Exhibit 21-a

ADC Telecommunications, Inc.
Subsidiaries
1/5/2007

Name	Jurisdiction
ADC (Australia) Technique PTY Limited	Australia
ADC (India) Communications & Infotech Private Limited	India
ADC Beteiligungsgesellschaft mbH	Germany
ADC Broadband (Hong Kong) Limited	Hong Kong
ADC Broadband Italy S.r.l.	Italy
ADC Communications (Australia) PTY Limited	Australia
ADC Communications (NZ) Ltd.	New Zealand
ADC Communications (SEA) Pte. Ltd.	Singapore
ADC Communications (Shanghai) Company Ltd.	People’s Republic of China
ADC Communications (Thailand) Ltd.	Thailand
ADC Communications (UK) Holding Ltd.	United Kingdom
ADC Communications (UK) Ltd.	United Kingdom
ADC Communications Hong Kong Limited	Hong Kong
ADC Communications Japan K.K.	Japan
ADC Connectivity Solutions LLC	Minnesota
ADC Czech Republic, s.r.o.	Czech Republic
ADC DSL Systems, Inc.	Delaware
ADC Danmark ApS	Denmark
ADC Digital Communications, Inc.	Delaware
ADC EMEA Holding GmbH	Germany
ADC Europe N.V.	Belgium
ADC Global Holdings, Inc.	Minnesota
ADC GmbH	Germany
ADC Holding, Inc.	Delaware
ADC Incorporated	Colorado

Exhibit 21-a

Name	Jurisdiction
ADC Informations systeme GmbH	Germany
ADC International Holding Company	Minnesota
ADC International Holding, Inc.	Delaware
ADC International OUS, Inc.	Minnesota
ADC Italia S.r.l	Italy
ADC Manufacturing Services PTY Limited	Australia
ADC Metrica Ireland Limited	Ireland
ADC OUS Holdings, LLC	Delaware
ADC Optical Systems, Inc.	Delaware
ADC Puerto Rico, Inc.	Puerto Rico
ADC Services GmbH	Germany
ADC Soluciones de Conectividad, S.A.	Spain
ADC Systems Integration France SAS	France
ADC Telecom Canada Inc.	Canada
ADC Telecommunicacoes Industria e Comercio Ltda.	Brazil
ADC Telecommunications (Africa) (Proprietary) Limited	South Africa
ADC Telecommunications (China) Limited	People’s Republic of China
ADC Telecommunications (Scotland) Limited	Scotland
ADC Telecommunications (Shanghai) Distribution Co., Ltd.	People’s Republic of China
ADC Telecommunications Australia Pty. Limited	Australia
ADC Telecommunications Equipment (Shanghai) Co., Ltd.	People’s Republic of China
ADC Telecommunications GmbH	Germany
ADC Telecommunications India Private Limited	India
ADC Telecommunications Israel Ltd.	Israel
ADC Telecommunications Netherlands B.V.	Netherlands
ADC Telecommunications Sales, Inc.	Minnesota
ADC Telecommunications Singapore Pte Limited	Singapore
ADC Telecommunications UK Ltd.	United Kingdom

Exhibit 21-a

Name	Jurisdiction
ADC Telecomunicaciones Venezuela, S.A.	Venezuela
ADC Telecomunicacoes do Brasil Ltda.	Brazil
ADC Wireless Solutions LLC	Minnesota
ADC de Delicias, S. de R.L. de C.V.	Mexico
ADC de Juarez, S. de R.L. de C.V.	Mexico
ADC de Mexico S.A. de C.V.	Mexico
Codenoll Technology Corporation	Delaware
FONS (Ireland) Limited	Ireland
FONS Connectivity Corp.	Massachusetts
FONS Nitta (Hangzhou) Co., Ltd.	Japan
FONS Nitta Asia Pacific Corporation	Japan
Fiber Optic Network Solutions Corp.	Massachusetts
Hazeltine Merger Sub, Inc.	Delaware
KRONE Chile Ltda.	Chile
KRONE Communications Ltd.	India
KRONE Comunicaciones S.A. de C.V.	Mexico
KRONE Hellas Telecommunication S.A., Greece	Greece
Nihon ADC Kabushiki Kaisha	Japan
PT KRONE Indonesia	Indonesia
Princeton Optics, Inc.	New Jersey
Teleprocessing Products, Inc.	California
ZAO KRONE AG RF	Russia