On Hold System

On Hold System is also listed under the following categories: Standard Yellow Pages Heading (SYPH) Categories:

• Telephones On Hold Audio Services

North American Industry Classification System (NAICS) Categories:

• Telephone Answering Services > Telephone Answering & Messenger Services > Telephone On Hold Audio Services

Standard Industry Classification (SIC) Categories:

• Business Services, Nec > Telephone Answering & Messenger Services > Telephone On Hold Audio Services