Aethra The Voice Installation & User Manual
Contents
1. to 45 Storage 25 C to 55 CERTIFICATION UL FCC CE CSA 6 1 Use and storage conditions OPERATING TEMPERATURE 5 C 45 C OPERATING RELATIVE HUMIDITY 10 93 non condensino STORAGE TEMPERATURE 25 C 55 C 6 2 Reference regulations CE mark and reliability tests uloo ueui u29Y MMM d y jeu juo STORAGE TRANSPORT OPERATING CONDITIONS CONDUCTED EMISSIONS IRRADIATED EMISSIONS IMMUNITY SAFETY 26 CEI 50 3 CEI EN 60068 2 1 IEC 68 2 2 CEI 50 6 IEC 68 2 32 IEC 68 2 36 CEI 50 3 CEI EN 68068 2 1 IEC 68 2 2 IEC 68 2 3 IEC 68 2 14 CEI 50 6 IEC 68 2 31 IEC 68 2 32 IEC 68 2 36 CEI EN 55022 CEI EN 55022 CEI EN 50082 1 CEI EN 60950 CHAPTER 6 TECHNICAL SPECIFICATIONS uloo ueui u29Y MWWyJ d3ju jeu uo sjenuejy INSTALLATION AND USER S MANUAL REV 2 The Voice C This product complies with EEC 89 336 directive on electromagnetic compability EEC 73 23 directive Low Voltage on safey rules and EEC 91 263 directive on telecommunication devices as amended by EEC 92 31 and 93 68 directives CHAPTER 6 TECHNICAL SPECIFICATIONS 27 Technical Manuals Online http www tech man com uloo ueui u29Y MWWyJ d3ju jeu juo sjenuejy INSTALLATION AND USER S MANUAL REV 2 The Voice T REQUIREMENTS This equipment complies with Part 68 of the FCC rules On the rear pane2. 5 1 Preventive maintenance 5 2 Troubleshooting DO unplug the SUPPLY MODULE and the ACU before cleaning DO check cables for kinking or tearing especially in floor traffic areas DON T use volatile solvents to clean surfaces A clean soft cloth lightly moistened is usually adequate If a spray or paste cleaner is used DON T let it clog the microphone or loudspeaker openings DON T risk fire or electrical shock by placing the SUPPLY MODULE on a wet surface or spilling liquid on it DON T place the SUPPLY MODULE on a radiator or other heat sources No dial tone 1 Make sure the power supply cable is plugged into a working 120 Vac 60 Hz outlet 2 Verify that the green light glows steadily 3 Make sure telephone line is plugged into telephone line connector on the SUPPLY MODULE Make sure telephone line is not a digital PABX line but is a standard analog telephone line Dialed party can t hear conversation originating from your end of the call No conference operation 22 1 Verify that the mute and hold functions are off Make sure telephone line is plugged into telephone line connector on the SUPPLY MODULE Make sure the power supply cable is plugged into a working 120 Vac 60 Hz outlet Verify that the green light glows steadily Make sure telephone line is plugged into telephone line connector on the SUPPLY MODULE Make sure the ACU is properly connected to the SUPPLY MOD
3. switch is available with SILENT LOW and HIGH positions on the bottom side of the UNIT 3 2 electing pulse dialing Press SHIFT then press REDIAL to select the PULSE dialing mode The UNIT reverts to tone mode when cycled off or when the SHIFT REDIAL is pressed again You will hear a tone for each toggle CHAPTER 3 USING THE AUDIO CONFERENCE UNIT 13 uloo ueui u29Y MWWyJ d3ju jeu uo sjenuejy The Voice INSTALLATION AND USER S MANUAL REV 2 3 3 Outgoing calls Press A and dial the desired telephone number The three LEDs on the corners of the AUDIO CONFERENCING UNIT will switch to green N After the conversation has finished press the m and the three LEDs will turn yellow 3 4 Incoming calls When a call comes in a ringing signal is heard At the same time the LEDs flash Press key to activate the hands free function 3 5 Phonebook 3 5 1 Memorization Check that the handset is on hook e then press SHIFT and FLASH the music and the yellow LED s flashing indicate the phonebook mode Select the memorization code 00 99 on the keypad example sur Fast 0 2 The green LED s start flashing to indicate that the location is free Dial the telephone number maximum 40 figures Press FLASH to end the operation You will hear music that confirms the number memorization 14 CHAPTER 3 USING THE AUDIO CONFERENCE UNIT uloo ueui u29Y MWWJ d3ju jeuijuo sjenu
