This U.S. industry comprises establishments primarily engaged in answering telephone calls and relaying messages on behalf of clients or for other establishments of the same enterprise.

Including:

• Answering services, telephone
• Emergency telephone dispatch (i.e., contractor) services
• Local call centers (e.g., answering services, message services)
• Message services, telephone answering
• Telephone answering services
• Telephone call forwarding services
• Voice mailbox services
• Wakeup call services