Maintenance Guide

Cobham Wireless
idDAS Installation and Maintenance Guide 00109GU Rev. 2.0
Page | 103
6.6.1.2 MTDI Unit Replacement
This section provides basic information on replacing the MTDI unit. If the new unit is of exactly the same
model and configuration as the previous unit, the Clone option can be used to transfer the configuration
from the suspect unit to the new unit after the physical installation. (The Clone option will be referred to in
the instructions).
ATTENTION! Before reconnecting CPRI cables, be sure to clean the CPRI cable and
SFP interfaces using standard fibre cleaning procedures. See Section 6.10.
To replace an MTDI unit
1. Unpack the replacement MTDI enclosure and set it aside on a flat clean surface.
2. Record the serial number of the suspect unit – located externally on the label at the side of the
enclosure.
3. Disable the routing profile (Section 6.9.1).
x Open an idDAS web GUI session.
x Click the Routing Profiles hover-menu option and select the ‘disabled’ routing profile option.
This disables all routing profiles.
4. Label all the cables connected to the RF modules of the suspect MTDI so they can be reconnected
correctly.
5. Uninstall the suspect MTDI as follows:
x Disconnect power.
x Label and disconnect the CPRI connecters.
x Disconnect the RF connectors.
x Disconnect the GND connector.
x Dismount the suspect MTDI along with its brackets and place it on a flat surface.
6. Clean the external surface of the suspect MTDI of dust and pack it in the packaging of the new MTDI for
transport.
7. Referring to the relevant section in Chapter 4, install the replacement MTDI:
x Mount the new MTDI in the rack.
x Ground the unit.
x Clean the CPRI cables and the SFP connector and connect the CPRI cables.
x Reconnect the RF cables according to the labels.
x Connect power.
8. Verify the following LEDs flash as follows:
x RF board LED – flash green every few seconds.
x ST LED – slow blinking green (~3sec OFF and 3sec ON).