User manual

Chapter 3. Installation
22 Version 1.2 Apr 2006
3.5 Removal/Replacement Procedures
3.5.1 Optical Module Removal / Replacement (Hot Swappable)
The optical interfaces are installed into the front of the Fiber Multiplexer. The front plane
connectors of the internal mainboard provide both DC power to the optical interface cards and
routes signals from the cards to the multiplexing/de-multiplexing circuitry. Two separate modular
interfaces are provided for connection to the primary optical transmit and receive pair and to the
redundant optical transmit and receive pair (if the redundant optical interface module is installed).
From here, the de-multiplexed signals are sent to the individual 4-CHANNEL Card module/channel
installed in the rear of the unit (see 3-5-2 for removal/replacement procedures).
To remove either interface module, loosen the captive thumb screws until the threads are
disengaged from the chassis. Gently pull the card straight forward by the captive screws using equal
force to avoid binding. The card is only held by the friction of the connector. To install an optical
module, reverse the procedure, taking care when seating the module to avoid connector damage.
Gently, don't force it! Re-tighten the captive screws but don't over-tighten.
Figure 3-5 : Optical Interface Removal / Replacement (while in service)
Loosen the captive screws. Remove fiber cables
Pull out the module by the captive screws. Reverse the procedure with replacement.