ACEW425900MHz 40 Channel Analog Cordless Phone

Walker Ameriphone A Division of Plantronics, Inc. 4289 Bonny Oaks Drive, Suite 106 Chattanooga, TN 37406 1-800-552-3368 www.mywalker.com Rev.1 (10-02) E N G L I S H E S P A Ñ O L F R A N Ç A I S 900 MHz Cordless Telephone with Clarity ® Power ™ Technology Model W425 Owners Manual Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 W425 Features . . . . . . . . . . . . . . . . . . . . . . . . . .6 Connecting Your Telephone . . . . . . . . . . . . . . . . . .10 Choosing a Location . . . . . . . . . . . . . . . . . . . . . . .10 Desktop Installation . . . . . . . . . . . . . . . . . . . . . . . .11 Wall Mount Instructions . . . . . . . . . . . . . . . . . . . . .12 Handset Battery Charging . . . . . . . . . . . . . . . . . . .13 Operating Your Telephone . . . . . . . . . . . . . . . . . . . . . . . .14 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14 Memory Storage . . . . . . . . . . . . . . . . . . . . . . . . .18 Making and Receiving Calls . . . . . . . . . . . . . . . . . .19 Trouble Shooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20 FCC Requirements and Regulations . . . . . . . . . . . . . . . . . .22 Warranty and Service . . . . . . . . . . . . . . . . . . . . . . . . . . .24 2 Table of Contents 3 E N G L I S H When using your telephone equipment, basic safety precautions should always be followed to reduce the risk of fire, electric shock and injury to persons including the following: 1. Read and understand all instructions. 2. Follow all warnings and instructions marked on the telephone. 3. Do not use this telephone near a bathtub, wash basin, kitchen sink or laundry tub, in a wet basement, near a swimming pool or anywhere else there is water. 4. Avoid using a telephone (other than a cordless type) during an electrical storm. There may be a remote risk of electrical shock from lightning. 5. Do not use the telephone to report a gas leak in the vicinity of the leak. 6. Unplug this telephone from the wall outlets before cleaning. Do not use liquid cleaners or aerosol cleaners on the telephone. Use a damp cloth for cleaning. 7. Place this telephone on a stable surface. Serious damage and/or injury may result if the telephone falls. 8. Do not cover the slots and openings on this telephone. This telephone should never be placed near or over a radiator or heat register. This telephone should not be placed in a built-in installation unless proper ventilation is provided. 9. Operate this telephone using the electrical voltage as stated on the base unit or the owner’s manual. If you are not sure of the voltage in your home, consult your dealer or local power company. 10.Do not place anything on the power cord. Install the telephone where no one will step or trip on the cord. 11. Do not overload wall outlets or extension cords as this can increase the risk of fire or electrical shock. 12. Never push any objects through the slots in the telephone. They can touch dangerous voltage points or short out parts that could result in a risk of fire or electrical shock. Never spill liquid of any kind on the telephone. 13. To reduce the risk of electrical shock, do not take this phone apart. Opening or removing covers may expose you to dangerous voltages or other risks. Incorrect reassembly can cause electric shock when the appliance is subsequently used. 14. Unplug this product from the wall outlet and refer servicing to the manufacturer under the following conditions: A. When the power supply cord or plug is frayed or damaged. B. If liquid has been spilled into the product. C. If the telephone has been exposed to rain or water. D. If the telephone does not operate normally by following the operating instructions. Adjust only those controls that are covered by the operating instructions. Improper adjustment may require extensive work by a qualified technician to restore the telephone to normal operation. E. If the telephone has been dropped or the case has been damaged. F. If the telephone exhibits a distinct change in performance. 15. Never install telephone wiring during a lightning storm. 16. Never install telephone jacks in wet locations unless the jack is specifically designed for wet locations. 17. Never touch uninsulated telephone wires or terminals unless the telephone line has been disconnected at the network interface. 18. Use caution when installing or modifying telephone lines 19. Use only the power cord and batteries indicated in this manual. Do not dispose of batteries in a fire. They may explode. Check with local codes for possible special disposal instructions. SAVE THESE INSTRUCTIONS Important Safety Instructions 4 Caution:Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacturer. Dispose of batteries according to the manufacturer's instructions. 1. Use only the approved battery pack in the handset of your cordless phone. For Handset Unit:3.6 V 700mAHr NiCd Rechargeable Battery GP70AAS3BMJZ GPI International Ltd 2. Do not dispose of the battery in a fire as it may explode. Check with local codes for possible special disposal instructions. 3. Do not open or mutilate the battery. Released electrolyte is corrosive and may cause damage to the eyes and skin. It may be toxic if swallowed. 4. Exercise care in handling batteries in order not to short the battery with conducting materials such as rings, bracelets and keys. The battery or conduction material may overheat and cause burns. 5. Charge the battery (ies) provided with or identified for use with this product only in accordance with the instructions and limitations specified in this manual. 6. Observe proper polarity orientation between the battery pack and the battery charger. Safety Instructions for Batteries 5 E N G L I S H The following items are included as part of the CS-03 Requirements. The standard connecti…

