PLT (Photon Line Terminal)
OADMs (Optical Add/Drop Multiplexers) /
. 3. PLT OADM
( λ ) |
TETs (Transmit End Transponders) , λ ( )
N λ
IAI (Input Access Interfaces) OAI (Input Access Interfaces) PLT PLT
OUT (Optical Channel Transport Unit)
N
(Optical Booster)
TDM Time Division Multiplexing, ()
End-to-End . " "
. 4. PLT OADM
/ | ||
SDH ≤ 1010, PTS ≤ 1012 | ||
PTS ؖ / | , ( SDH, . ITU-T G. 957) ODM PLT OADM |
/
. G. 709 ITU-T (2001 .): " " (Network Node Interface for the Optical Transport Network (OTN) 02/01 + Amendment 11/01)
. 5. . G. 709 (2001 )
" " (Network Node Interface for the Optical Transport Network (OTN) 02/01 + Amendment 11/01) | |
, . | |
. s | |
PTS , . . . |
OLAs (Optical Line Amplifier)
OLRs (Optical Line Repeater)
ℓOAS OAS (Optical Amplifier Section)/ PLP
/ λ
/D,/(×) λ
|
|
-
TDFA (Terbium Doped Fiber Amplifier)
EDFA (Erbium Doped Fiber Amplifier)
YDFA (Ytterbium Doped Fiber Amplifier)
. 6.
SF . ITU-T G. 652 | - NZDSF . ITU-T G. 655 | |
α | 0,18 0,22 / | |
/ D | 17 20 /( ) λ = 1550 | ≤ 6 /( ) λ: 1528 1565 |
ℓmax OAS | ≤ 50 DCU (≈ 10 . $ 18,3 ) | ≥ 80 DCU |
ℓmax OAS OAS