Cabling The Srp Ioa - Juniper E SERIES BROADBAND SERVICES ROUTERS 11.3.X - E120 AND E320 HARDWARE GUIDE REV 9-29-2010 Hardware Manual

Cabling the SRP IOA

Copyright © 2010, Juniper Networks, Inc.
Consider the distance from the connection point and the configuration of the system
when determining the size of wire used.
See "System Specifications" on page 89 for more information on router specifications.
Table 6: Required Cables
Connection
Management connection between SRP
IOA and the LAN
Management connection between SRP
IOA and a management console
Direct connections to IOAs
Before powering up the router, you must set up a management console. The console
enables you to communicate with your system during the power-up process and to
manage your system using the command-line interface (CLI).
When connecting a console directly to the SRP IOA, use a cable appropriate for your
terminal connector. The cable must have a female DB-9 connector to attach to the
RS-232 port on the SRP IOA. See Figure 26 on page 48.
The console port is considered a data terminal equipment interface (DTE). Direct
connection to a terminal or PC (which also have DTE interfaces) requires a crossover
cable.
The router has network timing ports and management ports located on the SRP IOA.
See Figure 26 on page 48 and Table 7 on page 47 for details on each component.
Table 7: SRP IOA Ports
Port Description
Network timing Two dual-purpose BNC connectors for BITS timing clock sources (E1 or
ports T1)
User-configurable through the CLI
Primary (A) and secondary (B)
75-ohm E1 2.048-Mbps/T1 1.544–Mbps inputs terminating with a 120/75
ohm or 100/75 ohm balun
Management ports One 10/100Base-T Ethernet management port with an RJ-45 connector
Two RS-232 ports with a DB-9 connector for direct CLI (Console) and
debug (Auxiliary) access.
The Auxiliary port is used to debug ports on a specific processor (SRP
module, LM).
Chapter 5: Cabling the Router
Port and Cable Used
One 10/100Base-T Ethernet management port with
an RJ-45 connector
One RS-232 port with a DB-9 connector for VT100
management access
See the E120 and E320 Module Guide for specific IOA
connector information
47