Technical data

TraverseEdge 2020 Applications and Engineering Guide, Chapter 4: Equipment Protection
Page 4-4 Turin Networks Release 5.0.x
Figure 4-4 TE-2020 Main Shelf Protection Grouping
Optical PLMs in an OTS2 are in the same arrangement as the upper section of the TE-2020 Main shelf.
Refer to Figure 4-5 below.
Figure 4-5 Optical Tributary Shelf Protection Grouping
When configured as a terminal, one card will be operating as working with a protect card in stand-by. If a
card failure or fiber cut occurs, all traffic in the direction of the failure will switch to the protect card.
When configured as a UPSR, no card level switching is supported since the protection provided is inherent
at the path level and all switching is performed at the path level. GbE PLMs do not currently support pro-
tection operation.
4.5.2 DS3/EC1 PLM
Protection for user traffic within the ETS1 is based on 1:N equipment protection. 1:N is defined as “N”
working channels bridged to a single protection line (currently N can be up to 4 cards). Equipment protec-
tion involves switching only on equipment failures. Examples of equipment failures are faulty framers,
board reset, fuse blown, etc. Due to the signal being bridged internal to the node, facility protection would