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Recent Update to Recent Update to Recent Update to Telcordia Telcordia Telcordia

GRGRGR---108910891089---CORECORECORE

Dave Lorusso Dave Lorusso Dave Lorusso Lorusso Technologies, LLCLorusso Technologies, LLCLorusso Technologies, LLCPatrick Webb Patrick Webb Patrick Webb National InstrumentsNational InstrumentsNational Instruments

2003 All Rights Reserved2003 All Rights Reserved2003 All Rights Reserved

IEEE EMC Symposium - August, 2003 "Recent Update to Telcordia GR-1089-CORE" www.lorusso.com

Presentation Overview

Introduction to Telcordia GR-1089-CORE Why did GR-1089-CORE Change? Section-by-Section Changes How do these changes affect my product? Wrap Up


Introduction to GR-1089-CORE

Electromagnetic Compatibility and Electrical Safety Generic Criteria for Network Telecommunications Equipment

Nine major sections covering the EMC and Safety phenomenon as seen by the Central Office (CO) environment No single CO will experience all conditions

cited in GR-1089-CORE


Introduction to GR-1089-CORE

In a nutshell: ESD, EFT, EMC, Lightning, Power Cross,

Steady-State Induction, DC Potential Difference, Electrical Safety, Corrosion, Grounding and Bonding

Approximately 150 Requirements and/or Objectives

Customer, not legal, requirements and/or objectives


Why did GR-1089-CORE Change?

Last revision was February, 1999 Addresses:

ESD Harmonization with IEC 61000-4-2 EFT to telecom and power ports per IEC 61000-4-4 New xDSL services (conducted emissions and

immunity at broadband frequencies) New FCC Part 15 requirements on emission for ac

power lines. Guidance for use of current-limiters in high speed

digital networks


Why did GR-1089-CORE Change?

Addresses: Clarifications in Section 4 Coaxial cables and power induction Harmonization of Electrical Safety terminology Guidance on the application of the criteria to various

types of network equipment. Number of samples clarification Performance language used for non-switching systems


Section-by-Section Changes

Section 2 - System-Level Electrostatic Discharge (ESD) Updates bring GR-1089-CORE in line with IEC 61000-4-2

ESD References and Waveforms ESD Installation and Repair test objective changed to a requirement

Criteria objective to become a requirement January 1, 2005 ESD warning labels are now mandatory ESD severity and test point selection has not been changed New EFT Objective applies to all products

Was a Frame EFT test in Issue 2 used for Compatibility of FormerIBN Equipment with CBN Currents



Section 2 - System-Level Electrostatic Discharge (ESD) EFT criteria and test methods are in accordance with

IEC 61000-4-4 The EUT should not be damaged and should continue to operate

properly when five one-minute EFT/Burst applications of each polarity, positive and negative, are applied at:

0.25 kV for Port Types 1 and 2 as defined in Appendix B 0.5 kV for AC and DC Ports of network equipment to be located in

non-customer premises 0.5 kV for Port Types 3 and 4 as defined in Appendix B 1 kV for AC and DC Ports of equipment to be located in customer

premises



Section 3 Electromagnetic Interference Ensures that an EUT:

Complies with FCC Part 15 Complies with FCC Part 68 with technical criteria

per TIA/EIA/IS-968 Has intrasystem EMC with other equipment located

within the same facility Has Intersystem EMC between it and other

electronic equipment in the surrounding environment



Section 3 Electromagnetic Interference New class of interface Broadband

Conducted emissions and immunity Objectives added that coincide with FCC requirements

Applicable to DSL and other high speed interfaces deployed over Outside Plant (OSP)

Immunity testing Slower scan rate of 0.1% frequency steps from 1-8GHz and

0.05% steps from 8-10GHz Dwell frequencies of 2450MHz and 5800MHz have been

added for ISM-Bluetooth and ISM-Spread Spectrum respectively



Section 4 Lightning and AC Power Fault Major clarifications throughout [4.6] All paired telecommunications unshielded intra-building

interface ports are subject to surge testing Issue 2 exempted these ports Impact on Ethernet ports used in network management

[4.6] Adjacent ports to the tested port shall not be damaged andshall operate without manual intervention; adjacent ports are terminated as in service

[4.6] Clarification of proper operation after the unit is surge tested utilizing maximum rated loop length and performance criteria defined in standards



Section 4 Lightning and AC Power Fault [4.6.3] Number of samples tested has been clarified

3 Ports of the EUT in each applicable operating state except where explicitly stated

[4.6.6] Dedicated ground is required between EUT ground terminal and the surge generator; 48 V return grounding is required

