Hitachi GR2000 - Manual (Page 157)

indication
Status Green Yellow Extinguished
No APS O
APS steady
state
Working being selected O
Protection being selected O
APS
switching
over
Working being selected O
Protection being selected O
Lamp tested O
Table 3-70 Connector Specifications for NWOC48-1A, NWOC48-1A4 and NWOC48-1A
NIF Connector Specifications
NWOC48-1A SC 2-core (flat) connector (singlemode fiber)
NWOC48-1A4 SC 2-core (flat) connector (singlemode fiber)
NWOC48-1A8 SC 2-core (flat) connector (singlemode fiber)