CTC Union FRM220-NMC, User Manual, Page: 11 / 182

Chapter 1 Introduction
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1.5 FRM220 NMC Connections
Figure 1-4 FRM220 NMC Connections
1.6 FRM220 NMC Fault Handling
The FRM220 management is designed is such a way as to minimize any disruption to normal traffic in the
event of any single component failure and to allow rapid recovery of full operations through replacement of FRUs
(Field Replaceable Units).
The Power Modules support fully redundant operation. Utilizing a modular design, any mix of AC or DC power
sources may be used to supply power to the FRM220 CH20 Chassis. Power modules are completely "Hot
Swappable". As long as one module is able to supply power, the chassis will operate non-stop. Removing any one
power module from a two module redundant chassis will not effect the operation of the entire chassis in any
manner.
All cards are designed to be "Hot Swappable". This includes any media converter cards as well as the NMC
card itself. The following describes what happens logically for any card fault and subsequent replacement.
1.6.1 NMC card Fault and Replacement
If the NMC card should develop a fault, all media converter cards in the chassis will continue to run with their
current configuration settings, with no negative effect to any traffic. The defective NMC may be pulled from the
running chassis, without affecting any other media converter card. When a replacement NMC is inserted into the
"hot" chassis, it will boot and immediately recognize that it is booting into an already running "hot" chassis. The
TCP/IP and SNMP settings will either be factory default (if the card was not previously provisioned) or the settings
will reflect previous provisioning. All provisioning settings from all the installed media converter cards and all remote
media converters will be downloaded into the new NMC card and saved. If any future system power off is
experienced, all previous settings are restored to each media converter card from the NMC.
When the NMC is rebooted, hot swapped, or upgraded, it will not effect any running media converter card's
transmissions in any way.
1.6.2 Media Converter card Fault and Replacement
If a media converter card develops a fault, it may immediately be replaced with a spare media converter card of
same type. The new card will be loaded with exactly the same settings as the previous card, from the provisioning
settings stored in the NMC.
If a media converter card is replaced with a different type media converter in the same slot, the NMC will
recognize that the card has been changed with different type converter and will upload the factory default for that
card.
DB9F to DB9M Console
Cable, provided w/ NMC
Connect to PC's COM
port
Cat 5 or 6 Ethernet Cable
(not included)
Connects to PC's LAN or
to Network's Switch
PC with TCP/IP
and Terminal Emulator