4. AUDIO CONFERENCING UNIT reverts to the default volume level 3 8 Redial To dial the last telephone number dialed press REDIAL 3 9 Phone For privacy you may connect a regular phone to the Audio Supply Module You may revert to using the handset at any time When the UNIT is off lift the heandset The three LEDs on the corner will go off You may then use the handset to establish a call to dial a telephone number or to end the call To go back to hands free mode hang up the handset The three LEDs will turn yellow Once a call is connected you may also revert to using the handset First lift the handset the three led on the corner will go off To return to hands free mode press A and hang up the handset 3 10 Mute To cut off outgoing sound during a call press MUTE The LEDs will turn red Your microphones are off and your voice is not being transmitted To switch off the mute press the MUTE key again The LEDs will turn green 16 CHAPTER 3 USING THE AUDIO CONFERENCE UNIT uloo ueui u29Y MWWyJ d3ju jeu uo INSTALLATION AND USER S MANUAL REV 2 The Voice NOTE you can also mute the entire system by depressing the mute button on either of the 2 extension microphones 3 11 Hold To mute both the outgoing and incoming sound during a call press SHIFT then MUTE The LEDs will turn on and flash red While the hold function is being used all microphones and your speaker are off T
5. SHOOTING AND MAINTENANCE 23 Technical Manuals Online http www tech man com uloo ueui u29Y MMM d Y jeu juo INSTALLATION AND USER S MANUAL REV 2 The Voice 6 TECHNICAL SPECIFICATIONS AUDIO BANDWIDTH LOUDSPEAKER VOLUME MICROPHONES ADAPTIVE ACOUSTIC ECHO CANCELLER ADAPTIVE LINE ECHO CANCELLER ADAPTIVE NOISE REDUCTION FILTER ADAPTIVE ECHO REDUCTION AUX OUTPUTS NETWORK INTERFACE POWER REQUIREMENTS DIMENSIONS WEIGHT LINE VOLTAGE TEST FREQUENCY MAXIMUM TOTAL HARMONIC DISTORTION MUTING LINE LOSS COMPENSATOR RANGE SPEECH LEVEL COMPENSATOR RANGE 200Hz 3400Hz Adjustable 12dB 12dB Maximum sound level 78dBSPL 3 per module unidirectional hypercardioid type ERLE 30 dB typical ERLE 36 typical Noise attenuation 10 dB typical Residual Echo Level is reduced at the adaptive estimation of the Tx noise level Line Level gt 100 Ohm RJ 11 Type single line analog on PSTN 104 126 VAC 188mA maximum ACU 30cm x 30cm x 7cm SUPPLY MODULE 10cm x 20cm x 6 5cm ACU 1 Kg SUPPLY MODULE 0 850 Kg 115 230 VAC 60 50 Hz with Voltage selector switch 1kHz Tel Line output 0 596 at 12dBm Speaker output 0 5 at 78 dBSPL 100dB minimum attenuation of transmit signal 12dB 6dB 12dB 6dB CHAPTER 6 TECHNICAL SPECIFICATIONS 25 The Voice INSTALLATION AND USER S MANUAL REV 2 AMBIENT TEMPERATURE RANGE Operating 5
6. ULE CHAPTER 5 TROUBLESHOOTING AND MAINTENANCE d y jeuiuo sjenue y e21uu29 UlO2 UEUI U29 MMW INSTALLATION AND USER S MANUAL REV 2 The Voice ACU loudspeaker sound is too Press the VOL key on the ACU until an adequate low volume is reached ACU loudspeaker sound is too Press the VOL key on the ACU until an adequate loud volume is reached Received speech intermittent If remote party is using a teleconferencing system without being interrupted by tell them to move their system away from large local sounds objects or reflective surfaces 2 Bad telephone connection remote party may be using a cellular phone or a radio telephone Hang up and try calling again Low level conversation or Cross talk on the telephone line or in the PBX may pulses can be heard from be present Hang up and re dial If the condition loud speaker persists contact your telephone service provider Remote party complains that Move your ACU away from any large reflective your voice is garbled surfaces Volume will go up but not Volume is at the minimum or maximum level already down or vice versa Module emits a howling sound 1 make sure the telephone line is connected to the SUPPLY MODULE 2 Make sure the telephone line is a standard analog telephone network No ringing signal sounds to Check switch settings on ACU Move Ringer tone indicate incoming calls Switch to LOW or HIGH position CHAPTER 5 TROUBLE
