EW780-8523-001.9GHz DECT Cordless Phone with Headset

User’s manual TL7912 DECT 6.0 cordless headset and handset lifter Congratulations on your purchase of this AT&T product. Before using this AT&T product, please read the Important safety information section on pages 51-54 of this manual. Please thoroughly read this user’s manual for all the feature operations and troubleshooting information necessary to install and operate your new AT&T product. You can also visit our website at www.telephones.att.com or call 1 (800) 222-3111. In Canada, dial 1 (866) 288-4268. Model number: TL7912 (Headset, headset base and handset lifter) Type: DECT 6.0 cordless headset and handset lifter Serial number: Purchase date: Place of purchase: Both the model and serial numbers of your AT&T product can be found on the bottom of the headset base and lifter. Save your sales receipt and original packaging in case it is necessary to return this product for warranty service. © 2012 Advanced American Telephones. All Rights Reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property licensed to Advanced American Telephones, San Antonio, TX 78219. Printed in China. Parts checklist Check to make sure the headset package includes the following items. Save your sales receipt and original packaging in the event warranty service is necessary. Cordless headset with medium-sized earbud attached Battery pack (battery with battery compartment cover attached) User's manual User’s manual TL7912 DECT 6.0 cordless headset and handset lifter Quick start guide Quick start guide TL7912 DECT 6.0 cordless headset and handset lifter 2 earbuds Behind-the-neck bandOver-the-head band Line splitter 2 over-the-ear hooks Parts checklist (continued) Auxiliary ring detector Telephone line cordLarge lifter padlifter pad padHandset lifterlifter Headset base Anti-slip pad USB cable Headset base power adapter Corded phone connection cable Optional accessory In this manual, there are references to TL7900. The TL7900 includes an expansion headset and a headset charger (up to two headsets can be used with the same headset base). TL7900 can be purchased separately. For more information about the product, visit our website at www.telephones.att.com. User’s manual TL7912 DECT 6.0 cordless headset and handset lifter 1 light status RedOn when the headset is charging in the headset base. Flashes every 10 seconds to indicate the battery is low when the headset is not in the headset base. Flashes three times to indicate the headset is powering off. • • • BlueOn when a fully charged and registered headset is in the headset base. Flashes three times to indicate the headset is powering on. Flashes twice every three seconds when the headset is in use. Flashes four times every four seconds when there is an incoming call in PHONE mode. Flashes every 10 seconds when a fully charged and registered headset in idle mode is out of the headset base. • • • • • Red and blueFlashes slowly when the headset is not registered. Flashes quickly when the headset is trying to register to a headset base or telephone base. • • OffThe battery is dead. No battery is installed. The headset is powered off. • • • Quick reference guide - headset Headset lights (On/off button and light) Press to make, answer or end a call (pages 31 and 32). Getting started 2 Getting started VOL+/VOL- Push the volume switch on the headset to the right or left to adjust the headset ringer volume while in idle mode (page 32) or the listening volume while on a call (page 35). Earpiece Microphone The microphone incorporates noise canceling technology for clearer calls. MUTE/FLASH Press to mute the microphone during a call (page 36). Press and hold for two seconds to answer an incoming call when you receive a call waiting alert during a call (page 33). Press to mute the ringer in the earpiece when there is an incoming call (page 33). Quick reference guide - headset Battery pack Open to replace the battery pack. 3 Getting started One short beepHeadset key tone.• One short beep every 30 seconds Muted headset microphone alert tone.• Two beepsError alert tone. The ringer volume is at its lowest setting. The listening volume is at its highest or lowest setting. Any key is pressed while the headset is out of range. • • • • Two low beepsCall waiting alert tone.• Two rapid beeps every 20 seconds Low battery warning.• Three rising beepsA conference call starts.• Three rapid beeps every 20 seconds The headset is out of range. The headset is not yet registered. • • Ring toneIncoming call alert tone. Ring back tone. • • Three rapid beepsThe headset is powering on or off.• Quick reference guide - headset Headset alert tones 4 Getting started Quick reference guide - headset base Magnetic charging mount Place the headset here for charging. MUTE (light) PAIR Use to initiate headset registration or deregistration. PHONE (mode button and light) PC (mode button and light) MUTE (Red) On when you are registering a headset. Flashes when the mute function is in use. Flashes when you are deregistering headset(s) from the headset base. • • • PHONE (Blue) On when PHONE mode (default mode) is selected on the idle headset base. Flashes four times every four seconds when there is an incoming call. Flashes twice every three seconds when the headset is in use in PHONE mode, or when there is a conference call in both PHONE and PC modes. Flashes slowly when a call is on hold in PHONE mode. • • • • PC (Blue) On when PC mode (default mode) is selected on the idle headset base. Flashes twice every three seconds when the headset is in use in PC mode, or when there is a conference call in both PC and PHONE modes. Flashes slowly when a call is on hold in PC mode. • • • Headset base lights 5 Getting started VOLUME /MICROPHONE Press the volume keys on the side of the headset base to adjust the speaking volume when on a call (page 35). CORDED HANDSET CONNECTED/ YES/NO Choose the setting based on whether you are using a corded handset (page 13). LIFTER This jack is only used with the hand…

