Juniper Networks NetScreen-5GT Wireless Manual Del Usuario página 12

Chapter 1 Connecting the Device
On the NetScreen-5GT Wireless ADSL device, the ADSL line is your primary connection
to an outside network. For a backup data link to an outside network, you can either
connect an Ethernet cable from the Untrusted port on the NetScreen-5GT Wireless ADSL
device to an external router or a DSL, or cable modem, or you can connect a serial cable
from the Modem port on the device to an external modem.
Warning: You cannot connect both the Untrusted port and the Modem port on the device
to an outside network at the same time.
Connecting Splitters and Microfilters
A signal splitter divides the telephone signal into low-frequency voice signals for voice
calls and high-frequency data signals for data traffic. Your service provider usually
installs the splitter as part of the equipment that connects your site telephone lines to the
provider network.
There are also splitters that you may be able to install yourself, depending upon your
service provider equipment. If you are installing such a splitter yourself, connect the
ADSL cable from the NetScreen device and the telephone line to the appropriate
connectors (for example, "data" or "voice") on the splitter. You connect the other end of the
splitter to the telephone outlet.
You may need to install a microfilter on each telephone, fax machine, answering machine,
or analog modem that connects to the ADSL line. The microfilter filters out high-
frequency noise on the telephone line. You install the microfilter on the telephone line
between the telephone, fax machine, answering machine, or analog modem and the voice
connector on the splitter.
The following shows an example of a microfilter and a splitter that you install on your
site. (You must obtain the appropriate microfilters or splitters from your service provider.)
8
ADSL Cable
Telephone Outlet
Splitter
Microfilter
User's Guide