Chapter 6, Dummy Network Adaptation Module

Dummy Network Adaptation Module
6.1 Functional Description
6.2 Technical Specifications

6.2.1 Environmental Specifications

6.2.2 Mechanical Specifications

6.3 Removing and Replacing a DNAM

Remove the Dummy Network Adaptation Module from an ONS 15252 MCU

Replace the Dummy Network Adaptation Module in an ONS 15252 MCU

Dummy Network Adaptation Module

This chapter describes the Dummy Network Adaptation module (DNAM).

6.1 Functional Description

This section provides a description of the DNAM, which is illustrated in Figure 6-1.

Figure 6-1 DNAM side view

The DNAM fills the empty space (if any exists) in the ONS 15200 Multichannel Unit (MCU) between the NAM modules and the Communication Interface module (CIM). The DNAM is passive and does not include alarm or supervisory subunit functions, or front-panel indicators, connectors, or adjustments. In case of unequipped NAM slots, the DNAM ensures fulfillment of EMC requirements.

6.2 Technical Specifications

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.

6.2.1 Environmental Specifications

Table 6-1 lists environmental specifications for the DNAM during operating conditions.

Table 6-1 DNAM Environmental Specification

Item	Specification
Normal operating temperature Short term operating temperature for equipment shelves (per GR-63, NEBS level 3)	+5°C to +40°C (41°F to 104°F) -5°C to +55°C (23°F to 131°F)
Rate of temperature change	30°C/h (54°F/h)
Normal operating relative humidity Short term operating relative humidity (per GR-63, NEBS level 3)	5 to 85%, but not to exceed 0.024 kg water per kg dry air 5 to 90%, but not to exceed 0.024 kg water per kg dry air

Item

Specification

Normal operating temperature

Short term operating temperature
for equipment shelves
(per GR-63, NEBS level 3)

+5°C to +40°C (41°F to 104°F)

-5°C to +55°C (23°F to 131°F)

Rate of temperature change

30°C/h (54°F/h)

Normal operating relative humidity

Short term operating relative humidity (per GR-63, NEBS level 3)

5 to 85%, but not to exceed 0.024 kg water per kg dry air

5 to 90%, but not to exceed 0.024 kg water per kg dry air

6.2.2 Mechanical Specifications

The DNAM consists of one Network Adaptation module (NAM) dummy board with a dummy front panel.

Table 6-2 lists DNAM mechanical specifications.

Table 6-2 DNAM Mechanical Specifications

Item	Specification
Height	96 mm (3.8 in.)
Width	25.4 mm (1.0 in.)
Depth	234 mm (9.2 in.)
Weight	0.12 kg (0.26 lbs.)

6.3 Removing and Replacing a DNAM

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.

Warning The ONS 15252 Multichannel Unit (MCU) is energized with -48 VDC power.

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.

Remove the Dummy Network Adaptation Module from 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.

Figure 6-2 Location of the DNAM in an ONS 15252

Step 1 Using a slot or Phillips screwdriver, remove the screw securing the DNAM to the ONS 15252 MCU.

Step 2 Remove the DNAM by pulling it out along the slot.

Replace the Dummy Network Adaptation Module in an ONS 15252 MCU

Warning Follow proper safety procedures when removing modules without switching off the relevant subrack.

Step 1 Place the DNAM into the ONS 15252 MCU slot by aligning the card edge with the upper and lower guiding rails. The lower guiding rail is shorter and may require more care in alignment.

Step 2 Slide the DNAM into the backplane. 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.

Table of Contents

Dummy Network Adaptation Module

6.1 Functional Description

6.2 Technical Specifications

6.2.1 Environmental Specifications

6.2.2 Mechanical Specifications

6.3 Removing and Replacing a DNAM

Remove the Dummy Network Adaptation Module from an ONS 15252 MCU

Replace the Dummy Network Adaptation Module in an ONS 15252 MCU