P
M
= 13 dB – 8 km (0.5 dB/km) – 7(0.5 dB)
P
M
= 13 dB – 4 dB – 3.5 dB
P
M
= 5.5 dB
In both examples, the calculated power margin is greater than zero, indicating that the
link has sufficient power for transmission and does not exceed the maximum receiver
input power.
Related
Documentation
Supported Network Interface Standards by Transceiver
•
•
Understanding Fiber-Optic Cable Signal Loss, Attenuation, and Dispersion on page 347
T4000 Routing Engine Interface Cable Specifications
Table 53 on page 350
lists the specifications for the cables that connect to the
management ports on the connector interface panel (CIP).
Table 53: Cable Specifications for Routing Engine Management
Router
Receptacle
Maximum
Length
Cable/Wire Supplied
Cable Specification
Port
DB-9 male
6 ft (1.83 m)
One 6-ft (1.83-m)
length with
DB-9/DB-9
connectors
RS-232 (EIA-232)
serial cable
Routing Engine
console or
auxiliary
interface
RJ-45
autosensing
328 ft
(100 m)
One 15-ft (4.57-m)
length with
RJ-45/RJ-45
connectors
Category 5 cable or
equivalent suitable
for 100Base-T
operation
Routing Engine
Ethernet
interface
Related
Documentation
T4000 Connector Interface Panel (CIP) Description on page 27
•
•
Connecting the T4000 Router to a Management Ethernet Device on page 118
•
Connecting the T4000 Router to a Management Console or Auxiliary Device on page 112
•
DB-9 Connector Pinouts for the Routing Engine AUXILIARY and CONSOLE Ports on
page 351
•
RJ-45 Connector Pinouts for the T4000 Management ETHERNET Port on page 351
T4000 Alarm Relay Contact Wire Specifications
For management and service operations, you can connect the router to external
alarm-reporting devices through the alarm relay contacts on the CIP. You must provide
a wire with gauge between 28-AWG and 14-AWG (0.08 and 2.08 mm
2
).
Related
Documentation
T4000 Connector Interface Panel (CIP) Description on page 27
•
Copyright © 2013, Juniper Networks, Inc.
350
T4000 Router Hardware Guide
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