TIA ANSI/TIA-470.120-C PDF

This standard provides speakerphone acoustic performance requirements for Customer Premises Equipment (CPE) intended for analog connection to the Public Switched Telephone Network (PSTN). These requirements should ensure compatibility and satisfactory performance to the user in a high percentage of installations. Test measurement methods reference procedures in IEEE Std 1329 where applicable.

This document proposes or references at least one measurement procedure for each technical requirement. However, these procedures are not exclusive. Any measurement procedure and equipment that can result in an identical measurement is considered valid.

While the procedures may call out specific test points within the requirements, the full range of the requirements take precedent.

This standard is primarily intended to be used for evaluating single user speakerphones normally used at a distance of one half meter or closer. These requirements are not intended for Cordless handset speakerphones or multi-user conference speakerphones.