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This chapter describes the Collector Splitter module (CSM).
The CSM transfers optical signals between the DWDM add/drop side of the ONS 15201 SCU and the CLIP module. Only one CSM is used in each collector node. The CSM have a fixed defined splitter it splits the signal in proportion 50/50 or 100/0 (0/100). No filtering will take place and everything incoming will be brought to the CLIP receiver.
The CSM adds the output signal from the CLIP DWDM laser to the DWDM add/drop interface. Adding and dropping takes place in the external (ONS 15216) filter, where the added wavelength encounters the line signal. The CSM transparently transfers the incoming dropped signal from the ONS 15216 OADM. In protected mode, two signals goes to the A and B receivers on the ONS 15201 CLIP module. In unprotected mode, this signal goes to one receiver only.
Refer to Chapter 1 of the Cisco ONS 15200 Product Description for optical loss information.
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Note The CSM does not have any alarm or supervisory interconnections. |
The following tables show how the CSM is connected to the SCU. For detailed optical hookup and testing procedures, refer to the Cisco ONS 15200 Installation, Setup, and Test Manual.
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Caution Remember to always clean the fiber optic connectors before inserting them into the adapters. |
Table 7-1 shows the CSM to SCU SC connections. The connectors are numbered 1, 2, 3 and 4 in a 50/50 NAM. In a 100/0 + 0/100 NAM one of the connectors is labeled A and the other has no label.
The MU cables are connected on the front panel of the CLIP module. Table 7-2 explains how to connect the MU connectors. The connectors are labeled A and B in a 50/50. The 100/0 + 0/100 has one connector labeled A and another without a label. The unlabeled optical fiber jumper cable transmits the optical signal from the CLIP to the CSM module.
This section provides optical, environmental, and mechanical specifications for the CSM. Electrical specifications and default thresholds do not apply.
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Note For optical loss information, refer to Chapter 1 of the Cisco ONS 15200 Product Description. |
Table 7-3 lists CSM environmental specifications during normal operation
Table 7-3 CSM Environmental Specifications
| Item | Specification |
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Short term operating temperature |
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Short term operating relative humidity (per Telcordia GR-63-Core, NEBS level 3) |
The CSM is available in two version:
The fiber type is 0.9-mm diameter SMF enhanced with 2 mm outside the CSM housing enclosure. The splitter uses two SC and one MU connector.
Table 7-4 lists the CSM mechanical specifications.
This section explains how to replace and remove the CSM and the CFM. The CFM (Collector Filter Module) is not used in this Release of the ONS 15200 system. The replacement procedure of the CFM is the same as for the CSM. Both modules are used only in the ONS 15201 SCU.
To replace a CSM or CFM module, complete the following procedure:
1. Remove the CSM from the ONS 15201 SCU
2. Replace the Collector Splitter Module in the ONS 15201 SCU
The following procedure describes how to remove a CSM from the ONS 15200 SCU.
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Caution Be careful not to pull the optical fibers or make sharp bends in the fibers. Always clean and inspect the MU or SC connectors before inserting them into the adapters. |
Step 2 Loosen the five screws on the right side two turns (shown in Figure 7-2).
Step 3 Remove the lid by sliding to the right.
Step 4 Remove the two screws that hold the rear connector panel in place (shown in Figure 7-3).
Step 5 Remove the rear connector panel.
Step 6 Remove the left-front panel cover of the ONS 15201 SCU, as shown in Figure 7-4.
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Note The SCU front panel, illustrated in Figure 7-4, shows A and B line connections on the front. Also shown is an optional rear placement of these connections. The rear connection is not present on current equipment. |
Step 7 Remove the four retaining screws from the CSM.
Step 8 Disconnect the CSM optical connectors one at a time and put dust caps on them.
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Caution Always put dust plugs on the adapters where the connectors were previously installed. |
Step 9 Carefully lift and remove the CSM from the ONS 15201 SCU.
Step 10 Replace the cover (if you do not plan to replace the CSM in the near future).
The following procedure describes how to replace a CSM from the ONS 15200 SCU.
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Caution Be careful not to bend the MU cables excessively during this procedure. |
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Caution Be careful not to damage the optical fiber cables while inserting the module. |
Step 2 Carefully insert the CSM into the ONS 15201 SCU. Guide the MU connectors to come out on the front of the SCU.
Step 3 Align the four holes in the CSM case with the four module stand-offs located inside the ONS 15201 SCU. When properly aligned the module stand-offs will fit into the holes in the CSM case.
Step 4 Fasten the CSM to the module stand-offs with four retaining screws.
Step 5 Clean and inspect the optical connectors one at a time before they are connected.
Step 6 Connect the CSM optical fiber jumper cables to the A-side and B-side adapters (SC to SC) in accordance with the labels located on the cables and Figure 7-5 through Figure 7-7.
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Note For detailed instructions on connecting the CSM optical fiber, refer to the Cisco ONS 15200 Installation, Setup, and Test Manual. |
Figure 7-5 shows the 50/50 splitting ratio optical signal connections.
Figure 7-6 shows the 0/100 splitting ratio optical signal connections.
Figure 7-7 shows the 100/0 splitting ratio optical signal connections.
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Note The same CSM is used for splitting ratios 100/0 and 0/100. The splitting ratios of 100/0 and 0/100 are available through different connections. Make sure that the CBAK jumpers of the ONS 15201 SCU correctly reflect the splitting ratio (Figure 7-8 and Table 7-5). |
Step 7 Route the CSM to the CLIP module optical adapters through the opening in the front panel of the ONS 15201 SCU.
Figure 7-8 shows the CBAK (Collector Backplane) connectors in the ONS 15200 SCU backplane.
Step 8 Align the rear connector cover with its retaining screws.
Step 9 Install the connector cover by pushing down on it and sliding it forward.
Step 10 Using a slot or Phillips screwdriver, tighten the connector cover retaining screws.
Step 11 Align the CSM access lid with its retaining screws.
Step 12 Install the CSM access lid by pushing down on it and sliding it to the left.
Step 13 Using a slot or Phillips screwdriver, tighten the retaining screws on the CSM access lid.
Posted: Thu Apr 17 15:23:07 PDT 2003
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