Cisco 7301 Technical Information PDF herunterladen (Seite 5)

• The rack-mount and cable-management kit:

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Two rack-mount brackets and one cable-management bracket

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Screws: Four 12-24 x 0.5-inch screws, four 8-18 x .37-inch screws for use with a 19-inch rack, four 8 x .375-inch screws

for use in a 21–23-inch rack, and one M4 x 20-mm screw

• T1 channel service unit/data service unit (CSU/DSU) that converts the High-Level Data Link Control (HDLC) synchronous

serial data stream into a T1 data stream with the correct framing and ones density to connect a serial port to a T1 network.

(Some telephone systems require a minimum number of 1 bits per time unit in a data stream, called ones density.) Several

T1 CSU/DSU devices are available as additional equipment, and most provide a V.35, EIA/TIA-449, or EIA-530 electrical

interface.

Prepare for Workbench or Tabletop Installation

For a workbench or tabletop installation, verify the following before installing the router:

• The router is off the floor and has adequate ventilation.

• An adequate chassis ground (earth) connection exists for the router.

• The router has at last 3 inches (7.62 cm) of clearance at the inlet and exhaust vents (sides of router).

• The router has 19 inches (48.3 cm) clearance at the front and rear to allow for CompactFlash Disk, SFP Gigabit Interface

Converter (GBIC) module, and port adapter replacement or installation, or to access cables or equipment.

• The port adapter filler panel is installed if a port adapter is not installed. The slot must not be empty.

For cable-management bracket installation instructions, see page 9.

Prepare for Rack-Mount Installation

Before you begin the rack-mounting tasks, decide whether or not you want to front- or rear-mount the chassis, decide whether

or not you want to attach the cable-management bracket, and determine the type of rack—four-post or two-post—that you will

be using.

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Cisco 7301 Technical Information Seite 5