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23 E N G L I S H Part 15 of FCC Rules Interference Information This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Your W425 has been tested and found to comply with the limits of a Class B digital device, pursuant to Part 15 of FCC rules. These limits are designed to provide reasonable protection against harmful interefence in residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation; if this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, you are encouraged to try to correct the interference by one of the following measures: 1. Where it can be done safely, reorient the receiving television or radio antenna. 2. To the extent possible, relocate the television, radio or other receiver with respect to the telephone equipment. (This increases the separation between the telephone equipment and the receiver.) 3. Connect the telephone equipment into an outlet on a circuit difference from that to which the television, radio, or other receiver is connected. 4. Consult the dealer or an experienced radio/TV technician for help. CAUTION:Changes or modifications not expressly approved by the manufacturer responsible for compliance could void the user’s authority to operate the equipment. THE PARTY RESPONSIBLE FOR PRODUCT COMPLIANCE Walker, A Division of Plantronics, Inc. 4289 Bonny Oaks Drive, Suite 106 Chattanooga, TN 37406 Telephone: 800.552.3368 Federal Communications Commissions Requirements

Revision 02 W425 Base Unit Block Diagram Revision 02 RF Module (Base) Block Diagram Revision 02 W425 Handset Unit Block Diagram Revision 02 RF Module (Handset) Block Diagram