[4.6.7] Clarification of Note 5 of Table 4-2 on the maximum operating threshold for a voltage-limiting device and instruction on disabling or removing the device for test



Section 4 Lightning and AC Power Fault [4.6.7.1] Coordination of secondary protection

addressed as an Objective; effective in 2005; mandatory in 2006

The value for Primary Protection must be called out in the product manual (400, 600, or 1000 V at 1000 V/uS

[4.6.10] First-Level AC Power Fault test Objectives numbers 6, 7, 8, and 9 are now Requirements



Section 4 Lightning and AC Power Fault [4.6.11] Modification of the Current-Limiting Protector

test Use of a Type MDQ 1-6/10A or Type MDL 2.0A fuse still

acceptable as the external current limiter indicator; also allows non-invasive time-current measurement techniques

Various short-circuit currents are added 2.2, 2.6, 3, 3.75, 5, 7, 10, 12.5, 20, 25, and 30 Arms for up to 15 minutes

Listing requirements moved to Section 7



Section 5 Steady-State Power Induction Longitudinal induction for coaxial cables

Three units shall be tested Requirement - 15Vrms/60Hz triangular waveform

Products that meet the requirement should be immune to most induction environments

Objective - 30Vrms/60Hz triangular waveform Products that meet the objective should be immune even

in severe induction environments



Section 6 DC Potential Difference No changes were made in this section

Finally, a break!



Section 7 Electrical Safety Criteria Listing requirements added Overview section provides clearer view on how to

evaluate equipmentby deployment; accessibility better defined

Continuous Source voltage limits better defined Between each terminal and ground with all other terminals

connected as in normal service Limits also apply between each terminal and ground with all

other terminals open circuted Paired-conductor sources or similar circuits, the limits shall

apply with all other terminals individually grounded



Section 7 Electrical Safety Criteria Industry standardized sources known to be below Class

A1 do not need to be tested RS-232, V.35, 10BaseT, 100BaseT, X.25, DSX-1, E1, DS3,

USB

Interrupted/Tripped voltages Can use NRTL data according to UL 60950 Method B as

described in Annex M.3

Sources applied to communication wiring limited to 1.3 A is the ampacity of the wiring is not specified



Section 8 Corrosion DC Voltages to outside plant cabling

The objective still exists that DC voltage potentials between telecommunications conductors and ground be less than 56.7 volts to prevent leakage current

However, it is no longer suggested that the voltage potential be negative respective to ground



Section 9 Bonding and Grounding Guidance is provided to instruct where

requirements are applicable: i.e. equipment in COs, outside plant, etc.

Small metallic surfaces (less than 100mm2surface area) not likely to be energized do not have to be grounded



Section 9 Bonding and Grounding Instructions must be included with equipment

to remove paint and clean metal with an anti-oxidant where ground connections are made

Provisions for connections and bonding of circuit packs have been added

Painted surfaces are considered to be conductive



Section 9 Bonding and Grounding Short Circuit Test

Equipment does not need to be functional after the short circuit test

No fire/fragmentation or damage to the fault current path is allowed

No damage to other subassemblies is allowed If the current is interrupted by a non NRTL listed

fuse the test must be repeated twice


How do these changes affect my product? Clarifications and Harmonization

Make for easier interpretation of the requirements

New Requirements EFT Objective applies to all products Broadband Interfaces added Significant change to Lightning and AC Power Fault

section Coaxial port immunity to steady-state power induction Bonding and Grounding integrity enforcement


How do these changes affect my product? Current NEBS Level 3 products will need to

be reviewed against new requirements. Additional testing costs Additional test time Will result in a more robust product


Wrap Up

Thank you for your participation

Resources: www.nebs-faq.com www.lorusso.com Or call us:

Dave Lorusso - 512-695-5871 Patrick Webb 512-683-5743

Recent Update to Telcordia GR-1089-COREPresentation OverviewIntroduction to GR-1089-COREIntroduction to GR-1089-COREWhy did GR-1089-CORE Change?Why did GR-1089-CORE Change?Section-by-Section ChangesSection-by-Section ChangesSection-by-Section ChangesSection-by-Section ChangesSection-by-Section ChangesSection-by-Section ChangesSection-by-Section ChangesSection-by-Section ChangesSection-by-Section ChangesSection-by-Section ChangesSection-by-Section ChangesSection-by-Section ChangesSection-by-Section ChangesSection-by-Section ChangesSection-by-Section ChangesSection-by-Section ChangesHow do these changes affect my product?How do these changes affect my product?Wrap Up

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