SDH 8.1. 8.2 SDH, G.957, G.703 -. , SDH , , :
G.783 SDH (. 8.1):
LOI (Lower Order Interface) ;
LPC (Lower Order Path Connection) ( );
LCS (Lower Order Connection Supervision) ;
HOA (Higher Order Assembler) ;
HOI (Higher Order Interface) ;
HPC (Higher Order Path Connection) ( );
HCS (Higher Order Connection Supervision) ;
TTF (Transport Terminal Function) .
, . / 1 ( G.783):
SEMF (Synchronous Equipment Management Function) ;
MCF (Message Communication Function) ;
SETS (Synchronous Equipment Timing Source) ;
SETPI (Synchronous Equipment Timing Physical Interface) ;
OHA (Overhead Access Function) - .
. 8.1. SDH
. 8.2. SDH
. 8.1 :
, .
N MCF RST, (DCCR) ;
MCF MST, (DCCM) ;
S (S1S19) SEMF, ;
(04) SETS, ;
U OHA, () ;
Y MST SETS ( );
V MCF SEMF ( ).
SDH . , HPT, HPA m/n, LCS, LPC, LPT-m, LPA-m, PPI 2, 6, 34 /. , HPT, LPA-n, PPI 140 /.