External photos FCC ID: ACEW425 External photos FCC ID: ACEW425

Revision 02 W425 Circuit Description CONTENT 1. Introduction 2. Functional Blocks of the Handset 3. Handset Unit Circuit Block Description 4. Functional Blocks of the Base unit 5. Base Unit Circuit Block Description 6. Functional Blocks of the RF Module 7. RF Module Circuit Block Description 8. W425 Basic Operation 9. Test Mode Operation Revision 02 1. Introduction The model W425 is a 40 channel (902 MHz - 928 MHz) cordless telephone. This unit is made up of two parts: a. A Handset unit. b. A Base unit. 2. Functional Blocks of the Handset The block diagram of W425 handset unit is as shown below. It is made up of the following parts: 2.1 Keyboard Matrix, Switches and Function LED 2.2 MCU and MCU Interface 2.3 RF Module 2.4 Compander 2.5 Data Shaper 2.6 Charge and Control 2.7 Low Battery Detector 2.8 Buzzer 2.9 Audio Circuit Revision 02 W425 Handset Unit Block Diagram Revision 02 3. Handset Unit Circuit Block Description 3.1 Keyboard Matrix, Switches and Function LED The keyboard consists of the following keys: • FIRE – one touch memory key • POL – one touch memory key • AMB – one touch memory key • CHN – for changing RF carrier frequency • TALK – for On/Off hook control • MEM – for memory program and dialing • 1, 2, 3, 4, 5, 6, 7, 8, 9, *, 0, # – numeric keys • FLASH – provides timed On/Off hook function • MUTE – turns Off/On the handset microphone • RDL/P – redials the last number or provides a pause during dialing. The keyboard is connected to Pins 19 to 26 the MCU (U3). The switches consist of the followings: • BOOST CLARITY POWER – for On/Off the receiver amplifier gain • RINGER ON/OFF – turns On/Off the ringer buzzer They are connected to pins 24 and 21 of MCU. The function LEDs consist of the followings: • MICMUTE (LED2 - Red) – Located under the “MUTE” key. On/Off when microphone is Off/On • INUSE (LED17 – Green; LED4, LED6 and LED18 - Red) – Located under the “TALK” key and the handset antenna. On/Off when telephone is Off-hook/On-hook • BOOST (LED17 – RED) – Located under the “TALK” key. On/Off when the receiver amplifer extra gain is On/Off • BACKLIGHT (LED3, LED5, LED7, LED8, LED9, LED10, LED11, LED12, LED13, LED14, LED15, LED16 – Green) – Located under the keyboard. On for a short time when any key is pressed • RINGER (LED4, LED6 and LED18 - Red) – Located in the handset antenna. Flashes when the telephone line rings These LEDs are controlled by pins 7, 9, 10, 11 and 12 of MCU. 3.2 MCU and MCU Interface The controller of the handset is U3. The frequency of the crystal used is 4 MHz. Revision 02 It controls the functions of the handset through the keyboard interface and signals from the base unit. The data to and from the base goes through pin 31 (data from base) and pin 34 (data to base). 3.3 RF Module For operation and frequency see RF module section. It receives the PLL data through pins 5, 6, 7 from MCU pins 1, 43 and 44. The antenna located at the top of the unit and is permanent attached to RF module through a copper wire. 3.4 Compander A compander U5 is used for improving the S/N of transmit and receive audio signals. 3.5 Data Shaper The information which sent from base unit is recovered by the amplifier Q7 and Q9. 3.6 Charge and Control ZD1, D5, D6, D7, D9, D10, D11, Q5 provide polarity and over-voltage protection during battery charging. The charge signal is detected by pin 29 of the MCU. When the handset is put into the base cradle, a negative pulse is sent to pin 14 of the MCU. 3.7 Low Battery Detector The battery voltage is detected by U4D and the signal is sent to pin 4 of MCU. 3.8 Buzzer Q2 is the buzzer signal amplifier and driven by the MCU pins 2, 32, 33. 3.9 Audio Circuit Speech signal is picked up by the internal microphone M1 and sent to the telephone line through amplifier U4C, the compander U5 and the RF module. The incoming speech is received through the RF module, the compander, the amplifier U4A and U1. When BOOST is On, extra gain is inserted in this audio path. The headset jack is for external speaker and microphone. Revision 02 4. Functional Blocks of the Base unit The block diagram of W425 base unit is as shown below. It is made up of the following parts: 4.1 Power Supply 4.2 MCU and MCU Interface 4.3 RF Module 4.4 Compander 4.5 Data Shaper 4.6 Charge and Control 4.7 Telephone Line Interface 4.8 Ring Signal Detector 4.9 Base Ringer 4.10 Keyboard Matrix, Switches and Function LED Revision 02 W425 Base Unit Block Diagram Revision 02 5. Base Unit Circuit Block Description 5.1 Power Supply The base unit is powered by an AC adapter (9V dc). The voltage regulator (BU5) regulates the input DC to 5V. This provides power to every part of the unit. 5.2 MCU and MCU Interface The controller of the base is BU2 and controls the function of the unit. The frequency of the crystal used is 8 MHz. It communicates with the handset through the RF module. PLL data to the RF module BMD1 is sent through pins 1, 43 and 44. The data between Handset and Base is via the pin 31 (data from handset) and pin 34 (data to handset) through the RF module. The transmitter power is controlled by the signal from pin 35 of MCU. The MCU monitors ring signal from telephone line through the telephone line interface at pin 29. MCU pins 19 to 24 provide DTMF signal through a resistor ladder connected at these pins. The keyboard interface is provided by pins 8 to 12. 5.3 RF Module For operation and frequency see RF module section.. It receives the PLL data through pins 5, 6, 7 from MCU pins 1, 43 and 44. The antenna (~130mm total length) partly located inside the plastic rod at the side the unit is permanent attached to RF module. 5.4 Compander The compander BU1 is used for improving the S/N of the transmit and receive audio signal. 5.5 Data Shaper The information sent from handset unit is recovered by the amplifier BQ2 and BQ3. 5.6 Charge and Control BQ15 detects the handset charging current and sends signal to MCU pin 30. BQ14 detects the 9V supply and sends a negative pulse to MCU pin 14. Re…

