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T640 Rack Requirements

 

The T640 Core Router can be installed in a rack or cabinet. Many types of racks are acceptable, including four-post (telco) racks and open-frame racks. An example of an open-frame rack is shown in Figure 1.

The router is designed for installation in a 19-in. rack as defined in Cabinets, Racks, Panels, and Associated Equipment (document number EIA-310-D) published by the Electronics Industry Association.

With the use of adapters, the router is designed to fit into a 600-mm-wide 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). Use approved wing devices to narrow the opening between the rails.

The rack rails must be spaced widely enough to accommodate the router chassis's external dimensions: 37.45 in. (95.1 cm) high, 31 in. (78.7 cm) deep, and 17.43 in. (44.3 cm) wide. The outer edges of the mounting brackets extend the width to 19 in. (48.3 cm). The spacing of rails and adjacent racks must also allow for the clearances around the router and rack that are specified in T640 Clearance Requirements for Airflow and Hardware Maintenance .

The chassis height of 37.45 in. (95.1 cm) is approximately 21.4 U. 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. You can stack two routers in a rack that has at least 42.8 U (74.9 in. or 1.90 m) of usable vertical space.

The rack must be strong enough to support the weight of the fully configured router, up to approximately 565 lb (256.3 kg). If you stack two fully configured routers in one rack, it must be capable of supporting about 1130 lb (512.6 kg).

Figure 1: Typical Open-Frame Rack
Typical Open-Frame Rack

Always secure the rack to the structure of the building. If your geographical area is subject to earthquakes, bolt the rack to the floor. For maximum stability, also secure the rack to ceiling brackets.