IE-iMcV-T1-Mux/4+Ethernet
8
there is a mixture of iMcV modules, with and without Configuration Control, the
Write Lock Switch and a new SNMP Management Module must be taken into
consideration.
If the command
cleandb
is applied to an SNMP Management Module, all the
settings for the modules will be removed; but the Configuration Control modules
will still be based on the last change made. Those without Configuration Control
will be set to their default settings.
NOTE
:
If the end user has a mixture of standard iMcV modules as well as Configuration Control iMcV modules,
it is important to understand how SNMP and DIP Switches will impact the cards depending on their capability.
Standard iMcV modules cannot be upgraded to Configuration Control capability, so it is strongly recommended
to set the DIP Switches on the modules and then configure them via software to match the same settings.
1+1 PROTECTION ON FIBER INTERFACE MODE
The fiber transport is a 1+1 protection switched transport. It provides very fast (<50 mSec)
switch-to-protect timing by transmitting the same information on both fibers at the same
time. The fiber receiver then chooses the fiber to receive based on the validity of the line.
Once the selection is made, the receiver will stay on that fiber line until it enters a fiber
defect state at which time another fiber selection process is started (non-revertive
switching). Once a switch-to-protect has occurred, a hold off time (1 second minimum) is
used to prevent another switch-to-protect from occurring too soon after a protection
switch.
If protection is not enabled, SFP Port A will be used by default and no alarm or defect
information will be provided for SFP Port B. The LEDs associated with the backup fiber
line will only be active if protection is enabled.
When protection is enabled, error reporting for the backup fiber line is limited to the Signal
LOS condition. Signal LOS will generate an SFP Down Trap.
A Remote Alarm Indication (RAI-F) signal is sent back to the fiber if the received fiber is in
BER or LOS defect condition. In this way, the far end unit is alerted of a fault condition on
the local fiber line.