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Appendix B1 Letter of Agency for FCC Certification May 14, 2012 To whom it may concern, Letter of Agency I, an officer of VTech Telecommunications Limited do hereby authorize Intertek Testing Services (Mr. Ken Sit/ Mr. Melvin Nip) to act on our behalf in front of the Federal Communications Commission with respect to all matters relating to certification of equipment under Part 15 and/or Part 95 of the FCC Rules until further notice. I further certify that no party (as defined in §1.2002(b) of CFR 47, 2004) to this application, including myself, is subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C., 862. Regards, Samson Man Approbation Supervisor

VTech Telecommunications Ltd May 10, 2012 To whom it may concern, Request for Permanent Confidentiality Under FCC Part 15 Certification FCC ID: EW780-8523-00 Request is hereby submitted by VTech Telecommunications Ltd. to withhold permanently from public review certain portions of the application for equipment certification for the referenced FCC identifiers. This request for confidentiality is made pursuant to 47 CFR § 0.457(d) and 0.459 of the FCC Rules. In particular, the following sections of the application are to be kept permanently confidential and VTech Telecommunications Ltd. reserves the right to discern which parties can obtain access to these information: • Schematics • Detailed Block diagrams • Detailed Operational/Functional Description The rationale for request for confidentiality is as followings: This information represents intellectual property of VTech Telecommunications Ltd . and it is subject to competition. We have invested considerable time and materials in research and development to produce the referenced product. Disclosure of the permanently confidential portions of this application to competitors would not only give them significant competitive advantages in developing similar products, but would also disclose successful implementation of unpublished, leading edge technology developed by us. If you have questions or need further information, please contact the undersigned. Regards, Samson Man Approbation Supervisor

VTech Telecommunications Ltd May 10, 2012 To whom it may concern, Request for Permanent Confidentiality Under FCC Part 15 Certification FCC ID: EW780-8523-00 Request is hereby submitted by VTech Telecommunications Ltd. to withhold permanently from public review certain portions of the application for equipment certification for the referenced FCC identifiers. This request for confidentiality is made pursuant to 47 CFR § 0.457(d) and 0.459 of the FCC Rules. In particular, the following sections of the application are to be kept permanently confidential and VTech Telecommunications Ltd. reserves the right to discern which parties can obtain access to these information: • Schematics • Detailed Block diagrams • Detailed Operational/Functional Description The rationale for request for confidentiality is as followings: This information represents intellectual property of VTech Telecommunications Ltd . and it is subject to competition. We have invested considerable time and materials in research and development to produce the referenced product. Disclosure of the permanently confidential portions of this application to competitors would not only give them significant competitive advantages in developing similar products, but would also disclose successful implementation of unpublished, leading edge technology developed by us. If you have questions or need further information, please contact the undersigned. Regards, Samson Man Approbation Supervisor

