Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?

Navigation
Guide That Contains This Content
[+] Expand All
[-] Collapse All

    NSM4000 Appliance Rack Requirements

    The NSM4000 appliance can be installed in a rack. Many types of racks are acceptable, including front-mount racks and two-post (telco) racks.

    Table 1 provides the details of requirements for rack size, clearance, airflow, spacing of mounting brackets and flange holes, and connecting to the building structure.

    Table 1: Rack Requirements for the NSM4000 Appliance

    Rack Requirement

    Specifications

    Size

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

    A 600-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 wider than the appliance’s mounting brackets, which measure 19 in. (48.3 cm) from outer edge to outer edge. Use approved wing devices to narrow the opening between the rails as required.

    Clearance

    • The outer edges of the mounting brackets extend the width of either chassis to 19 in. (48.3 cm).
    • The front of the chassis extends approximately 0.5 in. (1.27 cm) beyond the mounting ears.

    Spacing of mounting bracket and flange holes

    • The holes within each rack set are spaced at 2-U [3.5 in. (8.9 cm)]. Therefore, the appliance can be mounted in a rack that provides holes or hole patterns spaced at 2-U [3.5 in. (8.9 cm)] increments, or in a rack that provides holes or hole patterns spaced at 1-U [1.75 in. (4.5 cm)] increments as long as there is 2x1-U space available in the rack.
    • The mounting brackets and front-mount flanges used to attach the chassis to a rack are designed to fasten to holes spaced at rack distances of 2-U [3.5 in. (8.9 cm)] increments, or in a rack that provides holes or hole patterns spaced at 1-U [1.75 in. (4.5 cm)] increments as long as there is 2x1-U space available in the rack.
    • The mounting holes in the mounting brackets provided with the device are spaced 1.25 in. (3.2 cm) apart (top and bottom mounting holes).

    Connecting to the building structure

    Always secure the rack in which you are installing the appliance 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.

    Published: 2014-10-30