Juniper SSG 20-WLA, Руководство по установке и настройке оборудования

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Back Panel
„ 9
Antennae Types
The SSG 20-WLAN device supports three types of custom-built radio antennae:
„ Diversity antennae — The diversity antennae provide 2dBi omnidirectional
coverage and a fairly uniform level of signal strength within the area of
coverage and are suitable for most installations. this type of antennae are
shipped with the device.
„
External omnidirectional antenna — The external antenna provides 2dBi
omnidirectional coverage. Unlike diversity antennae, which function as a pair,
an external antenna operates to eliminate an echo effect that can sometimes
occur from slightly delayed characteristics in signal reception when two are in
use.
„ External directional antenna — The external directional antenna provides
2dBi unidirectional coverage and is well suited for such places as hallways and
outer walls (with the antenna facing inward).
Universal Serial Bus (USB) Host Module
The slot labeled USB on the back panel of an SSG 20 device implements a host-only
USB 1.1 host module for a USB device adapter or USB flash key, as defined in the
CompactFlash Specification
published by the CompactFlash Association. When the
USB storage device is installed and configured, it automatically acts as a secondary
storage device.
The USB host module allows file transfers, such as device configurations, user
certifications, and update version images between an external USB flash key and
the internal flash storage located in the security device. The USB host module
supports USB 2.0 specification at either low-speed (1.5M) or full-speed (12M) file
transfer.
To use a USB flash key to transfer files between the device, perform the following
steps:
1. Insert the USB flash key into the USB host module on the security device.
2. Save the files from the USB flash key to the internal flash storage on the device
with the
save { software | config | image-key } from usb filename to flash CLI
command.
3. Before removing the USB flash key, stop the host module with the exec
usb-device stop CLI command.
4. It is now safe to remove the USB flash key.
If you want to delete a file from the USB flash key, use the delete file usb:/filename
CLI command.
If you want to view the saved file information on the USB flash key or internal flash
storage, use the
get file info CLI command.