we have two OSN 3500 connect to each other through two STM-64 (1+1 MSP)and one STM-1 link .when fiber of slot 8 is unplugged , we loose communication with remote site although the service is ok.
OSN Software version is :22.214.171.124
NE Login Fail
from the DCC mangement menu on NE Explorer
disable the SDH interfaces that is not used as aggregate line to connect to the remote stations (SLT1 Card), so there will be enough DCC bytes to be used for
we found the service is carried through SLT1 card which has 12 STM-1 ports, this card reserved all DCC bytes as the maximum Bytes can be used is 120 Byte for OSN .
in such cases where the NE has many optical interfaces check the DCC channel allocation either by T2000 or by Command Line :