7. USING THE AUDIO CONFERENCING UNIT esee 13 Adjusting the phone ringer volume ssssssssseeeeeneeeneeen nennen 13 selecting pulse d lirig ERE EE aes 13 Qutgoihg calls erdt alie aa HS OH t A Oh 14 Incoming Rea a ee Se eed det tenendas 14 PHONEDOOK o ae Ca e ene d ea de eai ER RARE 14 Me moriZalion niece ete rere tesis a x i eR ed Ue eee OX YE c eek 14 Cancelling the operation 15 Cancelling the number sssssssssssssseseeeeeeee enne 15 Location NOt Meeps T 15 Calling a memorized 15 Speaker Vol me aeren oe i ehe e ee e ed deed 16 Redial rotoi AONT 16 Phones cista coe ccrto oer 16 Mate ahta aia 16 TABLE CONTENTS ll uloo ueui u29Y MMM d Y jeu juo The Voice INSTALLATION AND USER S MANUAL REV 2 Selle Old diccns teca 17 he care teehee cette ee deett deaur Mb ses Mme Me bes aM cda s 17 93 195 tfa corder OUtpUt s coo os eco tea e caet 17 3 14 Switch settings 17 4 USING EXTENSION MICROPHONES 19 4 1 Connecting extension microphones sssss
8. e y INSTALLATION AND USER S MANUAL REV 2 The Voice 3 5 2 Cancelling the operation To cancel the operation press SHIFT and FLASH and then follow the instructions for memorization 3 5 3 Cancelling the number To cancel a number from the phonebook digit J If the red LED S start flashing press FLASH to cancel the number J If the green LED S start flashing the selected location is free 3 5 4 Location not free If flashing the red LED s indicate that the location is not free To cancel the operation press SHIFT and FLASH and then follow the instructions for memorization 3 6 Calling a memorized number Check the code that corresponds to the user name in the phonebook Press A key to activate the hands free function then press SHIFT and dial the number code 00 99 carat i 8 The number is dialed The memorization codes range from 00 to 99 CHAPTER 3 USING THE AUDIO CONFERENCE UNIT 15 uloo ueui u29Y MWWJ d3ju jeuijuo sjenue y The Voice INSTALLATION AND USER S MANUAL REV 2 3 7 Speaker Volume When the call is in progress press and release VOL or VOL several times to increase or to decrease the volume through the speaker The green light will blink each time you depress the volume button When the unit reaches maximum volume the green light will blink several times There are 24 volume levels for speaker volume After the conversation has ended the
9. f the unit The Audio Conferencing System includes the following items Audio Conferencing Unit ACU Audio Supply Module ASM a black 6 meter 20 ft cable with two RJ 45 modular plugs to connect the Audio Conferencing Unit to the Audio Supply Module pa black 4 meter 13 ft cable with two RJ 11 modular plugs for connection to any analog telephone network a power supply cable to connect the Audio Conferencing Unit to the power line supply user s guide 2 1 Connection and supply module for the audio conferencing system The Audio Conferencing Unit is intended for use when supplied with power from the Audio Supply Module The module includes a switch on the power supply to change the supply input voltage from 115VAC 60Hz to 230VAC 50Hz WARNING Before Use make sure to select the right power supply on VOLTAGE SELECTOR SWITCH AUDIO SUPPLY MODULE REAR PANEL POWER VOLTAGE SELECTOR SWITCH CHAPTER 3 USING THE AUDIO CONFERENCE UNIT 9 uloo ueui u29Y MWWyJ d3ju sjenuejy The Voice INSTALLATION AND USER S MANUAL REV 2 2 2 Connecting the Audio conferencing system WARNING Connect all auxiliary cables before connecting the unit to the mains 1 Plug the cable from the AUDIO SUPPLY MODULE into the Main Supply Socket under the left side of the AUDIO CONFERENCING UNIT 2 Plug the cable from the AUDIO SUPPLY MODULE into a wall jack of a standard analog teleph
10. gned to work with an analog telephone line the system features advanced Digital Signal Processing and software controlled functions It s easy to use and will ensure that you always receive high fidelity sound during your conference calls TOP Red and Green LED MUS _ Red and Green LED Red and Green LED Microphone Microphone Keypad BOTTOM Ringer Volume Switch Dip Switch Settings Extension Microphone Socket To Audio Supply Module Extension Microphone Socket CHAPTER 1 INTRODUCTION 7 d y jeuiuo sjenuejy e21uu29 uloo ueui u291 MMM The Voice INSTALLATION AND USER S MANUAL REV 2 1 1 System features Digital signal processing DSP technology Full duplex interactive operation for natural conversation Built in telephone dial pad no separate telephone required Pulse or tone dialing mode Phonebook with 100 numbers Built in loudspeaker Software controlled room noise monitors and telephone line noise monitors Automation Gain Control to minimize talking loudness variations Ringer tone switch Ordinary telephone connector One auxiliary jack for recording a conference Expandability to include two extension microphones CHAPTER 1 INTRODUCTION uloo ueui u29Y MWWyJ d3ju jeu juo sjenuejy INSTALLATION AND USER S MANUAL REV 2 The Voice 2 GETTING STARTED For correct installation follow the instructions given below This will ensure proper operation o
