Inner Phone Systems is also listed under the following categories: Standard Yellow Pages Heading (SYPH) Categories:

• Security Control Equipment & Systems & Monitoring
• Telephones Equipment & Systems Service & Repair
• Telephones Equipment & Systems
• Telephone Equipment Sales & Service

North American Industry Classification System (NAICS) Categories:

• Electrical Apparatus And Equipment, Wiring Supplies, And Related Equipment Merchant Wholesalers > Alarms, Signaling & Security Equipment > Security Control Equipment
• Radio, Television, And Other Electronics Stores > Telephone & Communication Equipment > Telephones Equipment & Systems
• Security Systems Services (Except Locksmiths) > Anti-Theft Alarm Systems Services > Bank Protective Equipment
• Communication Equipment Repair And Maintenance > Electronic Equipment Repair, Except Computers > Telephones Equipment & Systems Repair

Standard Industry Classification (SIC) Categories:

• Electrical Apparatus & Equipment > Alarms, Signaling & Security Equipment > Security Control Equipment
• Miscellaneous Retail Stores, Nec > Telephone & Communication Equipment > Telephones Equipment & Systems
• Security Systems Services > Anti-Theft Alarm Systems Services > Bank Protective Equipment
• Electrical And Electronic Repair Shops, Nec > Electronic Equipment Repair, Except Computers > Telephones Equipment & Systems Repair