</WRAP>

  * <wrap notation>Data rate</wrap> - if only a number, is in $Mb/s$,
    and if suffixed by a ''G'', is in $Gb/s$. ((:9844436-p175))
  * <wrap notation>Modulation type</wrap> - indicates how encoded data
     is transmitted on the medium.
    * ''BASE'', ''BROAD'', ''PASS'' – indicates baseband, broadband,
      or passband signaling respectively. ((:enwiki-1185296204))
  * <wrap notation>Additional distinction</wrap> - may identify 
    characteristics of transmission or medium and, in some cases,
    the type of PCS encoding used.
    <WRAP>
<WRAP not> Table 1. Additional distinguishing symbols 
((:enwiki-1185296204))((:synopsys-dwtb-cn-ethernet-2017q2))</WRAP>
<datatables>
^ Symbol          ^ Description                                     ^
| ''T''           | twisted pair                                    |
| ''S''           | 850 nm short wavelength (multi-mode fiber)      |
| ''L''           | 1300 nm long wavelength                         |
| ''E'' or ''Z''  | 1500 nm extra long wavelength (single-mode)     |
| ''B''           | bidirectional optics                            |
| ''P''           | passive optical                                 |
| ''C''           | copper/twinax                                   |
| ''K''           | backplane                                       |
| ''F''           | fiber                                           |
| ''H''           | plastic optical fiber                           |
| ''X''            | 8b/10b block encoding (4B5B for Fast Ethernet)  |
| ''R''           | large block encoding (64b/66b)                  |
</datatables>
</WRAP>

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