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2.4 Information about the Extension Cards
74 Installation Manual
LED Indications
Indication Color Description
ON LINE Green On-line status indication
• ON: At least one port is in use (an IP-PT is connected)
• OFF: No ports are in use (no IP-PTs are connected)
Note
If the LINK indicator is OFF, the ON LINE indicator will also be
OFF.
ALARM Red Alarm indication
•ON: Alarm
• OFF: Normal
LINK Green Link status indication
• ON: Normal connection
• OFF: Connection error
DATA Green Data transmission indication
• ON: Data transmitting
• OFF: No data transmitted