INTERTEK TESTING SERVICES External Photos FCC ID: EW780-8523-00 IC: 1135B-80852300 external photos - 1 of 3 HK12050056 Job Number HK12050056 Job Number INTERTEK TESTING SERVICES External Photos FCC ID: EW780-8523-00 IC: 1135B-80852300 external photos - 2 of 3 HK12050056 Job Number INTERTEK TESTING SERVICES External Photos FCC ID: EW780-8523-00 IC: 1135B-80852300 external photos - 3 of 3

INTERTEK TESTING SERVICES Internal photos FCC ID: EW780-8523-00 IC: 1135B-80852300 internal photos - 1 of 6 Base Unit assembly Base Unit Main PCB comp side (View 1) INTERTEK TESTING SERVICES Internal photos FCC ID: EW780-8523-00 IC: 1135B-80852300 internal photos - 2 of 6 Base Unit Main PCB comp side (View 2) Base Unit Main PCB solder side (View 1) INTERTEK TESTING SERVICES Internal photos FCC ID: EW780-8523-00 IC: 1135B-80852300 internal photos - 3 of 6 Base Unit Main PCB solder side (View 2) Base Unit PCB Antenna 1 INTERTEK TESTING SERVICES Internal photos FCC ID: EW780-8523-00 IC: 1135B-80852300 internal photos - 4 of 6 Base Unit PCB Antenna 2 Base Unit Charging Board front side INTERTEK TESTING SERVICES Internal photos FCC ID: EW780-8523-00 IC: 1135B-80852300 internal photos - 5 of 6 Base Unit Charging Board rear side Base Unit Oscillator PCB comp side INTERTEK TESTING SERVICES Internal photos FCC ID: EW780-8523-00 IC: 1135B-80852300 internal photos - 6 of 6 Base Unit Oscillator PCB solder side

INTERTEK TESTING SERVICES FCC ID:EW780-8523-00 RF exposure info - 1 of 1 For Maximum Permissible Exposure (MPE) evaluation of the base unit, the maximum power density at 20 cm from this mobile transmitter shall be less than the General Population / Uncontrolled MPE limit in OET Bulletin 65. For the base unit of tested model of TL7912, the maximum field strength measured (FS) was 112.4 dBμV/m. The distance (D) between the antenna and the equipment under test (EUT) was 3 meters. And the maximum source-based time-averaging duty factor in two-headset operation is 12.5%. From these data, the exposed power density at a distance (R) of 20cm from the center of radiation of the antenna can be calculated according to OET Bulletin 65 as follow: The radiated power (EIRP) = (FS*D) 2 / 30 = 52.13 mW The radiated (EIRP) source-based time-averaging output power = (52.13 * 0.125) mW = 6.52 mW The power density at 20 cm from the antenna = EIRP / 4πR 2 = 0.0013 mW cm -2 In the frequency range of 1,500 - 100,000MHz, the MPE limit is 1.0 mWcm -2 for general population and uncontrolled exposure. As the measured power density at 20cm from the transmitter is lower than the MPE limit, the compliance to the MPE limit can be ensured by indicating the minimum 20cm separation between the transmitter's radiating structures and body of the user or nearby persons. The following RF exposure statement is proposed to be included in the user manual: “ FCC RF Radiation Exposure Statement Caution: To maintain compliance with the FCC’s RF exposure guidelines, place the base unit at least 20cm from nearby persons.”

