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http://www.cortelco.com/..._3220_manual.pdf
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Table of contents
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• IMPORTANT SAFETY INSTRUCTIONS
• TELEPHONE USAGE
• INSTALLATION
• 90V MESSAGE WAITING LAMP
• TELEPHONE PART IDENTIFICATION
• TELEPHONE FEATURES
• CALLER ID FEATURES
• MESSAGE ERROR
• PRIVATE CALLS
• UNKNOWN CALLS
• TELEPHONE SERVICE PROBLEMS
• MAINTENANCE INFORMATION
• TELEPHONE REPAIR
• FCC INFORMATION
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