11. k same type used with fax machines The telephone cable included with your AUDIO CONFERENCING SYSTEM is for use with an RJ11 standard single line telephone interface CHAPTER 7 FCC REQUIREMENTS 29 d y jeuiuo sjenue y e21uu29 UlO2 UEUI U29 MMW The Voice INSTALLATION AND USER S MANUAL REV 2 30 WARNING This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to part 15 of the FCC rules These limits are designed to provide reasonable protection against harmful interference in a 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 the user is encouraged to try to correct the interference by one or more of the following measures reorient or relocate the receiving antenna increase the separation between the equipment and the receiver connect the equipment into an outlet on a circuit different from that to which the receiver is connected consult the dealer or an experienced radio TV technician for help CHAPTER 7 FCC REQUIREMENTS uloo ueui u29Y MWWJ d3j
12. l of this equipment is a label that includes among other information the FCC Registration Number and Ringer Equivalence Number REN for this equipment The REN for the ACU is 0 8 You must upon request provide this information to your telephone company The REN is useful to determine the quantity of devices you may connect to your telephone line and still have all those devices ring when your telephone number is called In most but not all areas the sum of the REN s of all devices connected to one line should not exceed five 5 0 To be certain of the number of devices you may connect to your line as determined by the REN you should contact your telephone company to determine the maximum REN for your calling area If your telephone equipment causes harm to the telephone network the telephone company may discontinue your service temporarily If possible they will notify you in advance But if advance notice isn t practical you will be notified as soon as possible You will be informed of your right to file a complaint with the FCC Your telephone company may make changes in its facilities equipment operations or procedures that could affect the proper functioning of your equipment If they do you will be notified in advance to give you an opportunity to maintain uninterrupted telephone service WARNING This device is designed for use with the Public Switched Telephone Network PSTN into an analog phone line through an RJ11 jac
13. o return to hands free mode press the MUTE or the ON key again 3 12 Flash When a call is in progress press FLASH to transfer the call from one set to another After the dial tone has been heard the caller can transfer the call by dialing the desired telephone number and hanging up the UNIT by pressing the m 3 1 3 Recorder output To record an audio conference session connect the recorder unit to the RCA jack available on the AUDIO SUPPLY MODULE 3 1 4 Switch settings The switches on the bottom of the ACU let you adjust the phone ringer volume FUNCTION RING LEVEL LOW HIGH SILENT SILENT f Y ry LOW CHAPTER 3 USING THE AUDIO CONFERENCE UNIT 17 Technical Manuals Online http www tech man com uloo ueui u29Y MWWyJ d3ju jeu juo sjenuejy INSTALLATION AND USER S MANUAL REV 2 The Voice 4 USING EXTENSION MICROPHONES The Audio Conferencing Unit External microphones have excellent unidirectional characteristics that optimize voice pickup while eliminating background noise Together with a voice activated circuit that keeps unused microphones attenuated the ACU with External Microphones solves the common problems found in large group audio conferencing applications 4 1 Connecting extension microphones Connect the microphone cables to the Audio Conferencing Unit as shown in the figure below Extension Microphone Socket Extension Microphone Socke