INTERTEK TESTING SERVICES 26dB Emission Bandwidth Plots FCC ID: EW780-8523-00 26bw - 1 of 1 A0 Base unit, Lowest channel, Traffic carrier Base unit, Highest channel, Traffic carrier

Report No.: HK12050056 Model: TL7912 Mode: Headset On-Line PC’s AC Mains Ctrl No.: NA 150 kHz30 MHz 1 PK CLRWR 2 AV CLRWR SGL TDS 6DB dBμV dBμV AC RBW 9 kHz MT 1 s PREAMP OFFAtt 10 dB AUTO 1 MHz10 MHz 0 10 20 30 40 50 60 70 80 90 100 CF15MAV CF15MQP Date: 15.MAY.2012 16:01:12 Report No.: HK12050056 Model: TL7912 Mode: Headset On-Line PC’s AC Mains Ctrl No.: NA EDIT PEAK LIST (Final Measurement Results) Trace1: CF15MQP Trace2: CF15MAV Trace3: --- TRACE FREQUENCY LEVEL dBμV DELTA LIMIT dB 1 Quasi Peak 154.5 kHz 45.30 L1 gnd -20.44 2 CISPR Average190.5 kHz 36.23 N gnd -17.78 1 Quasi Peak 217.5 kHz 37.77 N gnd -25.13 1 Quasi Peak 298.5 kHz 31.36 L1 gnd -28.91 2 CISPR Average514.5 kHz 27.38 N gnd -18.61 2 CISPR Average1.473 MHz 29.75 L1 gnd -16.24 1 Quasi Peak 2.1165 MHz 34.87 L1 gnd -21.12 2 CISPR Average2.1165 MHz 31.36 L1 gnd -14.63 1 Quasi Peak 2.9445 MHz 41.61 L1 gnd -14.39 2 CISPR Average2.949 MHz 38.80 L1 gnd -7.19 1 Quasi Peak 3.012 MHz 43.96 L1 gnd -12.03 2 CISPR Average3.2685 MHz 44.60 L1 gnd -1.39 1 Quasi Peak 4.209 MHz 32.62 N gnd -23.37 2 CISPR Average4.227 MHz 35.43 N gnd -10.56 1 Quasi Peak 9.2175 MHz 41.19 N gnd -18.80 2 CISPR Average9.2175 MHz 39.91 N gnd -10.08 1 Quasi Peak 15.36 MHz 37.90 N gnd -22.09 2 CISPR Average15.36 MHz 35.40 N gnd -14.59 1 Quasi Peak 17.6865 MHz 35.52 N gnd -24.47 2 CISPR Average21.5025 MHz 35.30 N gnd -14.69 Date: 15.MAY.2012 16:00:55 Report No.: HK12050056 Model: TL7912 Mode: Standby PC’s AC Mains Ctrl No.: NA 150 kHz30 MHz 1 PK CLRWR 2 AV CLRWR SGL TDS 6DB dBμV dBμV AC RBW 9 kHz MT 1 s PREAMP OFFAtt 10 dB AUTO 1 MHz10 MHz 0 10 20 30 40 50 60 70 80 90 100 CF15MAV CF15MQP Date: 15.MAY.2012 15:34:58 Report No.: HK12050056 Model: TL7912 Mode: Standby PC’s AC Mains Ctrl No.: NA EDIT PEAK LIST (Final Measurement Results) Trace1: CF15MQP Trace2: CF15MAV Trace3: --- TRACE FREQUENCY LEVEL dBμV DELTA LIMIT dB 1 Quasi