, VC12, SDH :
LPOM (Lower order Path Overhead Monitor) .
LUG (Lower order Unequipped Generator) .
13.1.
. 13.1. LCS
LCS (VC12, POH). () LCS ( LOI) LCS. LCS , .. .
LPC VC12 . LPC , , -. , , LPC.
LPC, . .
14.1 LPC. VC12, LPC, ʢ I. , , LPC . III, - . I , .
. 14.1. LPC
VC12 . (SEMF), S8. SEMF LPC:
;
LPC ;
LPC .