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Optical ILA Site Guidelines and Requirements

 

Optical ILA Environmental Requirements and Specifications

The optical ILA must be installed in a rack or cabinet. It must be housed in a dry, clean, well-ventilated, and temperature-controlled environment.

Follow these environmental guidelines:

  • The site must be as dust-free as possible, because dust can clog air intake vents and filters, reducing the efficiency of the optical ILA cooling system.

  • Maintain ambient airflow for normal optical ILA operation. If the airflow is blocked or restricted, or if the intake air is too warm, the chassis might overheat, leading to the optical ILA temperature monitor shutting down the device to protect the hardware components.

Table 1 provides the required environmental conditions for normal operation of the optical ILA .

Table 1: Optical ILA Environmental Tolerances

Description

Tolerance

Altitude

No performance degradation up to 6000 feet (1828.8 meters).

Relative humidity

Normal operation ensured in relative humidity range of 5% through 90%, noncondensing.

  • Short-term operation ensured in relative humidity range of 5% through 93%, noncondensing.

    Note: As defined in NEBS GR-63-CORE, Issue 3, short-term events can be up to 96 hours in duration but not more than 15 days per year.

Temperature

  • Normal operation ensured in temperature range of 41° F (5° C) through 104 F (40° C). Short-term temperature is 23° F (–5° C) through 131 F (55° C)

  • Nonoperating storage temperature in shipping container: –40°F (40° C) through 158° F (70° C).

Seismic

Designed to comply with Zone 4 earthquake requirements per NEBS GR-63-CORE, Issue 3.

Note

Install the optical ILA only in restricted-access areas, such as dedicated equipment rooms and equipment closets, in accordance with Articles 110-16, 110-17, and 110-18 of the National Electrical Code, ANSI/NFPA 70.

Optical ILA Clearance Requirements for Airflow and Hardware Maintenance

When planning the site for an optical ILA installation, you must allow sufficient clearance around the installed chassis (see Figure 1).

Figure 1: Clearance Requirements for Airflow and Hardware Maintenance for an Optical ILA
Clearance Requirements for
Airflow and Hardware Maintenance for an Optical ILA

Follow these guidelines:

  • For the cooling system to function properly, the airflow around the chassis must be unrestricted. See Optical ILA Cooling System Description for more information about the airflow through the chassis.

  • If you are mounting an optical ILA in a rack or cabinet with other equipment, ensure that the exhaust from other equipment does not blow into the intake vents of the optical ILA chassis.

  • You must leave at least 24 in. (61 cm) both in front of and behind the optical ILA. For service personnel to remove and install hardware components, you must leave adequate space at the front and back of the optical ILA. NEBS GR-63 recommends that you allow at least 30 in. (76.2 cm) in front of the rack or cabinet and 24 in. (61 cm) behind the rack or cabinet.

Optical ILA Physical Specifications

Table 2 lists the physical specifications for the optical ILA chassis and components.

Table 2: Physical Specifications for the Optical ILA

Model Numbers

Fans and Power

Height

Width

Depth

Weight

PTX-ILA-M-AC

3 fan modules and 2 AC power supplies installed

1.72 in. (4.36 cm)

17.24 in. (43.8 cm)

9.6 in. (24.4 cm) without handles for fans or power supplies.

With field-replaceable units (FRUs) installed: 11.7 lb (5.30 kg)

PTX-ILA-M-DC

3 fan modules and 2 DC power supplies installed

1.72 in. (4.36 cm)

17.4 in. (44.19 cm)

9.8 in. (24.89 cm) without handles for fans or power supplies.

With FRUs installed: 11.8 lb (5.35 kg)

Optical ILA Rack Requirements

The optical ILA chassis is designed to be installed in two-post or four-post racks.

Rack requirements consist of:

  • Rack type

  • Mounting bracket hole spacing

  • Rack size and strength

Table 3 provides the rack requirements and specifications for the optical ILA.