14. one line 3 Plug the power cable from the AUDIO SUPPLY MODULE into an AC socket 4 The AUDIO CONFERENCING UNIT will run a self test The LEDs will flash and then you will hear a tone 5 Place the AUDIO CONFERENCING UNIT on a stable surface and dial the desired telephone number 6 OPTIONAL To utilize the privacy feature plug the cable from a regular telephone unit into the Phone socket on the ASM AC SOCKET Power A TELEPHONE ANALOG TELEPHONE E A EXTENSION MICROPHONES NUD MI RECODER UNIT AUDIO CONFERENCING UNIT Optionals 10 CHAPTER 3 USING THE AUDIO CONFERENCE UNIT uloo ueui u29Y MWWJ d3ju jeu uo sjenuejy INSTALLATION AND USER S MANUAL REV 2 The Voice WARNING NEVER install telephone wiring during a lightning storm NEVER install telephone jacks in wet locations unless the jack is specifically designed for wet locations NEVER touch uninsulated telephone wires or terminals unless the telephone line has been disconnected at the network interface ALWAYS USE CAUTION when installing or connecting telephone lines ALWAYS place the AUDIO SUPPLY MODULE on the floor 2 3 How to ensure better performance For best microphone coverage place Audio Conferencing Unit in the center of the conference table Participants should be seated uniformly around the ACU to minimize level differences in the pick up of voices In noisier
15. rooms participants need to be closer to the module for clearer pickup of their voices For optimum performance use the figure below to determine talker distance to unit DISTANCE ye FROM UNIT Ss S 1 82m 6 0 pS Em lt 0 48m 1 8 Me HM ce 29 5 CHAPTER 3 USING THE AUDIO CONFERENCE UNIT 11 uloo ueui u29Y MWWyJ d3ju jeu uo sjenuejy The Voice INSTALLATION AND USER S MANUAL REV 2 NOTE Keep large sound reflecting objects such as water carafes and briefcases at least 0 3 meter 1 foot away from the ACU WARNING The system is designed to cope with the worst acoustic and line conditions and will ensure good performance even at maximum volume Minimum howling or sound distortion can be avoided by reducing the volume especially during the first 60 seconds of operation 12 CHAPTER 3 USING THE AUDIO CONFERENCE UNIT uloo ueui u29Y MWWyJ d3ju jeu uo sjenue y INSTALLATION AND USER S MANUAL REV 2 The Voice 3 USING THE AUDIO CONFERENCING UNIT Cn offhook Speaal Features Second Function 2 Fa AEA AEA Mn aN N 1 L2 La FLASH e M SOHN ANON amp 4 Ce Ce SHIFT VOL MULA NU b ZORN UA AXA a 7 mew REDIAL mure NA TONE PULSE HOLD X 1 0 Speaker Wlune Redial Feature Mo cphone Mute 3 1 Adjusting the phone ringer volume A ringer volume
16. ssssesseeeeeeeennenene nennen 19 4 2 Setting up of the external microphones for the best pickup 19 4 3 Switching on a 21 44 Muting a microphone icti eec et er a n er x 21 5 TROUBLESHOOTING AND 22 5 1 Preventive maintenariCe ie rte intrent nne 22 5 2 Troubleshooting oL m 22 6 TECHNICAL SPECIFICATIONS nnise ai nennen nennen 25 6 1 Use and storage conditions sesssssssssessee eene nnne 26 6 2 Reference regulations CE mark and reliability 26 T FCC REQUIREMENTS ice e pe eie ree reb P ds Pobre e 29 8 CTR21 APPROVAL WARNING ssesseeeeeeeneem eene 31 IV TABLE OF CONTENTS uloo ueui u29Y MWWJ d3ju jeuijJuo INSTALLATION AND USER S MANUAL REV 2 The Voice SAFETY RULES SAFETY RULES The change from cold to hot environments can cause the formation of condensate inside the device To avoid malfunctioning wait at least 1 hour before connecting the device to the supply mains Warning for power supply connection use an easily accessible outlet located near the device Never remove the mains plug for permanent connection WARNING RISK OF ELECTRIC SHOCK The power s
