Testing Services for the Telecommunications Industry
Southwest Research Institute (SwRI) performs Bellcore Network
Equipment-Building System (NEBS) type compliance testing to aid industry in providing
highly reliable telecommunications service to the consumer so that continuous operation is
assured during emergency calls for police, fire, and medical service, even in the
geographical areas prone to natural disasters such as earthquakes.
SwRI has received accreditation by OSHA as a Nationally
Recognized Testing Laboratory (NRTL). This accreditation includes testing and third-party
quality assurance services. SwRI has decades of experience and extensive facilities to
provide independent, comprehensive testing and engineering services to the
SwRI provides the following services and facilities to
telecommunications equipment manufacturers and operating companies worldwide:
- Laboratory Earthquake Simulation
Using a 10-inch stroke, biaxial, hydraulic actuated earthquake
simulator with computer control, SwRI runs synthesized waveforms like the Bellcore
GR-063-CORE VERTEQII acceleration time history or synthesized random drive signals to meet
required Shock Response Spectra (methods described in IEEE 344 and IEC 68-3-3).
Equipment is mounted atop the SwRI seismic facility
and exposed to a simulated earthquake environment.
- Fire Performance Evaluation
Equipment, cable assemblies, and materials are evaluated to
obtain fire hazard characterization, extinguishability criteria, and fire spread criteria.
SwRI evaluates burning process, fire endurance and spread,
combustible material fuel load, extinguishing properties, heat release measurement,
qualitative/quantitative smoke measurement, combustion gas analysis, and smoke
- Electromagnetic Compatibility (EMC) Evaluation
SwRI engineers conduct EMC evaluations for conducted, radiated,
electromagnetic emissions (EME), and electromagnetic interference (EMI) using screen
rooms, anechoic chambers, and an open-air test site as required by GR-1089-CORE.
SwRI engineers evaluate effects of electrostatic discharge to
equipment, equipment grounding, and equipment immunity to power transients.
A gas line burner is inserted into equipment to
initiate fire simulating electrical shorting, and extinguishability is evaluated.
- In Situ Measurement of Acoustic Intensity
Sound power levels or sound pressure are established using one
of the SwRI anechoic chambers to evaluate equipment acoustic noise emissions.
Sound intensity techniques are used to characterize
Equipment performance is evaluated under various combined
temperature, humidity, and altitude conditions experienced during storage, transport, and
Equipment is placed in environmental chambers to
evaluate performance in various temperature and humidity conditions.
Equipment is exposed to shock and vibration experienced during
transport, installation, and normal operation.
Equipment packaging is evaluated for effectiveness in
transport by exposing it to simulated vibration and shock on electrodynamic shakers.
Other related capabilities at SwRI include:
- Structural analysis and verification
- Federal Communications Commission (FCC) compliance testing
- Thermal analysis and laboratory validation
- Fluid flow analysis and laboratory validation
- Component design
- Failure analysis
- Plant and machinery noise and vibration control
- Materials research and evaluation
- Natural environments simulation
SwRI has performed physical environmental testing for the past
two decades for commercial industries and the military, meeting MIL-Specs and widely
recognized standards of the IEEE, ANSI, ASTM, ISO, and others. Over the last decade,
services have been provided to meet telecommunications standards and specifications like
Bellcore, ETSI, IEC, ISO, and others. Quality systems are in place at SwRI to comply with
ISO 9001, ISO 9002, and ISO Guide 25.
Equipment used to perform testing activities is calibrated with
traceability to the National Institute of Standards and Technology (NIST) and controlled
to comply with a MIL-S-45662 and ISO Guide 25 calibration system.
Test personnel are qualified and certified to perform
activities complying with stringent nuclear and DOD/NASA quality assurance programs.
For more information about Testing Services for the
Telecommunications Industry, contact Tim Fey,
Mechanical Engineering Division, Southwest
Research Institute, P.O. Drawer 28510, San Antonio, Texas 78228-0510, Phone (210)
522-3253, Fax (210) 522-4506, or visit
Mechanical Engineering Division