Visual ID Behavior Description
0 wr0 wr0 corresponds to upper SFP in
the stack
B ▲ Master / Dis-
abled
Led B is disabled if this port is providing
timing to other equipment (master
mode) or disabled
▲
Active slave Led B is green when port is the active
slave that discipline the device
▲
Passive slave Led B is orange when port is in pass-
ive/monitoring mode (§5.1)
D ▲ Link down When link is down led D is disabled
▲
Link up When link is up the led D stays in green
▲
Activity Blinks in orange each time a packet is
received on this port
1 wr1 wr1 corresponds to lower SFP in
the stack
A ▼ Link down When link is down led A is disabled
▼
Link up When link is up the led A stays in green
▼
Activity Blinks in orange each time a packet is
received on this port
C ▼ Master / Dis-
abled
Led C is disabled if this port is providing
timing to other equipment (master
mode) or disabled
▼
Active slave Led C is green when port is the active
slave that discipline the device
▼
Passive slave Led C is orange when port is in pass-
ive/monitoring mode