Peak 150 kHz 47.20 L1 gnd -18.79 2 CISPR Average195 kHz 35.35 N gnd -18.46 1 Quasi Peak 213 kHz 39.63 L1 gnd -23.45 2 CISPR Average258 kHz 31.99 N gnd -19.50 1 Quasi Peak 321 kHz 35.83 N gnd -23.84 2 CISPR Average514.5 kHz 28.45 N gnd -17.55 2 CISPR Average1.0905 MHz 28.79 N gnd -17.20 2 CISPR Average1.4775 MHz 29.72 N gnd -16.27 1 Quasi Peak 1.9995 MHz 37.93 L1 gnd -18.06 2 CISPR Average1.9995 MHz 35.56 L1 gnd -10.43 1 Quasi Peak 2.9535 MHz 44.30 L1 gnd -11.69 2 CISPR Average2.9535 MHz 41.18 L1 gnd -4.81 2 CISPR Average3.0165 MHz 42.05 L1 gnd -3.94 1 Quasi Peak 3.1605 MHz 41.05 L1 gnd -14.94 1 Quasi Peak 4.299 MHz 35.70 N gnd -20.29 2 CISPR Average4.3035 MHz 30.97 N gnd -15.02 2 CISPR Average9.2175 MHz 38.47 N gnd -11.52 1 Quasi Peak 15.36 MHz 36.94 N gnd -23.05 2 CISPR Average15.36 MHz 35.13 N gnd -14.86 2 CISPR Average21.5025 MHz 34.37 N gnd -15.62 Date: 15.MAY.2012 15:34:44 Report No.: HK12050056 Model: TL7912 Mode: Headset Charging in Base Unit PC’s AC Mains Ctrl No.: NA 150 kHz30 MHz 1 PK CLRWR 2 AV CLRWR SGL TDS 6DB dBμV dBμV AC RBW 9 kHz MT 1 s PREAMP OFFAtt 10 dB AUTO 1 MHz10 MHz 0 10 20 30 40 50 60 70 80 90 100 CF15MAV CF15MQP Date: 15.MAY.2012 15:41:32 Report No.: HK12050056 Model: TL7912 Mode: Headset Charging in Base Unit PC’s AC Mains Ctrl No.: NA EDIT PEAK LIST (Final Measurement Results) Trace1: CF15MQP Trace2: CF15MAV Trace3: --- TRACE FREQUENCY LEVEL dBμV DELTA LIMIT dB 1 Quasi Peak 150 kHz 46.77 N gnd -19.22 2 CISPR Average190.5 kHz 35.79 N gnd -18.22 1 Quasi Peak 213 kHz 39.12 L1 gnd -23.95 1 Quasi Peak 298.5 kHz 32.18 L1 gnd -28.10 2 CISPR Average1.0275 MHz 27.96 N gnd -18.03 2 CISPR Average1.4775 MHz 29.05 L1 gnd -16.95 1 Quasi Peak 1.9995 MHz 37.36 L1 gnd -18.63 2 CISPR Average1.9995 MHz 35.37 L1 gnd -10.62 1 Quasi Peak 2.8995 MHz 39.73 L1 gnd -16.26 2 CISPR Average2.9535 MHz 40.47 L1 gnd -5.52 2 CISPR Average3.0795 MHz 41.97 L1 gnd -4.02 1 Quasi Peak 3.1425 MHz 44.53 L1 gnd -11.47 2 CISPR Average4.236 MHz 31.76 N gnd -14.23 1 Quasi Peak 9.2175 MHz 39.91 N gnd -20.08 2 CISPR Average9.2175 MHz 39.45 N