TIA TIA-504-A
TA TA-504-A 1998-FEB-01 Telecommuncatons - Telephone Termnal Equpment - Magnetc Feld and Acoustc Gan Requrements for Handset Telephones ntended for Use by the Hard of Hearng
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This Standard defines magnetic field requirements for all handset telephones intended to couple magnetically with hearing aids.
This Standard also covers requirements for receive-amplified handset telephones intended for use by the hard of hearing.
This Standard does not cover other devices for the hard of hearing to use the telephone network.