363-206-285
Technical Specifications
Issue 3 June 2001
10-67
NOTE:
The mounting brackets on the DDM-2000 OC-3, OC-12, heat baffle, and
fan shelf are designed to allow for mounting in standard 23-inch wide
network bay frames and 23-inch wide EIA-type bay frames.
Environmental Specifications 10
Temperature and Humidity 10
A DDM-2000 OC-3 Multiplexer shelf meets Telcordia Technologies Network
Equipment Building System (NEBS
*
) requirements for use in CO environments
without fans.
A fan shelf is required in uncontrolled environments or cabinet applications either
above or below any DDM-2000 OC-3 shelf. Refer to ED-8C724-10, "Typical Bay
Arrangements," for detailed information on placement of fans and heat baffles in
typical bay arrangements.
The DDM-2000 OC-3 Multiplexer operates in uncontrolled environments at
temperatures of −40°Cto+75°C and humidity of 5 to 95 percent (noncondensing).
Forced convection cooling (fans) is required when the air inlet temperature is
above 50°C. The DDM-2000 OC-3 Multiplexer provides optional control and
alarming of the 2-type fan units used in Lucent cabinets and alarming of the
DDM-2000 fan shelf.
EMC Requirements 10
The DDM-2000 OC-3 Multiplexer has been tested and found to comply with the
limits for a Class A digital device, pursuant to Part 15 of the FCC rules. These
limits are designed to provide reasonable protection against harmful interference
when the equipment is operated in a commercial environment. This equipment
generates, uses, and can radiate radio-frequency energy, and if not installed and
used in accordance with the instruction manual, may cause harmful interference
to radio communications. Operation of this equipment in a residence is likely to
cause harmful interference in which case the user will be required to correct the
interference at the user's own expense.
*"
NEBS Generic Equipment Requirements
," TR-NWT-000063, Issue 4.
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