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• The test results reported in this report shall refer only to the sample actually tested and shall not refer or be deemed to refer to bulk from which such a sample may be said to have been obtained. • This report shall not be reproduced except in full without prior authorization form Intertek Testing Services Limited FCC ID: ACEW425 Intertek Testing Services Hong Kong Ltd. 2/F., Garment Centre, 576 Castle Peak Road, Kowloon, Hong Kong. Tel: (852) 2173 8888 Fax: (852) 2741 1693 Walker Equipment Corporation Application For Certification 900MHz 40 Channel Analog Modulation Cordless Phone (FCC ID: ACEW425) WO# 0214135 TL/Ann Choy November 22, 2002 INTERTEK TESTING SERVICES FCC ID: ACEW425 i LIST OF EXHIBITS INTRODUCTION EXHIBIT 1: General Description EXHIBIT 2: System Test Configuration EXHIBIT 3: Emission Results EXHIBIT 4: Equipment Photographs EXHIBIT 5: Product Labelling EXHIBIT 6: Technical Specifications EXHIBIT 7: Instruction Manual EXHIBIT 8: Security Code Information INTERTEK TESTING SERVICES FCC ID: ACEW425 ii MEASUREMENT/TECHNICAL REPORT Walker Equipment Corporation - MODEL: W-425 FCC ID: ACEW425 This report concerns (check one:) Original Grant X Class II Change Equipment Type : Cordless Telephone (example : computer, modem, transmitter, etc.) Deferred grant requested per 47 CFR 0.457(d)(1)(ii)? Yes No X If yes, defer until : date Company Name agrees to notify the Commission by: date of the intended date of announcement of the product so that the grant can be issued on that date. Transition Rules Request per 15.37 ? Yes No X If no, assumed Part 15, Subpart C for intentional radiator - the new 47 CFR [12-18-01 Edition] Provision. Report prepared by: Tommy Leung Intertek Testing Services. 2/F., Garment Centre, 576 Castle Peak Road, Kowloon, Hong Kong. Phone : 852-2173-8538 Fax: 852-2741-1693 INTERTEK TESTING SERVICES FCC ID: ACEW425 iii Table of Contents 1.0 General Description.........................................................................................................2 1.1 Product Description.........................................................................................................2 1.2 Related Submittal(s) Grants ............................................................................................3 1.3 Test Methodology ............................................................................................................3 1.4 Test Facility .....................................................................................................................3 2.0 System Test Configuration .................................................................................................5 2.1 Justification ......................................................................................................................5 2.2 EUT Exercising Software................................................................................................5 2.3 Support Equipment List and Description........................................................................6 2.4 Measurement Uncertainty ...............................................................................................7 2.5 Equipment Modification..................................................................................................7 3.0 Emission Results ...................................................................................................................9 3.1 Field Strength Calculation .............................................................................................10 3.2 Radiated Emission Configuration Photograph - Base Unit ..........................................11 3.3 Radiated Emission Data - Base Unit .............................................................................12 3.4 Radiated Emission Configuration Photograph - Handset .............................................15 3.5 Radiated Emission Data - Handset................................................................................16 3.6 Radiated Emission on the bandedge..............................................................................19 3.7 Line Conducted Configuration Photograph - Base Unit...............................................21 3.8 Line Conducted Emission Data - Base Unit .................................................................22 4.0 Equipment Photographs ...................................................................................................25 5.0 Product Labelling ...............................................................................................................27 6.0 Technical Specifications ....................................................................................................29 7.0 Instruction Manual ............................................................................................................31 8.0 Security Code Information ...............................................................................................33 INTERTEK TESTING SERVICES FCC ID: ACEW425 iv List of attached file Exhibit type File Description filename Test Report Test Report report.doc Operation Description Technical Description descri.pdf Test Setup Photo Radiated Emission for Base config photos.doc Test Setup Photo Radiated Emission for Handset config photos.doc Test Report Emission Plot emission.pdf Test Setup Photo Conducted Emission config photos.doc Test Report Conducted Emission Test Result conduct.pdf External Photo External Photo external photos.doc Internal Photo Internal Photo internal photos.doc Block Diagram Block Diagram block.pdf Schematics Circuit Diagram circuit.pdf ID Label/Location Label Artwork and Location label.pdf User Manual User Manual manual.pdf User Manual FCC Information fcc information.pdf INTERTEK TESTING SERVICES FCC ID: ACEW425 1 EXHIBIT 1 GENERAL DESCRIPTION INTERTEK TESTING SERVICES FCC ID: ACEW425 2 1.0 General Description 1.1 Product Description The W-425 is a 900MHz 40 Channel Ana…

