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This chapter describes the Release 2.0 Network Adaptation Module (NAM) for application with external DWDM filters.
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Note NAMs of either Release 1.0 or Release 1.0.1 of the ONS 15200 system must not be mixed with NAMs of Release 2.0. They are incompatible. |
This section provides a description of the NAM, which is illustrated in Figure 5-1.
The NAM extracts the output signal from the dense wavelength division multiplexing (DWDM) laser on the Client Layer Interface Port (CLIP) module and transfers it to the A side, the B side, or both sides. In optically protected systems, the NAM splits the output signal from the DWDM laser on the CLIP module and transfers it to the A and the B sides. The NAM can split the signal symmetrically (50/50). In optically unprotected systems, the NAM transfers the optical signal to the A or B side (100/0). The output splitting ratio is controlled by a fixed optical coupler and cannot be changed without replacing the NAM.
The NAM also transfers the incoming optical signal from another node to the receiver(s) of the CLIP module.
The LEDs on the front panel of the NAM display the status of the CLIP module that is mounted directly above it.
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Note The NAM is active, but does not include alarm or supervisory subunit functions. |
The connectors below the NAM allow direct connection between the NAM (ONS 15252 MCU) and the ONS 15216 system. In the protected version all four connectors are in use. In the unprotected version only two connectors are in use. Figure 5-2 describes how to use the connectors for a protected or unprotected connection. This label is inside the lower cover of the ONS 15252 MCU.
For details about how to connect the NAM connection panel to the opposite connectors in the ONS 15216 MUX/DEMUX system, refer to the Cisco ONS 15200 Installation, Setup and Test Manual and to the ONS 15216 documentation.
The NAM front-panel LEDs are used to monitor CLIP operating parameters. Monitored items include the alarms, power, and status. Figure 5-3 shows the front panel LEDs, which are described in Table 5-1.
| LED | Orientation | Condition (When Lit) |
|---|---|---|
Indicate active (A) and standby (S)—The active side carries live traffic and the standby side provides a fail-over path. |
A CLIP module is mounted directly above the NAM. Two (unprotected) or three (protected) fibers come from the NAM to the CLIP module front panel. The receiver fibers are labeled A and B.
Four DWDM-side fibers come from a protected NAM (two DWDM-side fibers from an unprotected NAM). These fibers are separated into two groups, labeled A and B. Each group includes two optical fiber connectors (type SC), one from the transmitter and one from a receiver side.
Each fiber pair is labeled A or B. The transmitting fibers include a label to indicate the coupling ratio (100, 50 or 0). This label helps you connect the fibers correctly to each ONS 15216 MUX/DEMUX optical port.
An unprotected NAM does not include an optical coupler. It has only two patch cords, one for the receiver and one for the transmitter. For unprotected CLIP modules, use the receiver labeled A for the received optical signal. Figure 5-4 is a block diagram of the NAM used in protected configurations. Figure 5-5 is a block diagram of the NAM used in unprotected configurations.
Located on lower right-hand corner of the NAM module, there is a 4-bit configuration header (jumpers) that the CLIP uses to identify the splitting ratio of the NAM. These jumpers display the splitting ratio in the web interface and the CLI. The jumpers are numbered 1 through 4. Table 5-2 lists the jumper setting for each splitting ratio. Figure 5-6 displays the location of the jumpers.
| Jumper | Splitting Ratio |
|---|---|
This section covers environmental and mechanical specifications for the NAM. Although the NAM is an active device, optical and electrical specifications do not apply.
Table 5-3 lists environmental specifications for the NAM during operating conditions.
Table 5-3 NAM Environmental Specifications
| Item | Specification |
|---|---|
Short term operating temperature |
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Short term operating relative humidity (per Telcordia GR-63-Core, NEBS level 3) |
All NAMs consist of the following parts:
Protected NAMs consist of the following additional parts:
Unprotected NAMs consist of the following additional parts:
Table 5-4 lists NAM mechanical specifications.
