Juniper CBL-M40-PWR-AU ユーザーズマニュアル
Prepare the Site
Site Electrical Wiring and Cable Guidelines
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Site Electrical Wiring and Cable Guidelines
When planning the electrical wiring and cabling at your site, consider the factors discussed in
the following sections.
the following sections.
Distance Limitations for Signaling
Improperly installed wires can emit radio interference. In addition, the potential for damage
from lightning strikes increases if wires exceed recommended distances, or if wires pass
between buildings. The electromagnetic pulse (EMP) caused by lightning can damage
unshielded conductors and destroy electronic devices. If your site has previously experienced
such problems, you might want to consult experts in electrical surge suppression and
shielding.
from lightning strikes increases if wires exceed recommended distances, or if wires pass
between buildings. The electromagnetic pulse (EMP) caused by lightning can damage
unshielded conductors and destroy electronic devices. If your site has previously experienced
such problems, you might want to consult experts in electrical surge suppression and
shielding.
Radio Frequency Interference
You can reduce or eliminate the emission of radio frequency interference (RFI) from your site
wiring by using twisted-pair cable with a good distribution of grounding conductors. If you
must exceed the recommended distances, use a high-quality twisted-pair cable with one
ground conductor for each data signal when applicable.
wiring by using twisted-pair cable with a good distribution of grounding conductors. If you
must exceed the recommended distances, use a high-quality twisted-pair cable with one
ground conductor for each data signal when applicable.
Electromagnetic Compatibility
If your site is susceptible to problems with electromagnetic compatibility (EMC), particularly
from lightning or radio transmitters, you might want to seek expert advice. Strong sources of
electromagnetic interference (EMI) can destroy the signal drivers and receivers in the router
and conduct power surges over the lines into the equipment, resulting in an electrical hazard.
It is particularly important to provide a properly grounded and shielded environment and to
use electrical surge-suppression devices.
from lightning or radio transmitters, you might want to seek expert advice. Strong sources of
electromagnetic interference (EMI) can destroy the signal drivers and receivers in the router
and conduct power surges over the lines into the equipment, resulting in an electrical hazard.
It is particularly important to provide a properly grounded and shielded environment and to
use electrical surge-suppression devices.
Fiber-Optic and Network Cable Guidelines
The router supports PICs that use various kinds of network cable, including multimode and
single-mode fiber-optic cable. For information about the type of cable used by each PIC, see
the M20 and M40 Internet Routers PIC Guide.
single-mode fiber-optic cable. For information about the type of cable used by each PIC, see
the M20 and M40 Internet Routers PIC Guide.
For more information about fiber-optic cable, see the following sections: