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This chapter describes the Dummy Network Adaptation module (DNAM).
This section provides a description of the DNAM, which is illustrated in Figure 6-1.
The DNAM fills the empty space (if any exists) in the ONS 15200 MCU between the NAM modules and the CIM. The DNAM is passive and does not include alarm or supervisory subunit functions, or front-panel indicators, connectors, or adjustments. The DNAM fulfils the EMC requirements if any of the NAM slots are not equipped.
This section includes environmental and mechanical specifications for the DNAM. The DNAM is a passive device; therefore, optical and electrical specifications and default thresholds do not apply.
Table 6-1 lists environmental specifications for the DNAM during operating conditions
Table 6-1 DNAM Environmental Specifications
Item | Specification |
---|---|
Short term operating temperature |
|
Short term operating relative humidity (per Telcordia GR-63-Core, NEBS level 3) |
The DNAM consists of one NAM dummy board with a dummy front panel.
Table 6-2 lists DNAM mechanical specifications.
This section explains how to remove and replace the DNAM. The replacement module and any supplies, such as tagging materials, should be present on site before beginning the removal and replacement procedures.
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. |
To replace to DNAM module, complete the following procedure:
1. Remove the Dummy Network Adaptation Module from an ONS 15252 MCU
2. Replace the Dummy Network Adaptation Module in an ONS 15252 MCU
The DNAM is installed in the ONS 15252 MCU just above the passive optical shelf.
Figure 6-2 shows DNAM placement in the MCU.
Warning Follow proper safety procedures when removing modules without switching off the relevant subrack. |
Step 2 Remove the DNAM by pulling it out along the slot.
This section describes how to replace a DNAM module in a ONS 15252 MCU.
Warning Follow proper safety procedures when removing modules without switching off the relevant subrack. |
Step 2 Slide the DNAM into the slot. Take care not to damage the optical fiber.
Step 3 Using a slot or Phillips screwdriver, tighten the retaining screw securing the DNAM in the ONS 15252 MCU.
Posted: Thu Apr 17 15:18:25 PDT 2003
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