Trivalent Communications is also listed under the following categories: Standard Yellow Pages Heading (SYPH) Categories:

• Telephone Equipment Sales & Service
• Telephone Equipment & Systems Computer Telephony

North American Industry Classification System (NAICS) Categories:

• Radio, Television, And Other Electronics Stores > Telephone & Communication Equipment > Telephones Equipment & Systems
• Communication Equipment Repair And Maintenance > Electronic Equipment Repair, Except Computers > Telephones Equipment & Systems Repair

Standard Industry Classification (SIC) Categories:

• Miscellaneous Retail Stores, Nec > Telephone & Communication Equipment > Telephones Equipment & Systems
• Electrical And Electronic Repair Shops, Nec > Electronic Equipment Repair, Except Computers > Telephones Equipment & Systems Repair