Bourns has created the Telcordia GR-1089-CORE Issue 4 Topics series to help customers understand the changes in section 4 from Issue 3 to Issue 4. The series author, Mick Maytum, is Bourns standards representative on the IEC, ITU-T, IEEE, ATIS, JEDEC and TIA surge protection committees. Telcordia GR-1089-CORE Issue 4 Topics —. Use the Dymax Resource Library to search for documents such as PDS product data sheet, manuals, guides, product bulletins and more. Or request an SDS safety data sheets. Telcordia Technologies, Inc. — Enterprise License Restrictions. See restrictions on title page. Telcordia strictly prohibits the unauthorized distribution, download, or sale of this copyrighted material. For general information about this or any other Telcordia documents, please contact: Telcordia Customer Service One Telcordia Drive, Room 1B180. Bellcore/Telcordia Standards The Telcordia reliability prediction procedure has a long and distinguished history of use in the telecommunications and electronics industry. During the past fifteen years, four versions of the standard have been published. Bellcore TR-332 Issue 6 (1997). Telcordia SR-332 Issue 1 (2001).

The requirements of telcordia GR-487-CORE are intended to provide a suitable environment for telecommunication companies’ electronic and passive equipment that is housed in above ground cabinets or enclosures, typically pad- or pole-mounted, in an Outside Plant (OSP) environment. Although originally developed for wireline environments, many of the wireless carriers have adopted GR-487 as a standard for their wireless environments as well.

GR-3108-CORE provides the test criteria for the equipment inside of a cabinet or enclosure, and works in harmony with GR-487. In general, if a cabinet or enclosure includes electronic or telecommunication equipment, this equipment is expected to comply with the criteria contained in GR-3108 (unless the equipment is covered by a more specific GR).

Of special note for Original Equipment Manufacturers (OEMs), equipment evaluated to GR-3108 expects a GR-487 enclosure to provide a Class 2 Protected Environment (thermally managed interior space within an outdoor enclosure) or Class 3 Severe Outside Environment (interior space within an outdoor enclosure that is not sealed or thermally managed). Cabinets and enclosures evaluated to GR-487 are anticipated to be deployed in a Class 4 (directly exposed to outside weather conditions) environment.

Applicable Equipment

GR-487 covers cabinets and enclosures deployed in the Outside Plant (OSP) environment. The range of enclosures include; wireline electronic equipment cabinets (DSLAM, DLC, cross-connect), wireless cabinets (backhaul switches, battery backup, base station transceiver, E-911 Location Measurement Unit, power amplifiers), field retrofit & adjunct cabinets, and power pedestals (housing for AC commercial power, battery backup).

Note that when Purcell Systems states that specific enclosures and cabinets comply with GR-487, we have tested and passed all the applicable requirements of this specification. Customers should ensure that enclosures under assessment have been tested to the applicable requirements, rather than designed (but not tested) to a subset of the requirements. Note that the laboratories that test to GR-487 do not provide a certification of approval. They provide a test report stating the test done and their results. Reputable enclosure manufacturers will provide copies of the test report. This test report is for a specific configuration in time, and the laboratory does not verify continuous compliance. Therefore, customers should ensure the test reports are relevant to the specific revision level they are assessing.

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GR-487 Testing

Telcordia Standards Pdf Format

Telcordia prohibits the disclosure of test sequences and parameters without prior written permission, so individual tests sequences cannot be publically disclosed. The range of requirements tested in GR-487 specification include:

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Finish
Metallic Materials
Polymeric Materials
Lifting Details
Security/Alarms
Bonding & Grounding
Vertical and Horizontal Door Restraints
AC Power
Exposure to High Temperature
Surface Temperature
Thermal Shock
Water, Dust, an Insect Intrusion
External Icing
Acoustical Noise Emissions
Firearms Resistance
Fire Resistance
Corrosion Resistance
Shock, Vibration and Impact Resistance
Seismic Resistance
Marking, Packaging, and Shipping

More Telcordia Information

Regulatory Information

Telcordia Bellcore Standards

MTBF-Calculation acc. to Standards
Mil-HDBK-217
→TelcordiaSR-332
IEC-TR-62380
SiemensSN 29500
FIDES2009
217Plus
GJB/Z 299C

TelcordiaSR-332was the second electronicreliability prediction standard (after Mil-HDBK-217) and is still the second most popular ofall current electronic reliability prediction standards.
With itslatest edition (issue 4) from 2016, Telcordia has undergone by far themost revisions and is therefore the oldest electronic reliability prediction standard; it has been consistently kept up to datefor many decades:
Originally named Bellcoreissue 1,2,3,4,5 and 6, then hcanged into Telcordia issue 1,2 3 and 4.

The Telcordia methodology isquitesimilar to the Mil-HDBK-217 methodology, however it tends to besimpler. Incontrast to Mil-HDBK-217,Telcordia uses only up to 2 component specific parametersper component type. Aditionally, these 2 parameters are easier todetermine (with the # of transistors or gates in ICs being the onlyexception). Similar methodology makes it quite easy to transformMil-HDBK-217 MTBF values into Telcordia MTBFvalues (and vice versa), provided that a reliability predictionsoftware is used.
Telcordiaenvironment types areidentical with Mil-HDBK-217 environment types, but Mil-HDBK-217 offersmore environment types. The same is true for component cov