Technical data

TraverseEdge 2020 Applications and Engineering Guide, Chapter 4: Equipment Protection
Page 4-6 Turin Networks Release 5.0.x
The bottom two slots in row 6 are dedicated DS3/EC1 PLM slots. Refer to Figure 4-8.
Figure 4-8 ETS2 DS3/EC1 PLM Protection
The Transmux PLM may be used in place of the standard DS3/EC-1 PLM. If the Transmux PLM is used it
must be used in both the work and protect slot.
4.5.3 DS1 PLM
The DS1 Physical Layer Module (PLM) is used in the ETS2 shelf and is available in both 28 port and 84
port versions.
Up to four DS1 PLMs can be installed in each ETS2 shelf in a working/protect arrangement. Rows 2 and 4
are for protect cards and rows 3 and 5 are for working cards. The DS1 PLMs may be configured in unpro-
tected arrangements as well by not populating slots 2 and 4 with another DS1 PLM. These slots may alter-
natively be equipped with the FastE x12 PLM (which does not offer protection mechanism) . If a slot is not
populated, then a DS1/FE PLM Blank (WR-PBLNK-006-00000) must be installed in the vacant PLM
position. Refer to Figure 4-9.
Figure 4-9 DS1 PLM Protection
4.5.4 FAN Protection
The fan trays utilized in each shelf house multiple fan units. The fans are controlled by the CCT cards in
each shelf which monitor the fan operation and current readings. The TE-2020 Main Shelf Fan Tray and
OTS2 Fan Tray have twelve in-line fans. The TE-2020 Main Fan has a craft port and reset buttons. The
TE-2020 Main Fan Tray is shown in Figure 4-10. The OTS2 Fan Tray is shown in Figure 4-11. The ETS
Fan Tray shown in Figure 4-12 can be utilized in the ETS1 or ETS2. The ETS Fan Tray has six fans to
maintain the shelf temperature.