Datasheet

1-16
Cisco ONS 15454 SDH Reference Manual, R7.0
October 2008
Chapter 1 Shelf and FMEC Hardware
1.11 Power and Ground Description
Caution Do not operate an ONS 15454 SDH without a fan-tray air filter. A fan-tray air filter is mandatory.
1.11 Power and Ground Description
Ground the equipment according to standards or local practices.
The ONS 15454 SDH has redundant –48 VDC power connectors on the MIC-A/P and MIC-C/T/P
faceplates. To install redundant power feeds, use the two power cables shipped with the
ONS 15454 SDH and one ground cable. For details, see the “3.17 MIC-A/P FMEC” section on
page 3-30 and the “3.18 MIC-C/T/P FMEC” section on page 3-33.
Caution Only use the power cables shipped with the ONS 15454 SDH.
1.12 Alarm, Timing, LAN, and Craft Pin Connections
Caution Always use the supplied ESD wristband when working with a powered ONS 15454 SDH. Plug the
wristband cable into the ESD jack located on the lower-right outside edge of the shelf assembly.
The MIC-A/P and the MIC-C/T/P FMECs in the EFCA area at the top of the ONS 15454 SDH shelf are
used for enabling external alarms, timing input and output, and craft interface terminals to the
ONS 15454 SDH. For details, see the “3.17 MIC-A/P FMEC” section on page 3-30 and the
“3.18 MIC-C/T/P FMEC” section on page 3-33.
1.13 Cards and Slots
ONS 15454 SDH cards have electrical plugs at the back that plug into electrical connectors on the shelf
assembly backplane. When the ejectors are fully closed, the card plugs into the assembly backplane
Figure 1-13 shows card installation.