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Step 1: Prepare the Site for Installing an ACX5400 Router

 

Rack Requirements for ACX5400 Routers

The ACX5400 routers are designed to be installed on four-post racks.

Table 1 provides the rack requirements and specifications for ACX5400 routers.

Table 1: Rack Requirements for ACX5400 Routers

Rack Requirement

Guidelines

Rack type

Use a four-post rack that provides bracket holes or hole patterns spaced at 1-U increments (1.75 in. or 4.45 cm) and that the rack 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.

Mounting bracket hole spacing

Ensure that 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 the standards for a 19-in. rack as defined in Cabinets, Racks, Panels, and Associated Equipment (document number EIA-310–D) published by the Electronics Industry Association.

  • Use an 800-mm rack as defined in the four-part Equipment Engineering (EE) European telecommunications standard for equipment practice (document numbers ETS 300 119-1 through 119-4) published by the European Telecommunications Standards Institute (http://www.etsi.org).

    The horizontal spacing between the rails in a rack that complies with this standard is usually wider than the device's mounting brackets, which measure 19 in. (48.26 cm) from outer edge to outer edge. Use approved wing devices to narrow the opening between the rails as required.

  • 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 to 19 in. (48.26 cm).

  • Ensure that for four-post installations, the front and rear rack rails are spaced between 23.6 in. (60 cm) and 36 in. (91.4 cm) front-to-back.

  • Ensure that the rack is strong enough to support the weight of the router. The fully configured ACX5448 router weighs about 22.48 lb (10.2 kg), the ACX5448-D router weighs 23.14 lb (10.5 kg), and the ACX5448-M router weighs 26.12 lb (11.85 kg).

  • Ensure that the spacing of rails and adjacent racks allows for 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 wall or floor brackets for maximum stability.

Router Clearance Requirements

For the cooling system to function properly, the airflow around the chassis must be unrestricted. You must allow sufficient clearance around the installed chassis for cooling and maintenance.

If you are mounting an ACX5400 in a rack with other equipment, ensure that the exhaust from the other equipment does not blow into the intake vents of the ACX5400 chassis.

For service personnel to remove and install hardware components, and to accommodate the interface and power cable bend radius, there must be adequate space at the front and rear of the router. Allow at least 24 in. (61 cm) of space both at the front and the rear of the router. See Figure 12 for clearance requirements in ACX5448 and ACX5448-D routers and Figure 13 for clearance requirements in ACX5448-M routers.

Figure 12: Clearance Requirements for Airflow and Hardware Maintenance for ACX5448 and ACX5448-D Routers
Clearance Requirements for Airflow
and Hardware Maintenance for ACX5448 and ACX5448-D Routers
Figure 13: Clearance Requirements for Airflow and Hardware Maintenance for ACX5448-M Routers
Clearance Requirements
for Airflow and Hardware Maintenance for ACX5448-M Routers

Router Cooling and Airflow Requirements

  • The ACX5400 routers are available with either front-to-back airflow (airflow out, ports-to-FRUs, or AFO), or back-to-front airflow (airflow in, FRUs-to-ports, or AFI). In AFO models, the air is pulled through the front of the chassis toward the fan modules, from where it is exhausted out of the chassis. In AFI models, the air is pulled through the fan modules and toward the front of the chassis, from where it is exhausted out of the chassis. The fan modules and the power supply modules (PSMs) are available in both AFO and AFI variants. Figure 14 and Figure 15 show the airflow through the two router models.

  • For the cooling system to function properly, the airflow around the chassis must be unrestricted.

  • The PSMs are self-cooling and are located in the rear of the router. The exhaust for the PSMs are also located on the rear of the chassis.

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

Figure 14: Air Out Airflow (AFO) Through the ACX5400 Chassis
Air Out Airflow (AFO) Through
the ACX5400 Chassis
Figure 15: Air In Airflow (AFI) Through the ACX5400 Chassis
Air In Airflow (AFI) Through the
ACX5400 Chassis
Caution

Do not mix different types of airflow modules in the same chassis. The fan modules and PSMs must be of the same airflow type (AFO or AFI).

Tools Required to Prepare the ACX5400 Router for Installation

  • ESD grounding strap (not provided).

  • One pair of rear-mounting blades (provided). These mounting blades support the rear of the chassis and must be installed.

  • One pair of front-mounting rails, with mounting brackets attached at one end (provided). The mounting rails accommodate the mounting blades that slide into the rails.

  • Twelve screws to secure the mounting rails to the chassis (provided).

  • Eight screws to secure the chassis and mounting blades to the rack (not provided).

  • Appropriate screwdriver for the mounting screws (not provided).

  • Two power cords with plugs appropriate for your geographical location (provided).

  • RJ-45 cable and RJ-45 to DB-9 serial port adapter (provided).

  • Management host, such as a PC laptop, with a serial port (not provided).