Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?

ACX4000 Site Guidelines and Requirements

 

General Site Guidelines

Efficient device operation requires proper site planning and maintenance and proper layout of the equipment, rack or cabinet (if used), and wiring closet.

To plan and create an acceptable operating environment for your device and prevent environmentally caused equipment failures:

  • Keep the area around the chassis free from dust and conductive material, such as metal flakes.

  • Follow prescribed airflow guidelines to ensure that the cooling system functions properly and that exhaust from other equipment does not blow into the intake vents of the device.

  • Follow the prescribed electrostatic discharge (ESD) prevention procedures to prevent damaging the equipment. Static discharge can cause components to fail completely or intermittently over time.

  • Install the device in a secure area, so that only authorized personnel can access the device.

QFX5120 Site Electrical Wiring Guidelines

Table 1 describes the factors you must consider while planning the electrical wiring at your site.

Warning

It is particularly important to provide a properly grounded and shielded environment and to use electrical surge-suppression devices.

Table 1: Site Electrical Wiring Guidelines

Site Wiring Factor

Guidelines

Signaling limitations

If your site experiences any of the following problems, consult experts in electrical surge suppression and shielding:

  • Improperly installed wires cause radio frequency interference (RFI).

  • Damage from lightning strikes occurs when wires exceed recommended distances or pass between buildings.

  • Electromagnetic pulses (EMPs) caused by lightning damage unshielded conductors and electronic devices.

Radio frequency interference

To reduce or eliminate RFI from your site wiring, do the following:

  • Use a twisted-pair cable with a good distribution of grounding conductors.

  • If you must exceed the recommended distances, use a high-quality twisted-pair cable with one ground conductor for each data signal when applicable.

Electromagnetic compatibility

If your site is susceptible to problems with electromagnetic compatibility (EMC), particularly from lightning or radio transmitters, seek expert advice.

Some of the problems caused by strong sources of electromagnetic interference (EMI) are:

  • Destruction of the signal drivers and receivers in the device

  • Electrical hazards as a result of power surges conducted over the lines into the equipment

Clearance Requirements for Airflow and Hardware Maintenance on ACX4000 Routers

When planning the installation site, allow sufficient clearance around the rack (see Figure 1):

  • For service personnel to remove and install hardware components, allow at least 2.16 in. (5.5 cm) in front of the router.

  • The rack or cabinet must have an adequate supply of cooling air.

  • Ensure that the cabinet allows the chassis hot exhaust air to exit from the cabinet without recirculating into the router.

  • When deploying the router in harsh environments where the router may operate between 131° F (55° C) and 149° F (65° C), allow a 1–rack unit (U) gap above and below the router.

  • Minimum 1 meter/second airflow in any direction

Figure 1: ACX4000 Chassis Dimensions and Clearance Requirements
ACX4000 Chassis Dimensions and Clearance
Requirements

Chassis Physical Specifications for ACX4000 Routers

The ACX4000 router is a rigid sheet-metal structure that houses the hardware components. Table 2 summarizes the physical specifications of the ACX4000 router.

Table 2: Physical Specifications of the ACX4000 Router Chassis

Description

Value

Height

4.375 in. (11.11 cm)

Width

  • 17.5 in. (44.5 cm)

  • 19.2 in. (48.7 cm) with mounting brackets attached

Depth

9.5 in. (24.13 cm)

Weight

16.98 lb (7.69 kg)

ACX4000 Router Environmental Specifications

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

Ensure that these environmental guidelines are followed:

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

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

Note

Depending on the ambient temperature, it may take up to 5 minutes for the router to heat up to the operating temperature.

Table 3 provides the required environmental conditions for normal router operation.

