AT&T Inc.
Barry County Telephone Co.
Bharti Airtel Limited
BT Group
Contec Holdings, LLC
Emirates Telecommunication Corporation (Etisalat)
KPN
New Lisbon Telephone Company
Nippon Telegraph and Telephone Corp. (NTT)
RADIO MÓVIL DIPSA S.A. DE C.V.
Tata Communications Limited
Verizon Communications Inc.
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3M Communication Markets Division
ADTRAN, Inc.
ADVA Optical Networking
AFL Telecommunications LLC.
All Systems Broadband
ALOM Technologies Corporation
Alpha Technologies Ltd
Avion Networks, Inc.
CABLCON
Calix, Inc.
Canoga Perkins
Cherokee Nation Industries, LLC dba Cherokee Nation Telecommunications
Ciena Corporation
Cisco Systems
CommScope
COMMSCOPE (Formerly ARRIS)
Communications Test Design (CTDI)
Comtech Telecommunications Corp
Comtest Networks, Inc.
Corning, Inc.
ECI Telecom
Ericsson
FiberHome Telecommunication Technologies Co., Ltd.
Fortress Solutions
Fujitsu
General Cable Corporation
Genesis Networks, Inc.
GF MICRO OPTICS PHILIPPINES, INC.
Hewlett Packard Enterprise
Huawei Technologies Co., Ltd.
Infinera Corporation
iQor Global Services, LLC
Jabil Circuit Inc
Jiangsu Zhongtian Technology Co., Ltd.
Juniper Networks, Inc.
KCI Telecommunications, LLC
KGPCo
Link America, LLC
MDSi
Microsemi Frequency and Time Corporation
Millennium Technical Services, Inc.
NEC Groups
NOKIA
Oracle
PALCO Telecom Service, Inc.
Power & Telephone Supply Company
Prysmian Cables and Systems USA, LLC
Purcell Systems, Inc
Ribbon Communications
Samsung Electronics
Sector Supply, LC
SPC
Sterlite Technologies Limited
Summit Container Corporation
Superior Essex International LP
Suttle
Tech Mahindra Limited
Telamon Technologies Corporation
Telect, Inc.
Teltech Group
Tempest Telecom Solutions LLC
The DESARA Group, Inc.
Tii Technologies Inc.
Trillion Communications Corporation
Trilogy Communications, Inc.
Vertiv
Viavi Solutions
Wipro Limited
World Wide Technology
ZTE Corporation
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Akkreditierung Austria
ANSI National Accreditation Board (ANAB)
Bizpeer Co., Ltd.
BSI Group
Bureau Veritas Certification North America, Inc.
Business for Social Responsibility
Bywater Excel
CANTO
CEPREI Certification Body
China National Accreditation Service for Conformity Assessment(CNAS)
DNV GL
DQS Inc.
epi Consulting
goetzpartners
Hong Kong Quality Assurance Agency (HKQAA)
Industrial Internet Consortium (IIC)
IRAM
Japan Accreditation Board (JAB)
Japan Quality Assurance Organization - JQA
Korea Accreditation Board
Korea Quality Assurance (KQA)
Lloyds Register Quality Assurance Inc.
Metrinomics GmbH
National Association of Tower Erectors (NATE)
National Standards Authority of Ireland
NQA (National Quality Assurance)
Orion Registrar, Inc.
QA - Quality Austria
QMI-SAI Canada Limited
SGS-CSTC Standards Technical Services Co., Ltd.
Shenzhen Association for Quality (SAQ)
Standards Council of Canada (SCC)
Technofer.Ltd.Japan
TeleManagement (TM) Forum
TÜV Rheinland (China) Ltd.
TUV SUD America, Inc.
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