5Features and Specifications Features and Specifications by NSG Model
channel fails. NSGs with the redundancy feature do not have a primary
and secondary channel but rather have two symmetrical GbE channels.
Therefore, when a redundant channel is activated it will continue to
operate and will not revert back to the previously active channel when
that channel recovers.
Redundancy for both GbE1 and GbE2 is activated by one of two NSG
alarms:
■
Chapter 3, “GbE X Link down,”
■
Chapter 3, “GbE X SFP not mounted,”
Note: Automatic GbE channel redundancy is unavailable in Switching
mode. In this mode the ports are configured to work independently and
to receive different GbE feeds.
Note: Automatic GbE channel redundancy is unavailable when using
copper SFP. The redundant channel is activated only when the alarm
SFP not mounted appears. The SFP does not trigger the GbE link down
alarm.
NSG Backup Capability
The NSG includes a Non Volatile RAM (NVRAM) that is also powered by a
lithium battery. The NVRAM allows configuration backup and maintains
the NSG time.
Caution: Risk of explosion if battery is replaced by an incorrect
type. Dispose of used batteries according to the instructions.
Features and Specifications by NSG Model
The following table describes the features of the NSG 9100.
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