Maintenance Mode - GE VersaMax GFK-2721A Manual

Maintenance Mode

Chapter
5
In Maintenance Mode, the remote node can be serviced while maintaining network connectivity.
Maintenance Mode allows carriers and other components to be changed without network
disruption such as opening a ring topology.
Note: To use maintenance mode, the VersaMax PNS must be –AB version or later. Previous
versions must be upgraded to firmware to version 1.10 or later to support this feature.
As received from the factory, the PNS module powers up into Normal Mode. When it is in this
mode, the PNS provides the full set of PNS functionality, which includes supplying power to the
backplane and controlling the other modules in the stick. The MAINT LED will be OFF when the
PNS is in Normal mode.
When the VersaMax PNS enters Maintenance Mode, the PNS head-end disables control and
power to the backplane modules up to the first Power Supply Booster in the stick. This allows
workers to safely work on the device while power is still applied to the PNS itself so that the
network connectivity is maintained. VersaMax supports hot insertion/extraction of a module into
a carrier. It does not support hot reconfiguration of carriers.
Regardless of whether the PNS is in Normal mode or Maintenance mode, the PNS keeps its
Ethernet switch functional, and (if so configured) continues to support the Media Redundancy
protocol.
M
!
A
VersaMax PNS
I
GFK-2721A
Maintenance mode
removes power from
these modules
Power Supply
Remove power from
Booster Power Supply
before removing,
adding or replacing
these modules
Optional Booster
Power Supply
5-1