Juniper EX9214 Hardware Manual
Download Hardware manual of Juniper EX9214 Network Router, Switch for Free or View it Online on All-Guides.com.
Brand: Juniper
Category: Network Router , Switch
Type: Hardware manual for Juniper EX9214
Pages: 372
Table 48: Grounding Cable Specifications
Quantity and SpecificationCable Type
One 6 AWG (13.3 mm
2
), minimum 60°C wire, or one that
complies with the by the local code
For DC-powered EX9214 switches, the 48 VDC facility must
be equipped with a circuit breaker rated 40 A (–48 VDC), or
60 A (–48 VDC), and the grounding cablemust be minimum
10 AWG, or one that complies with the by the local code.
Grounding
WARNING: The switch is pluggable type A equipment installed in a
restricted-access location. It has a separate protective earthing terminal
(sized for UNC 1/4-20 ground lugs) provided on the chassis in addition to the
grounding pin of the power supply cord. This separate protective earthing
terminal must be permanently connected to earth.
Related
Documentation
EX9204 Switch Hardware Overview•
• EX9208 Switch Hardware Overview
• EX9214 Switch Hardware Overview on page 3
Calculating the EX Series Switch Fiber-Optic Cable Power Budget
Calculate the link's power budget when planning fiber-optic cable layout and distances
to ensure that fiber-optic connections have sufficient power for correct operation. The
power budget is the maximum amount of powerthe link can transmit. When you calculate
the power budget,you use a worst-case analysis to provide a margin of error, even though
all the parts of an actual system do not operate at the worst-case levels.
To calculate the worst-case estimate for fiber-optic cable power budget (P
B
) for the
link:
1. Determine values for the link's minimum transmitter power (P
T
) and minimum receiver
sensitivity (P
R
). For example, here, (P
T
) and (P
R
) are measured in decibels, and
decibels are referred to one milliwatt (dBm).
P
T
= –15 dBm
P
R
= –28 dBm
NOTE: See the specifications for your transmitter and receiver to find the
minimum transmitter power and minimum receiver sensitivity.
2. Calculate the power budget (P
B
) by subtracting (P
R
) from (P
T
):
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EX9214 Switch Hardware Guide