Table 5-4 NAM Mechanical Specifications
| Item | Specification |
|---|---|
0.20 kg (0.4 lb) protected version |
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Note NAMs of either Hardware Release 1.0 or Release 1.0.1 of the ONS 15200 system must not be mixed with NAMs of Release 2.0. They are incompatible. |
This section explains how to remove and replace a NAM. Make sure you have the replacement module and any supplies, such as tagging materials, present on site before beginning the removal and replacement procedures.
The ONS 15252 MCU shelf (Product No. 800-12163-03) for application with external DWDM filter required the NAMs with a "NEBS-3" print on the faceplate (e.x. NAM with splitting ratio 50/50 product No. 800-20632-01 or NAM with splitting ratio 100/0 Product No. 800-20633-01). All other version of the NAM are incompatible for application with external DWDM filter. For more information about the shelf versions, refer to the Cisco ONS 15200 Product Description.
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Caution Placing NAMs without NEBS-3 print on the faceplate into the shelf (Product No. 800-12163-03) may result in equipment damage. Such a configuration is not recommended nor supported by Cisco; it may void the warranty. |
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Warning The ONS 15200 is energized with -48 VDC power. |
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Caution Static electricity can damage electro-optical modules. While handling electro-optical modules, wear a grounding wrist strap to discharge the static buildup. Wrist straps are designed to prevent static electricity damage to equipment. |
Follow the steps to remove and replace a NAM from the ONS 15252 MCU
1. Remove a NAM from the ONS 15252 MCU
2. Replace a Protected NAM in the ONS 15252 MCU
3. Replace a Unprotected NAM in the ONS 15252 MCU
This section describes how to remove a NAM from the MCU.
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Warning Follow proper safety procedures when removing modules without switching off the relevant subrack. |
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Warning Do not look directly at the optical connector output beams during connector removal. The beams can cause permanent eye damage. |
Step 2 Put caps on the ends of all disconnected optical fiber jumper cables.
Step 3 Put dust plugs in all SC adapters (two for unprotected and four for protected) in the optical connector panel of the NAM.
Step 4 One at a time, disconnect the three (or two unprotected) MU connectors at the CLIP module:
Step 5 Using a slot or Phillips screwdriver, loosen the NAM retaining screw.
Step 6 Carefully remove the NAM from the slot.
Step 7 If you are not going to replace the NAM immediately, carefully insert a Dummy NAM into the slot.
This section describes the replacement procedure of a NAM in protected mode. For this procedure an ONS 15252 MCU and two ONS 15216 MUX/DEMUX (Red Band or Blue Band) are necessary.
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Caution Before replacing a NAM, verify that the NAM is the appropriate release for the shelf assembly, or equipment damage could result. For an ONS 15200 (application with external DWDM filters) shelf assembly (800-12162-03) the NAM front panel should display NEBS-3. NAMs without NEBS-3 on the front panel are not allowed to be used. Otherwise, equipment damage can result. |
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Note If you are replacing a NAM, remove the currently installed NAM. If you are replacing a Dummy NAM, remove the Dummy NAM from the relevant NAM position. |
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Note Before replacing the NAM, verify that the NAM jumpers are set to match the label on the NAM module. See Table 5-2 for the NAM jumper settings. |
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Warning Follow proper safety procedures when removing modules without switching off the relevant subrack. |
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Warning Do not look directly at the optical connector output beams during connector removal. The beams can cause permanent eye damage. |
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Note Make sure that the NAM is properly inserted in the ONS 15252 MCU guide rails (in particular, the lower guiding rail). |
Step 2 Carefully seat the NAM into the slot, making sure the backplane connector and the NAM connector are correctly mated and that no fibers are damaged.
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Caution Be sure not to harm the optical fibers and connectors emerging from the NAM. |
Step 3 Using a slot or Phillips screwdriver, tighten the NAM retaining screw.
Step 4 Connect the three MU connectors from the NAM to the three MU adapters in the corresponding CLIP module. Begin with the inner connectors, labeled A and B, and connect the outer transmitter connector last. Figure 5-8 shows a connected NAM and CLIP module.