Table 3: Rack Requirements for the Optical ILA

Rack Requirement

Guidelines

Rack type: two-post or four-post

Use a two-post or four-post rack that provides bracket patterns spaced at 1-U (1.75 in. or 4.45 cm) increments and that meets the size and strength requirements to support the weight.

A U is the standard rack unit defined in Cabinets, Racks, Panels, and Associated Equipment (document number EIA-310–D) published by the Electronics Components Industry Association (http://www.ecianow.org/).

Mounting bracket hole spacing

The holes in the mounting brackets are spaced at 1.25 in. (or 3.17 cm), so that the optical ILA can be mounted in any rack that provides holes spaced at that distance.

Rack size and strength

  • Ensure that the rack complies with the standards for a 19-in. or 23-in. rack as defined in Cabinets, Racks, Panels, and Associated Equipment (document number EIA-310–D) published by the Electronics Components Industry Association (http://www.ecianow.org/).

  • Ensure that the rack rails are spaced widely enough to accommodate the optical ILA chassis. The outer edges of the front-mounting brackets extend the width to 19 in. (48.26 cm).

  • Ensure that the front and rear rack rails are spaced between 28 in. (71.1 cm) and 36 in. (91.4 cm) front-to-back.

  • Ensure that the rack is strong enough to support the weight of the optical ILA.

  • Ensure that the spacing of rails and adjacent racks allows for proper clearance around the optical ILA and rack.

Rack connection to building structure

  • Secure the rack to the building structure.

  • If earthquakes are a possibility in your geographical area, secure the rack to the floor.

  • Secure the rack to the ceiling brackets as well as wall or floor brackets for maximum stability.

Optical ILA Cabinet Requirements

You can mount optical ILA models in a cabinet that contains a two-post 19-in. or four-post rack as defined in Cabinets, Racks, Panels, and Associated Equipment (document number EIA-310-E) published by the Electronics Components Industry Association (http://www.ecianow.org/).

Cabinet requirements consist of:

  • Cabinet size and clearance

  • Cabinet airflow requirements

Table 4 provides the cabinet requirements and specifications for the optical ILA.

Table 4: Cabinet Requirements for the Optical ILA

Cabinet Requirement

Guidelines

Cabinet size and clearance

The minimum cabinet size for accommodating an optical ILA is 18 in. (45.7 cm) deep. Large cabinets improve airflow and reduce the chance of overheating.

Note: The DC version of the optical ILA conforms to the ETSI 300 mm cabinets.

Cabinet airflow requirements

When you mount the optical ILA in a cabinet, ensure that ventilation through the cabinet is sufficient to prevent overheating.

  • Ensure that the cool air supply you provide through the cabinet adequately dissipates the thermal output of the optical ILA (and other installed equipment).

  • Ensure that the cabinet allows the hot exhaust air of the chassis to exit the cabinet without recirculating into the optical ILA. An open cabinet (without a top or doors) that employs hot air exhaust extraction from the top allows the best airflow through the chassis. If the cabinet contains a top or doors, perforations in these elements assist with removing the hot air exhaust.

  • Install the optical ILA in the cabinet in a way that maximizes the open space on the field-replaceable unit (FRU) side of the chassis. This maximizes the clearance for critical airflow. The optical ILA exhausts hot air through the fans and power supplies.

  • Route and dress all cables to minimize the blockage of airflow to and from the optical ILA.

  • Ensure that the spacing of rails and adjacent cabinets allows for the proper clearance around the optical ILA and cabinet.

Optical Specifications for the Optical ILA

Table 5 provides the optical specifications for the optical ILA.

Table 5: Optical Specifications

Parameter

Configurations

Minimum

Maximum

Input power range

Loaded system (96 channels)

–15.2 dBm

9.8 dBm

Single channel

–35 dBm

–10 dBm

Signal output power range

Loaded system (96 channels)

19.8 dBm

Single channel

0 dBm

Gain range (standard)

Output gain tilt equal to 0 dB

10 dB

30 dB

Gain range (extended)

Output gain tilt not equal to 0

30 dB

35 dB