SDH
SDH , . , , .
SDH () :
1. ( );
2. ( );
3. Q; F;
4. SCU (System Control Unit).
.
:
1. ( );
2. :
(Q-) (F-). q; f.
SDH
1. .
(LCT) () ( 1) :
1) ;
2) -;
3) ;
4) ;
5) ( ), .
LCT (SCU) . LCT Ethernet.
TTF (Terminal Transport Function STM-1) ( ).
SDH
1
( LCT); Local Control Unit.
;
Q NMS (System Management Network ());
F DCN (Data Communications Network Element), Network ;
NE ();
DCC (Data Communication Chanel) STM-N;
SCU (System Control Unit).
:
1. ;
2. .
: ; , , .
SDH
- | OPT (Optical Power Transfer) OPR (Optical Power Receiver) | |
RS (Regenerator Section) | B1 SOH (BIP-8) | BBE (Background Block Error) ES (Errored Second) SES (Severely Error Second) (2 ) (UAS) Unavailable Seconds |
A1; A2 SOH OOF (Out of Frame) | OFS (Out of Frame Seconds) LOF (Loss of Frame) | |
JO SOH | RS TIM (RS Trace Identifier Mismatch) | |
MS (Multiplex Section) | B2 SOH BIP-N*24 | BBE; ES; SES; UAS |
M1 SOH MS REI (Remote Error Indication) () | FE (Far-End) BBE; FE-ES; FE-SES; FE-UAS; MS-REI | |
K2 SOH | MA-AIS (Alarm Indication Signal) MS-RDI (Remote Defect Indication) | |
() AU (Administrative Unit) | H1, H2, AU-4 PJ (AU-4) Point Justification (Administrative Unit-4) | PJE +; PJE (Point Justification Event) AU-4 AU-LOP (Loss Pointer) AU-AIS |
() () HP (Higher-Order Path) | B3 VC-4 BIP-8 | BBE; ES; SES; UAS |
G1 VC-4 POH | HP-REI (HP Remot Error Indication) HP-RDI (HP Remot Defect Indication) HP-RDI-EP (Enhanced Payload Defect) , HP-RDI-ES (Enhanced Server Defect) HP-RDI-EC (Enhanced Connectivity Defect) , | |
J1 VC-4 POH | HP-TIM (Trace Identifier Mismatch) | |
C2 VC-4 POH | HP-PLM (Payload Label Mismatch) HP-UNEQ (Unequipped VC Indication) | |
() LO (Lowe-Order Path) | V5 VC-12 POH BIP-2 | BBE; ES; SES; UAS |
V5 VC-12 POH G1 VC-4 POH | LP-REI; LP-RDI | |
K4 VC-12 POH | LP-RDI-ES; LP-RDI-EC; LP-RDI-EP | |
V5 VC-12 POH | LP-RFI (LP-Remote Fault Indication) | |
J2 VC-12 POH | LP-TIM (LP-Trace Identifier Mismatch) | |
V5 VC-12 POH C2 VC-4 POH | LP-PLM (LP-Payload Label Mismatch) LP-UNEQ (LP-Unequipped) | |
TU (Tributary Unit) () | V1; V2 PTR TU-12 H4 VC-4 POH | TU-LOP (Loss of Pointer) TU-AIS TU-LOM (Loss of Multiframe) |
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