Step 5 Remove the dust cap from the relevant MU connector.
Step 6 Clean and inspect the relevant MU connector.
Step 7 Remove the dust plugs from the relevant MU adapter.
Step 8 One at a time, remove the dust plugs from the NAM connection panel.
Step 9 Clean and inspect the optical connectors of the fiber cable.
Step 10 Connect the first fiber cable to the lower 50 adapter of the NAM on the far left, (Figure 5-9 and Table 5-5). The fiber should be connected to the MUX side of the first ONS 15216 MUX/DEMUX (i.e. the A side).
Step 11 Remove the plug on the ONS 15216 MUX/DEMUX, remove the cap on the connector, and inspect and clean the connector before inserting it into the adapter. Connect the fiber to the MUX side of the first ONS 15216 MUX/DEMUX (i.e. the A side), as shown in Figure 5-10.
Step 12 Connect the second fiber cable to the upper 50 adapter of the NAM on the far left, (Figure 5-9 and Table 5-5). The fiber should be connected to the MUX side of the second ONS 15216 MUX/DEMUX (i.e. the B side).
Step 13 Remove the plug on the ONS 15216 MUX/DEMUX, remove the cap on the connector, and inspect and clean the connector before inserting it into the adapter. Connect the fiber to the MUX side of the second ONS 15216 MUX/DEMUX (i.e. the B side) as shown in Figure 5-10.
Step 14 Connect the third fiber cable to the A adapter of the NAM on the far left, (Figure 5-9 and Table 5-5). The fiber should be connected to the DEMUX side of the first ONS 15216 MUX/DEMUX (i.e. the A side).
Step 15 Remove the plug on the ONS 15216 MUX/DEMUX, remove the cap on the connector, and inspect and clean the connector before inserting it into the adapter. Connect the fiber to the DEMUX side of the first ONS 15216 MUX/DEMUX (i.e. the A side) as shown in Figure 5-10.
Step 16 Connect the fourth fiber cable to the B adapter of the NAM on the far left, (Figure 5-9 and Table 5-5). The fiber should be connected to the DEMUX side of the second ONS 15216 MUX/DEMUX (i.e. the B side).
Step 17 Remove the plug on the second ONS 15216 MUX/DEMUX, remove the cap on the connector, and inspect and clean the connector before inserting it into the adapter. Connect the fiber to the DEMUX side of the second ONS 15216 MUX/DEMUX (i.e. the B side) as shown in Figure 5-10.
Step 18 Use the labeling on the fiber to ensure that the A side and the B side of the node are not interchanged. Figure 5-10 shows a NAM connected to ONS 15216 MUX/DEMUX optical port.
Step 19 After connecting the NAM to the ONS 15216 MUX/DEMUX, route the fiber through the lateral brackets on both the ONS 15252 and the ONS 15216 MUX/DEMUX.
Step 20 Wind the fiber into a loop with approximately 80-mm diameter and fix it with the enclosed straps.
Step 21 Route the fiber through the holding device on the NAM.
Step 22 Route the fiber through the fiber guides on the ONS 15252 shelf.
Step 23 Verify that the fiber is firmly fixed in the lateral brackets on side of the ONS 15216 MUX/DEMUX and ONS 15252 shelf.
Step 24 Repeat this procedure for all subsequent ONS 15252 NAMs.
Table 5-5 describes the functionality of each NAM connector in protected mode.
Table 5-5 NAM Connectors in Protected Mode (50/50)
Step 25 Close the lid over the passive optical shelf.
This section describes the replacement procedure of a NAM in unprotected mode. For this procedure an ONS 15252 MCU and an ONS 15216 MUX/DEMUX (Red Band or Blue Band) are necessary, depending on wavelength used.
