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)
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 the ERX Module Guide.
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.
