: "-", "", " ", " ".
- (P2P). P2P (. 3.1) . P2P , (proprietary) , . P2P . , .
. (. 3.2) SDH . . , , .
, .
. 3.1. P2P
. 3.2.
, , (collapsed rings), . , .
. (. 3.3) . Ethernet 1000/100/10 / (1000Base-LX, 100Base-FX, 10Base-FL). ( IP-, ). Ethernet, , . , .
. 3.3.
PON (P2MP). PON (. 3.4) "-" P2MP (point-to-multipoint), PON, - , . , (), .
. 3.4.
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, PON , . . . , NTT PON , -, ! , ( ) ( ) , PON , PON , .
PON:
- ; ;
- ;
- (, ).
P2MP , .
PON .
PON
PON - OLT ONT . . 3.5.
, - OLT, , . OLT ONT () , , 1550 . , , () , 1310 . OLT ONT WDM, .
. , . ONT, , . , .
. ONT , TDMA (time division multiple access). , ONT, c , ONT OLT. TDMA MAC.
. 3.5. PON
PON
PON 1995 , (British Telecom, France Telecom, Deutsche Telecom, NTT, KPN, Telefonia Telecom Italia) , . , ITU-T, FSAN (full service access network). - , - 90- . FSAN PON , PON. FSAN 40 , ITU-T, ETSI ATM .
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APON/BPON. 90- , ATM QoS . FSAN, PON, ATM. 1998 ITU-T G.983.1, ATM PON APON (ATM PON). G.983.x (x=17), 622 /c.