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Caution Before replacing a NAM, verify that the NAM is the appropriate release for the shelf assembly or equipment damage could result. For an ONS 15200 (application with external DWDM filters) shelf assembly (800-12162-03) the NAM front panel should display NEBS-3. NAMs without NEBS-3 on the front panel must not be used; otherwise, equipment damage could result. |
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Note If you are replacing a NAM, remove the currently installed NAM. If you are replacing a Dummy NAM, remove the Dummy NAM from the relevant NAM position. |
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Note Before replacing the NAM, verify that the NAM jumpers are set to match the label on the NAM module. See Figure 5-13, Table 5-6, and Table 5-7 for the NAM jumper settings. |
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Warning Follow proper safety procedures when removing modules without switching off the relevant subrack. |
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Warning Do not look directly at the optical connector output beams during connector removal. The beams can cause permanent eye damage. |
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Note Make sure that the NAM is properly inserted in the ONS 15252 MCU guide rails (in particular, the lower guiding rail). |
Step 2 Carefully seat the NAM into the slot, making sure that the backplane connector and the NAM connector are correctly mated and that no fibers are damaged.
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Caution Be sure not to harm the optical fibers and connectors emerging from the NAM. |
Step 3 Using a slot or Phillips screwdriver, tighten the NAM retaining screw.
Step 4 Connect the three MU connectors from the NAM to the three MU adapters in the corresponding CLIP module. Begin with the inner connectors, labeled A and B, and connect the outer transmitter connector last. Figure 5-12 shows a connected NAM and CLIP module.
Step 5 Remove the dust cap from the relevant MU connector.
Step 6 Clean and inspect the relevant MU connector.
Step 7 Remove the dust plugs from the relevant MU adapter.
Step 8 One at a time, remove the dust plugs from the NAM connection panel.
Step 9 Clean and inspect the optical connectors of the fiber cable.
Step 10 Connect the first fiber cable to the A adapter of the NAM on the far left, (Figure 5-13, Table 5-6, and Table 5-7). The fiber should be connected to the DEMUX side of the ONS 15216 MUX/DEMUX.
Step 11 Remove the plug on the ONS 15216 MUX/DEMUX, remove the cap on the connector, and inspect and clean the connector before inserting it into the adapter. Connect the fiber to the DEMUX side of the ONS 15216 MUX/DEMUX, as shown in Figure 5-14.
Step 12 Connect the second fiber cable to the 100 adapter of the NAM on the far left, (Figure 5-13, Table 5-6, and Table 5-7). The fiber should be connected to the MUX side of the ONS 15216 MUX/DEMUX.
Step 13 Remove the plug on the ONS 15216 MUX/DEMUX, remove the cap on the connector, and inspect and clean the connector before inserting it into the adapter. Connect the fiber to the MUX side of the ONS 15216 MUX/DEMUX as shown in Figure 5-14.
Step 14 Use the labeling on the fiber to ensure that the connections of the node are not interchanged. Figure 5-14 shows a NAM connected to ONS 15216 MUX/DEMUX optical port.
Step 15 After connecting the NAM to the ONS 15216 MUX/DEMUX, route the fiber through the lateral brackets on both the ONS 15252 and the ONS 15216 MUX/DEMUX.
Step 16 Wind the fiber into a loop with approximately 80-mm diameter and fix it with the enclosed straps.
Step 17 Route the fiber through the holding device on the NAM.
Step 18 Verify that the fiber is firmly fixed in the lateral brackets on the side of the ONS 15216 MUX/DEMUX and ONS 15252 shelf.
Step 19 Repeat this procedure for all subsequent ONS 15252 NAMs.
Table 5-6 and Table 5-7 describes the functionality of each NAM connector in unprotected mode.
Table 5-6 NAM Connectors in unprotected mode (100/0)
| NAM Connector | Description |
|---|---|
This adapter is associated with the receive A side of the ONS 15252. |
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This adapter is associated with the transmit A side of the ONS 15252. |
Table 5-7 NAM Connectors in unprotected mode (0/100)
| NAM Connector | Description |
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This adapter is associated with the receive B side of the ONS 15252. |
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This adapter is associated with the transmit B side of the ONS 15252. |
Step 20 Close the lid over the passive optical shelf.
Posted: Thu Apr 17 15:23:15 PDT 2003
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