Cisco ONS 15200 Module Handbook, Release 1.0.1
Chapter 12, Connection Module X
Table of ContentsConnection Module X
12.1 Functional Description
12.2 Technical Specifications
12.3 Removal and Replacement
Procedure: Remove the Connection Module X from the Passive Optical Shelf
Procedure: Replace the Connection Module X in the Passive Optical Shelf
The function of the CMX is to connect the filters in two ONS 15252 Multichannel Units (MCU). The CMX is, in principle, a Bridge module (BM) with longer fibers. The CMX is used to pass traffic on wavelengths not dropped in the first ONS 15252 MCU to the second ONS 15252 MCU and vice versa. The CMX connects A-side filter banks in one chassis to B-side filter banks in another chassis. This crossover is needed for systems using more than 16 Client Layer Interface Port (CLIP) boards in the MCU. If the CMX is not used, the MU connectors on the last HFM modules can be terminated by replacing the CMX with two Termination modules (TM).
Figure 12-1 illustrates a CMX.
Figure 12-1 CMX side view
Figure 12-2 illustrates a block diagram of the CMX. Note that the fibers in the CMX are crossed and not coupled straight.
Figure 12-2 CMX block diagram
This section provides environmental and mechanical specifications for the CMX module. The CMX module is a passive device; therefore, optical and electrical specifications, as well as default thresholds do not apply.
Environmental specifications for the CMX module during operating conditions are listed in Table 12-1.
The CMX module uses two 5.0 m (16.40 feet) SMF patch cords. Table 12-2 lists CMX module mechanical specifications.
This section explains how to remove and replace the CMX. The CMX module is installed in the passive optical shelf of the ONS 15252 MCU when you are planning to setup the ONS 15200 system in the mesh configuration. The replacement modules and any supplies, such as tagging materials, should be present on site before beginning the removal and replacement procedures.
Step 1 Open the passive optical shelf covers of the ONS 15252 MCUs that are connected.
Step 3 Put dust caps on the duplex MU connector.
Step 4 Put dust plugs in the adapters on the CMX.
Step 5 Raise the CMX half to expose the lateral grooves, and remove the fiber. Also, remove the fiber from the lateral grooves of the DFM between the LM and the first HFM.
Step 6 Push the button at the bottom of the CMX front panel to release it from the passive optical shelf. Move the CMX upward and slide it out of the passive optical shelf.
Step 9 Close the doors of the passive optical shelves.
Step 1 Open the passive optical shelf covers of the ONS 15252 MCUs that are to be connected.
Step 3 Place a CMX half in the passive optical shelf at the end of the row of HFM modules where the TM was removed. Make sure the slot on the back of the module interlocks with the crossbeam located in the passive optical shelf.
Step 4 Push the front panel button to snap the CMX into place.
Step 5 Remove the dust plugs from the MU-MU duplex adapter in the CMX.
Step 6 Remove the dust caps located on the optical fiber MU-MU duplex connector.
Step 7 Clean, inspect, and insert the MU duplex connector from the adjacent HFM in the CMX half.
Step 8 Guide the optical fiber cable from the CMX through the lateral grooves on the sides (top front) of the CMX and out through similar grooves on a DFM adjacent to the LM.
Step 11 Close the cover, making sure no fiber is pinched in the process.