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M120 Multiservice Edge Router Hardware Guide
Related
Documentation
Routing Engine Interface Cable and Wire Specifications for the M120 Router
Table 35: Routing Engine Interface Cable and Wire Specifications
Port
Cable Specification
Routing Engine console
RS-232 (EIA-232) serial cable
or auxiliary interface
Routing Engine
Category 5 cable or equivalent
Ethernet interface
suitable for 100Base-T operation
Alarm relay contacts
Wire with gauge between
24-AWG and 12-AWG (0.20 and
3.33 mm
Related
Documentation
246
All manuals and user guides at all-guides.com
P
= P
– LL
M
B
P
= 13 dB – 8 km (0.5 dB/km) – 7(0.5 dB)
M
P
= 13 dB – 4 dB – 3.5 dB
M
P
= 5.5 dB
M
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.
Fiber-Optic and Network Cable Specifications for the M120 Router on page 241
Attenuation and Dispersion in Fiber-Optic Cable on M Series, MX Series, and T Series
Routers on page 243
Calculating Power Budget for Fiber-Optic Cable for M Series, MX Series, and T Series
Routers on page 244
Signal Loss in Multimode and Single-Mode Fiber-Optic Cable for the M120 Router on
page 242
For management and service operations, you connect the Routing Engine to an external
console or management network. (For more information, see "M120 Routing Engine
Description" on page 18.)
Table 35 on page 246 lists the specifications for the cables that connect to management
ports and the wires that connect to the alarm relay contacts.
2
)
Replacing Connections to M120 Routing Engine Interface Ports on page 132
M120 Routing Engine Description on page 18
Cable/Wire Supplied
One 6-ft (1.83-m) length
with DB-9/DB-9
connectors
One 15-ft (4.57-m) length
with RJ-45/RJ-45
connectors
No
Copyright © 2010, Juniper Networks, Inc.
Maximum
Router
Length
Receptacle
6 ft (1.83 m)
DB-9 male
328 ft (100 m)
RJ-45
autosensing
None
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