gnd -10.55 2 CISPR Average15.36 MHz 34.83 N gnd -15.16 2 CISPR Average21.5025 MHz 33.51 N gnd -16.48 1 Quasi Peak 27.6495 MHz 40.41 N gnd -19.58 2 CISPR Average27.6495 MHz 40.22 N gnd -9.77 Date: 15.MAY.2012 15:41:14 Report No.: HK12050056 Model: TL7912 Mode: Ringing PC’s AC Mains Ctrl No.: NA 150 kHz30 MHz 1 PK CLRWR 2 AV CLRWR SGL TDS 6DB dBμV dBμV AC RBW 9 kHz MT 1 s PREAMP OFFAtt 10 dB AUTO 1 MHz10 MHz 0 10 20 30 40 50 60 70 80 90 100 CF15MAV CF15MQP Date: 15.MAY.2012 15:47:55 Report No.: HK12050056 Model: TL7912 Mode: Ringing PC’s AC Mains Ctrl No.: NA EDIT PEAK LIST (Final Measurement Results) Trace1: CF15MQP Trace2: CF15MAV Trace3: --- TRACE FREQUENCY LEVEL dBμV DELTA LIMIT dB 1 Quasi Peak 154.5 kHz 46.13 N gnd -19.62 2 CISPR Average195 kHz 35.23 N gnd -18.58 1 Quasi Peak 258 kHz 38.21 L1 gnd -23.28 1 Quasi Peak 321 kHz 35.32 N gnd -24.35 2 CISPR Average1.0905 MHz 28.80 N gnd -17.19 2 CISPR Average1.4775 MHz 28.37 L1 gnd -17.62 2 CISPR Average1.9995 MHz 35.40 L1 gnd -10.59 1 Quasi Peak 2.049 MHz 33.62 L1 gnd -22.37 1 Quasi Peak 2.8815 MHz 40.61 L1 gnd -15.38 2 CISPR Average2.949 MHz 40.60 L1 gnd -5.39 1 Quasi Peak 3.0795 MHz 44.68 L1 gnd -11.31 2 CISPR Average3.0795 MHz 41.59 L1 gnd -4.41 1 Quasi Peak 4.1955 MHz 29.86 N gnd -26.13 2 CISPR Average4.2315 MHz 31.45 N gnd -14.54 2 CISPR Average9.2175 MHz 39.86 N gnd -10.13 1 Quasi Peak 10.203 MHz 33.92 N gnd -26.07 1 Quasi Peak 15.36 MHz 37.44 N gnd -22.55 2 CISPR Average15.36 MHz 35.30 N gnd -14.69 1 Quasi Peak 17.664 MHz 33.65 N gnd -26.34 2 CISPR Average21.5025 MHz 34.19 N gnd -15.80 Date: 15.MAY.2012 15:47:39 Report No.: HK12050056 Model: TL7912 Mode: Conference Call PC’s AC Mains Ctrl No.: NA 150 kHz30 MHz 1 PK CLRWR 2 AV CLRWR SGL TDS 6DB dBμV dBμV AC RBW 9 kHz MT 1 s PREAMP OFFAtt 10 dB AUTO 1 MHz10 MHz 0 10 20 30 40 50 60 70 80 90 100 CF15MAV CF15MQP Date: 15.MAY.2012 16:13:57 Report No.: HK12050056 Model: TL7912 Mode: Conference Call PC’s AC Mains Ctrl No.: NA EDIT PEAK LIST (Final Measurement Results) Trace1: CF15MQP Trace2: CF15MAV Trace3: --- TRACE FREQUENCY LE…

