Cabling recommendations, Cabling recommendations -8, S. see – Juniper Networks E-Series User Manual
Page 54
CHAPTER 3
Installation Guidelines and Requirements
3-8
Cabling Recommendations
You may want to consult the document
GR-63 (LSSGR, FD-15): Network
Equipment Building System (NEBS) Requirements: Physical Protection,
Issue 1, October 1995
for additional cable recommendations.
Comply with the following recommendations:
•
Use only shielded cables.
•
Ensure that cable distance and rate limits meet IEEE-recommended
maximum speeds and distances for signaling purposes. For
information about attenuation and power loss in optical fiber cables
see:
>
ANSI T1.646a-1997 Telecommunications – Broadband ISDN -
Physical Layer Specification for User-Network Interfaces Including
DS1/ATM (1997)
>
ANSI T1.646-1995 Telecommunications – Broadband ISDN -
Physical Layer Specification for User-Network Interfaces Including
DS1/ATM (1995)
>
AT&T (Lucent) Technical Note Power Margin Analysis (November
1995)
•
Ensure that power cables deliver sufficient power to the system.
•
Attach laser fiber connectors only to Class 1 laser devices in
accordance with
IEC 825-1, Safety of Laser Products - Part 1
.
•
Route cables so that they do not restrict ventilation or airflow.
•
Route cables so that modules and field-replaceable units are easily
accessible.
•
Route cables in a logical direction to prevent loss of connectivity to
other equipment in the rack, associated equipment in adjacent racks,
or to the backbone network.
•
Consider using cable-management brackets to keep network cables
untangled and orderly and to prevent cables from hindering access to
other slots.
•
For specifications on cables for line modules, see
.