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Intertek Testing Services ETL SEMKO Report No.:0214135 Talk Mode Ctrl No.:N/A PAGE 1 Tested By:Hong, Report No.:0214135 Scan Settings (1 Range) |--------- Frequencies -----------||----------- Receiver Settings ------------| Start Stop Step IF BW Detector M-Time Atten Preamp OpRge 450k 30M 5k 10k PK 20ms AUTO LN OFF 60dB Final Measurement: x QP Meas Time: 1 s Subranges: 16 Acc Margin: 20dB Transducer No. Start Stop Name 21 9k 30M EW0698 0 10 20 30 40 50 60 70 dBuV 80 0.45 30 MHz 110 FCC15B Intertek Testing Services ETL SEMKO Report No.:0214135 Talk Mode Ctrl No.:N/A Tested By:Hong, Report No.:0214135 Scan Settings (1 Range) |--------- Frequencies -----------||----------- Receiver Settings ------------| Start Stop Step IF BW Detector M-Time Atten Preamp OpRge 450k 30M 5k 10k PK 20ms AUTO LN OFF 60dB Final Measurement Results: no Results

The Worst Case Configuration Photographs FCC ID: ACEW425 Radiated Emission – Base Front View Rear View The Worst Case Configuration Photographs FCC ID: ACEW425 Radiated Emission – Handset Front View Rear View The Worst Case Configuration Photographs FCC ID: ACEW425 Conducted Emission Front View Rear View The Worst Case Configuration Photographs FCC ID: ACEW425 Conducted Emission Side View

The Worst Case Configuration Photographs FCC ID: ACEW425 Radiated Emission – Base Front View Rear View The Worst Case Configuration Photographs FCC ID: ACEW425 Radiated Emission – Handset Front View Rear View The Worst Case Configuration Photographs FCC ID: ACEW425 Conducted Emission Front View Rear View The Worst Case Configuration Photographs FCC ID: ACEW425 Conducted Emission Side View

The Worst Case Configuration Photographs FCC ID: ACEW425 Radiated Emission – Base Front View Rear View The Worst Case Configuration Photographs FCC ID: ACEW425 Radiated Emission – Handset Front View Rear View The Worst Case Configuration Photographs FCC ID: ACEW425 Conducted Emission Front View Rear View The Worst Case Configuration Photographs FCC ID: ACEW425 Conducted Emission Side View