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INTERTEK TESTING SERVICES Unwanted Emission Inside The Sub-Band Plots FCC ID: EW780-8523-00 inband - 1 of 1 Base unit, Lowest channel, Traffic carrier Base unit, Highest channel, Traffic carrier A0

INTERTEK TESTING SERVICES Peak Transmit Power Plots FCC ID: EW780-8523-00 IC: 1135B-80852300 peaktp - 1 of 2 A0 Base unit, Lowest channel, Traffic carrier1 Base unit, Middle channel, Traffic carrier1 INTERTEK TESTING SERVICES Peak Transmit Power Plots FCC ID: EW780-8523-00 IC: 1135B-80852300 peaktp - 2 of 2 A0 Base unit, Highest channel, Traffic carrier1

INTERTEK TESTING SERVICES Power Spectral Density Plots FCC ID: EW780-8523-00 psd - 1 of 1 A0 Base unit, Lowest channel, Traffic carrier Base unit, Highest channel, Traffic carrier

- The test report only allows to be revised within the retention period unless further standard or the requirement was noticed. - This report is for the exclusive use of Intertek's Client and is provided pursuant to the agreement between Intertek and its Client. Intertek's responsibility and liability are limited to the terms and conditions of the agreement. Intertek assumes no liability to any party, other than to the Client in accordance with the agreement, for any loss, expense or damage occasioned by the use of this report. Only the Client is authorized to permit copying or distribution of this report and then only in its entirety. Any use of the Intertek name or one of its marks for the sale or advertisement of the tested material, product or service must first be approved in writing by Intertek. The observations and test results in this report are relevant only to the sample tested. This report by itself does not imply that the material, product, or service is or has ever been under an Intertek certification program. Intertek Testing Services Hong Kong Ltd. 2/F., Garment Centre, 576 Castle Peak Road, Kowloon, Hong Kong. Tel: (852) 2173 8888 Fax: (852) 2785 5487 Website: www.hk.intertek-etlsemko.com VTech Telecommunications Ltd. Application For 47 CFR Part 15: 2010 Certification RSS-213 Issue 2, December 2005 Equipment Certification Unlicensed Personal Communication Service Devices/ 2 GHz License-exempt Personal Communications Service Devices FCC ID: EW780-8523-00 Base Unit of Model: TL7810, TL7812, TL7910, TL7912, HC8810, HC8812 IC: 1135B-80852300 Base Unit of Model: TL7810, TL7812, TL7910, TL7912, HC8810, HC8812 Test Report Number: HK12050056-1 Issue Date: June 14, 2012 MN/KY INTERTEK TESTING SERVICES Test Report Number: HK12050056-1 Page 1 of 58 FCC ID: EW780-8523-00 IC: 1135B-80852300 Table of Contents 1.0 Summary of Test Results........................................................................................ 4 2.0 General Description................................................................................................. 7 2.1 Product Description ................................................................................................. 7 2.2 Technical Description .............................................................................................. 7 2.3 Test Methodology.................................................................................................... 8 2.4 Test Facility............................................................................................................. 8 3.0 System Test Configuration.................................................................................... 10 3.1 Justification ........................................................................................................... 10 3.2 Conducted Emission Test Configuration ................................................................ 11 3.3 Conducted Monitoring and Operational Test Configuration.................................... 11 3.4 EUT Exercising Software....................................................................................... 11 3.5 Details of EUT and Description of Peripherals....................................................... 12 3.6 Measurement Uncertainty ..................................................................................... 12 4.0 Measurement Results............................................................................................ 14 4.1 Antenna Requirement........................................................................................... 14 4.2 Digital Modulation Techniques............................................................................... 14 4.3 Emission Bandwidth.............................................................................................. 15 4.4 Directional Gain of the Antenna ............................................................................. 16 4.5 Peak Transmit Power ............................................................................................ 17 4.6 Power Spectral Density ......................................................................................... 18 4.7 Automatic Discontinuation of Transmission............................................................ 19 4.8 Unwanted Emission Inside the Sub-Band .............................................................. 20 4.9 Emissions Outside the Sub-Band .......................................................................... 21 4.9.1 Radiated Emissions Configuration Photographs ................................................. 22 4.9.2 Radiated Emissions Data ................................................................................... 22 4.9.3 Field Strength Calculation................................................................................... 32 4.9.4 Average Factor Calculation and Transmitter ON Time Measurements ................ 33 4.10 AC Power Line Conducted Emissions ................................................................. 34 4.10.1 AC Power Line Conducted Emissions Configuration Photographs .................... 35 4.10.2 AC Power Line Conducted Emissions Data ...................................................... 35 4.11 Radio Frequency Radiation Exposure.................................................................. 36 4.12 Radio Frequency Exposure Compliance.............................................................. 36 4.13 Frame Repetition Stability .................................................................................. 37 4.14 Frame Period and Jitter ...................................................................................... 38 4.15 Carrier Frequency Stability .................................................................................. 39 4.16 Monitoring Threshold........................................................................................... 41 4.16.1 Lower Monitoring Threshold .…

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INTERTEK TESTING SERVICES The Worst Case Configuration Photographs - Mode: Transmission FCC ID: EW780-8523-00 IC: 1135B-80852300 config photos (radiated emission - base unit) - 1 of 1 Radiated Emission - Base Unit Front View Rear View INTERTEK TESTING SERVICES The Worst Case Configuration Photographs - Mode: Headset On-line (PC’s AC Mains) FCC ID: EW780-8523-00 IC: 1135B-80852300 config photos (conducted emission) - 1 of 2 Conducted Emission Front View Right Side View INTERTEK TESTING SERVICES The Worst Case Configuration Photographs - Mode: Headset On-line (PC’s AC Mains) FCC ID: EW780-8523-00 IC: 1135B-80852300 config photos (conducted emission) - 2 of 2 Conducted Emission Left Side View