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TIA-1083 Wireline Telephone HAC Performance Requirements

TIA-1083 Wireline Telephone HAC Performance Requirements. With a Comparison to C-63.19 Wireless Telephone HAC Magnetic Performance Requirements. ANSI/TIA-1083-2007. Telecommunications – Telephone Terminal Equipment – Handset Magnetic Measurement Procedures and Performance Requirements

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TIA-1083 Wireline Telephone HAC Performance Requirements

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  1. TIA-1083 Wireline TelephoneHAC Performance Requirements With a Comparison toC-63.19 Wireless TelephoneHAC Magnetic Performance Requirements

  2. ANSI/TIA-1083-2007 • Telecommunications – Telephone Terminal Equipment – Handset Magnetic Measurement Procedures and Performance Requirements • Approved March 21, 2007 • Developed by TIA TR-41.3, Analog and Digital Wireline Terminals

  3. Overview • Addresses magnetic interference issues identified by hearing aid users. • RF interference does not appear to be a significant issue for cordless telephones.

  4. Requirements Summary • Signal Sensitivity: •  -22 dB (A/m) at 1000 Hz, Perpendicular •  -27 dB (A/m) at 1000 Hz, Transverse • Same as Part 68, but greater latitude allowed in measurement location. • Harmonic Distortion: •  10%, Perpendicular and Transverse • Frequency Response: • Same as Part 68 and C63.19, Perpendicular.

  5. Requirements Summary (cont) • A-Weighted Noise: •  -40 dB (A/m), Perpendicular and Transverse • Measured same as in C63.19 using half-band integrator. • Signal-to-Noise Ratio: •  45 dB, Perpendicular and Transverse • Approximately equivalent to 30 dB requirement for C63.19.

  6. Requirements Summary (cont) • Signal-to-Noise Ratio (cont) • Noise is measured same way for both standards. • Signal in C63.19 represents “nominal level speech input” (see Footnote 45). • Signal in TIA-1083 is same as in Part 68 and is “approximately 15 dB above the average level” (see paragraph 2.4 in EIA RS-504 as reproduced in 47 CFR 68.316).

  7. Perpendicular Measurement

  8. Transverse Measurement

  9. 2005 SHHH Cordless Study Figure C.3 from TIA-1083

  10. 2006 HLAA Parametric Study Figure D.3 from TIA-1083

  11. RF Interference ?? • Informal FCC Complaints received by cordless telephone manufacturers were from T-coil users. • RF power level typically 200 mW. • 2005 SHHH Cordless Study included 27 people who used T-coil coupling and 5 who used acoustic coupling to the microphone.

  12. 2005 SHHH Cordless Study

  13. Contact Information Stephen R WhitesellTIA Representative to C63Chair, TIA TR-41Senior Technical ConsultantStandards, Regulatory and Intellectual Property MattersVTech CommunicationsTel: 732 751 1079Email: swhitesell@vtech.ca

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