TIA Presentation TIA-1083 -A TIA User Premise Equipment

TIA Presentation: TIA-1083 -A TIA User Premise Equipment Division June 4, 2009 1

Agenda Overview of TIA – Rebecca Schwartz TIA -1083: History, TIA’s Role & Accomplishments – Al Baum TIA-1083 A: Revision & The Future – Stephen Whitesell 2

Meeting Attendees Al Baum, Engineering Manager, Uniden America Corporation Fred Lucas, Principal, FAL Associates Paul Schomburg, Sr. Manager, Government & Public Affairs, Panasonic Corporation of North America Stephen Whitesell, Sr. Technical Consultant, Standards, Regulatory and Intellectual Property Matters, VTech Communications Rebecca Schwartz, Director, Regulatory and Government Affairs, TIA Patrick Sullivan, Director, Technical and Government Affairs, TIA 3

Telecommunications Industry Association A leading Standards Developing Organization (SDO) accredited by American National Standards Institute (ANSI). Represents the global information and communications technology (ICT) industry through – – – Standards development Advocacy Business opportunities Market intelligence World-wide environmental regulatory compliance. 4

Telecommunications Industry Association Supports the development of innovative technology to facilitate access to information by all Americans, including those with disabilities. 5

TIA Works to Help People with Hearing Loss TIA works with these organizations to support initiatives to help those with hearing loss: Hearing Loss Association of America (HLAA) National Association for Deaf Gallaudet RERC on Telecommunications Access U. S. Access Board Members of Congress Federal Communications Commission 6

Recent Policy Activities in 2008 -2009 Include: – TIA 10 th Annual Spring Policy Summit addressed accessibility under the new Administration – Working with Congressional staff on Rep. Markey’s accessibility bill – TIA filed Accessibility Initiatives with President Obama’s Transition Team – TIA co-hosted Accessibility Technology Fair on Capitol Hill – Coordination with the Assistive Technology (AT) industry 7

Review of the Development of TIA-1083 8

Consumer Complaints In 2004, telephone manufacturers began to receive customer complaints regarding hearing aid interference problems with digital cordless telephones. Specifically consumers were hearing a buzz noise when using digital cordless telephones with hearing aids and cochlear implants when set to T-Coil mode. There were no reports of the buzz noise from analog cordless telephones. 9

Industry Response At the August 2004 meeting of TIA Subcommittee TR 41. 3 a Gallaudet University presentation on the subject was discussed along with possible causes for the reported interference. The consensus belief was that, due to the low RF power levels used by cordless phones, the source of the reported interference was probably magnetic. Further work towards confirming this belief and developing a testing method to characterize the magnetic interference was conducted during the remainder of 2004 and first half of 2005. 10

Industry Response First, the complaint phones were tested for compliance with the FCC Part 68. 316 HAC regulations. The test results confirmed that all of the phones were compliant. Next, the complaint phones were tested with hearing aids obtained from and programmed by Gallaudet University. This testing confirmed that digital spread spectrum cordless telephones were indeed causing interference to hearing aids. (This testing also confirmed that analog cordless telephones did not cause interference. ) 11

Why was this happening? Analysis of the noise characteristics indicated that the source of the noise was the Time Division Duplexing (TDD) employed by the Digital Spread Spectrum (DSS) cordless phones to enable them to transmit and receive on the same frequency. This turning on and off of the transmitter at a very rapid rate resulted in large changes in battery current which in turn caused large changes in the magnetic field produced by the wiring in the handset. This magnetic pulsing was being picked up by the T-Coil in the hearing aid and heard as a loud buzzing noise by the wearer. 12

HLAA Studies 2005 HLAA National Convention Study conducted by Linda Kozma-Spytek of the Rehabilitation Engineering and Research Center (RERC) on Telecommunications Access and the Technology Access Program at Gallaudet University. Volunteers from among the HLAA Convention attendees tested a group of phones and rated their performance. – – – Loudness Percent Words Understood Interference Usability “Would you buy a phone with this level of interference? ” 13

HLAA Studies 2006 HLAA National Convention Study conducted by Gallaudet University, Etymotic Research and Motorola. Volunteers from among the HLAA attendees participated in this study and helped to answer the question: “How much noise is too much noise? ” 14

TIA Completes Development of New Standard Results from the two HLAA Studies were compared with lab measurements by TIA member companies. Performance Requirements were established Compliant phones were tested by wearers of hearing aids and cochlear implants with good results. ANSI/TIA-1083 “Handset Magnetic Measurement Procedures and Performance Requirements” was published in March 2007. Official “TIA-1083” logo was developed and licensed by TIA to manufacturers for display on the packaging of compliant products. 15

Official TIA-1083 Logo Compliant products with these logos are widely available in the market. 16

A Brief Comparison of TIA-1083 and C 63. 19 17

M and T Ratings C 63. 19 uses M and T ratings to indicate likelihood of cell phone interference with a hearing aid or cochlear implant. The M rating is for radio frequency (RF) interference in the microphone mode. The T rating is for magnetic interference in the T-coil mode. TIA-1083 only has one level of compliance and does not use M and T ratings. 18

TIA-1083 and C 63. 19 Equivalence TIA-1083 magnetic interference requirements are equivalent to C 63. 19 requirements for a T 4 rating. RF interference is not addressed by TIA-1083 because cordless phone RF signal levels are typically much lower than for cell phones. A cordless handset must communicate with a base unit that may be 100 feet or so away. A cell phone may have to communicate with a tower that is a few miles away. 19

TIA-1083 -A REVISION OVERVIEW 20

TIA-1083 -A Differences Minimal changes for telephones with analog interfaces that were covered by TIA-1083. Transverse performance requirements that had an effective date 24 months after March 2007 publication of TIA-1083 are now mandatory for compliance with the standard. Frequency response template now applies to transverse magnetic field as well as to perpendicular magnetic field. 21

TIA-1083 -A Differences Main purpose was to add requirements for wireline products with digital interfaces such as Vo. IP telephones, softphones running on personal computers, etc. Goal was identical performance requirements for all telephones. Since magnetic noise sources are internal to the telephone handset, the same test procedures should apply. Specifying digital input signal equivalent to analog signal being used for measuring desired magnetic field was the challenge. 22

TIA-1083 -A Status The TIA-1083 -A document has been submitted for ballot as an American National Standard The TIA ballot period closed on June 8 th with all votes received being in favor of approval. Two of the votes were accompanied by comments. A meeting will be called to review and resolve the comments after the ANSI comment period closes on June 22 nd. We anticipate publishing the revised standard later this summer. 23

Future of TIA-1083 Devices with codecs that require test signals other than pure tone sine waves are under study for inclusion in an addendum or future revision of this standard. An alternative weighting function that is claimed to provide better subjective correlation over a wider range of interfering noise types is also under study for possible inclusion in an addendum or future revision of this standard. 24

Thank You Questions or Comments? …Also, feel free to contact us: TIA DC Office 10 G Street, NE Suite 550 Washington, DC 20002 (202) 346 -3240 25