17. t 4 2 Setting up of the external microphones for the best pickup To ensure the best performance Set the extension microphones 1 5 2 m 5 7 ft from Audio Conferencing Unit J participants should sit 1 m 3 ft from microphone CHAPTER 5 TROUBLESHOOTING AND MAINTENANCE 19 uloo ueui u29Y MWWJ d3ju jeuijJuo The Voice INSTALLATION AND USER S MANUAL REV 2 The following examples show several positions of the external microphones for the best _O LO eC 20 CHAPTER 5 TROUBLESHOOTING AND MAINTENANCE uloo ueui u29Y MWWyJ d3ju jeu juo INSTALLATION AND USER S MANUAL REV 2 The Voice 4 3 Switching on a microphone Turn on the microphone using the ON OFF switch The led will turn green ON OFF SWITCH 4 4 Muting a microphone To mute all microphones and the Audio Conferencing System press MUTE The led will turn red To resume the communication depress the MUTE button and the LED will turn green To shut off a single extension microphone switch to OFF the ON OFF switch The LED MUTE will turn red Switch to the ON position and the microphone is activated again CHAPTER 5 TROUBLESHOOTING AND MAINTENANCE 21 uloo ueui u29Y MWWyJ d3ju jeu uo The Voice INSTALLATION AND USER S MANUAL REV 2 5 TROUBLESHOOTING AND MAINTENANCE
18. u jeu uo INSTALLATION AND USER S MANUAL REV 2 The Voice 8 CTR21 APPROVAL WARNING This equipment has been approved in accordance with Council Decision 98 482 EC for pan European single terminal connection to the public switched telephone network PSTN However due to differences between the individual PSTNs provided in different countries the approval does not of itself give an unconditional assurance of successful operation on every PSTN network termination point In the event of problems you should contact your equipment supplier in the first instance NETWORK COMPATIBILITY DECLARATION This equipment has been designed and tested to interwork with all the public switched telephone networks of the European Union CHAPTER 8 CTR21 APPROVAL WARNING 31
19. uloo ueui u291 MWWJ d3ju jeuiuo Audioconferencing System The Voice INSTALLATION AND USER MANUAL uloo ueui u291 MWWJ d3ju jeuiuo Audioconferencing System The Voice INSTALLATION AND USER S MANUAL The information contained in this manual is property of Aethra Telecomunicazioni s r l it is subject to change without notice and does not involve any responsibility by Aethra Telecomunicazioni s r l Copyright Aethra Telecomunicazioni Srl 1999 All rights reserved Rev 2 October 2000 Cod 074000116 This manual is composed of 33 pages Technical Manuals Online http www tech man com Technical Manuals Online http www tech man com uloo ueui u29Y MWWyJ d3ju sjenuejy INSTALLATION AND USER S MANUAL REV 2 The Voice Table of Contents 1 2 1 2 2 2 3 3 1 3 2 3 3 3 4 3 5 3 5 1 3 5 2 3 5 3 3 5 4 3 6 3 7 3 8 3 9 INTRODUGCTION ceti te t A bL b e hes 7 System featU res nce e bt eee b hv ei ug e bee i erbe eed 8 GETTING STARTED ss enr de dm t hero 9 Connection and supply module for the audio conferencing system 9 Connecting the Audio conferencing 5 5 10 How to ensure better 11
20. upply used by this device involves lethal voltage levels Do not access internal parts of the device and or of the power supply unit If objects or liquids penetrate inside the device immediately disconnect the power supply cable Before using the device again have it checked by specialized staff Refer to qualified staff for service In case of intervention always check that the power supply has been completely and successfully disconnected In case of fire absolutely avoid using water to extinguish it dyqy sjenuewp UlO2 UEUI U29 MMM The Voice C INSTALLATION AND USER S MANUAL REV 2 WARNINGS CAUTION Many of the components used in this device are sensitive to electrostatic charge In case of manipulation of the connection cables disconnect the power supply and avoid direct contacts with the connector terminals Failure to comply with these warnings could cause permanent damage to device CLEANING To clean the device use a soft cloth either dry or soaked with little detergent Never use any type of solvents such as alcohol or gasoline to avoid damaging the finish SAFETY RULES d y jeuiuo sjenuejy e21uu29 uloo ueui u29j MMWWJJ INSTALLATION AND USER S MANUAL REV 2 The Voice 1 INTRODUCTION The Audio Conferencing System is capable of providing actual full duplex communication without the noise echo and feedback common in most speakerphones Desi
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