ADC DSL Systems, Inc.

14402 Franklin Avenue

Tustin, CA 92780-7013

Tel: 714.832.9922

Fax: 714.832.9924

Technical Assistance

Tel: 800.638.0031

Fax: 714.730.3222

ISO 9001/TL 9000

DNV Certification, Inc.

REGISTERED FIRM

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1220432