Table 3: Router Environmental Specifications

Description

Value

Altitude

No performance degradation to 10,000 ft (3048 m)

Relative humidity

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

Temperature

  • Harsh environment: –40°F (–40°C) to 149°F (65°C)

  • Central office environment: 23°F (–5°C) to 131°F (55°C)

Commercial grade SFP/SFP+ temperature

  • Harsh environment: –40°F (–40°C) to 122°F (50°C)

  • Central office environment: –40°F (–40°C) to 104°F (40°C)

Seismic

Designed to meet Telcordia Technologies Zone 4 earthquake requirements

Configuration

  • Harsh environment:

    • PoE Power: 65W each port (max spec)

    • 1GB ports: Full traffic

    • 10GB ports: Full traffic 1G ports

    • T1/E1 ports: Full traffic

    • SFP/SFP+: Extended temperature grade or industrial grade

  • Central office environment:

    • PoE Power: 30W each port (max spec)

    • 1GB ports: Full traffic

    • 10GB ports: Full traffic 1G ports

    • T1/E1 ports: Full traffic

    • SFP/SFP+: Extended temperature grade or industrial grade

Note

Install the router only in restricted 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.

Cabinet Requirements for ACX4000 Routers

You can mount the router in a cabinet that contains a 19-in. (48.3 cm) rack.

Cabinet requirements consist of:

  • Cabinet size

  • Clearance requirements

  • Cabinet airflow requirements

Table 4 provides the cabinet requirements and specifications for the router.

Table 4: Cabinet Requirements and Specifications for the ACX4000 Router

Cabinet Requirement

Guidelines

Cabinet size

  • You can mount the router in a cabinet that contains a 19-in. (48.3 cm) rack as defined in Cabinets, Racks, Panels, and Associated Equipment (document number EIA-310–D) published by the Electronics Industry Association (http://www.eia.org).

    Note: The rack must meet the strength requirements to support the weight of the router.

  • The minimum cabinet size must be able to accommodate the maximum external dimensions of the router.

Cabinet clearance

  • The outer edges of the mounting brackets extend the width of the chassis to 19 in. (48.3 cm).

  • The minimum total clearance inside the cabinet is 30 in. (76.2 cm) between the inside of the front door and the inside of the rear door.

Cabinet airflow requirements

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

  • Ensure an adequate cool air supply to dissipate the thermal output of the router or routers.

  • Ensure that the cabinet allows the chassis hot exhaust air to exit the cabinet without recirculating into the router. 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 router in the cabinet in a way that maximizes the open space on the side of the chassis that has the hot air exhaust. This space maximizes the clearance for critical airflow.

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

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

  • A cabinet larger than the minimum required provides better airflow and reduces the chance of overheating.

Rack Requirements for ACX4000 Routers

You can mount the router on two-post racks or four-post racks.

Rack requirements consist of:

  • Rack type

  • Mounting bracket hole spacing

  • Rack size and strength

  • Rack connection to the building structure

Table 5 provides the rack requirements and specifications for the router.

Table 5: Rack Requirements and Specifications for the Router

Rack Requirement

Guidelines

Rack type

Use a two-post rack or a four-post rack. You can mount the router on any two-post or four-post rack that provides bracket holes or hole 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 Industry Association (http://www.eia.org).

The rack must meet the strength requirements to support the weight of the chassis.

Mounting bracket hole spacing

The holes in the mounting brackets are spaced at 1 U (1.75 in., or 4.45 cm) so that the router can be mounted in any rack that provides holes spaced at that distance.

Rack size and strength

  • Ensure that the rack complies with this standard:

    • A 19-in. (48.3 cm) rack as defined in Cabinets, Racks, Panels, and Associated Equipment (document number EIA-310-D) published by the Electronics Industry Association (http://www.eia.org).

  • Ensure that the rack rails are spaced widely enough to accommodate the router chassis' external dimensions . The outer edges of the front-mounting brackets extend the width of the chassis to 19.2 in. (48.7 cm).

  • The rack must be strong enough to support the weight of the router.

  • Ensure that the spacing of rails and adjacent racks allows for the proper clearance around the router 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 to the wall or floor brackets for maximum stability.

One pair of mounting brackets for mounting the router on two posts of a rack is supplied with each router. For mounting the router on four posts of a rack or cabinet, you can order a four-post rack-mount kit separately.