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Grandstream Networks, Inc.

126 Brookline Ave, 3rd Floor

Boston, MA 02215 USA

Voice: (617) 566-9300 

Fax: (617) 249-1987 

www.grandstream.com

For Certification, Warranty and RMA information, 

please visit www.grandstream.com

GRP2603 / GRP2603P

Quick Installation Guide

3-Line Essential IP Phone

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