G.775 FRENCH-1998 Loss of Signal (LOS)@ Alarm Indication Signal (AIS) and Remote Defect Indication (RDI) defect detection and clearance criteria for PDH signals
CRIT?RES DE D?TECTION ET D'ANNULATION DES D?FAUTS DE PERTE DE SIGNAL@ DE SIGNAL D'INDICATION D'ALARME ET D'INDICATION DE D?FAUT DISTANT EN HI?RARCHIE NUM?RIQUE PL?SIOCHRONE
Loss of Signal (LOS)@ Alarm Indication Signal (AIS) and Remote Defect Indication (RDI) defect detection and clearance criteria for PDH signals 是非强制性国家标准,您可以免费下载前三页