ClearOne SONAR GT1524 User's Manual
Contents
1. i A C D E F Figure 1 3 GT1524 Rear panel connectors A Power This power module accommodates power ranging from 100 240VAC 50 60Hz 30W No switching is required B Line Out Aux Out These connection blocks are for line level outputs The Line Output is used for connection to an external power amplifier or sound reinforcement system The Aux Out is used for connection to recording equipment such as a VCR The nominal output level is OdBu C 4 Wire Video Codec In Out Connects four wire transmission systems such as a video codec D Mic Line In Aux In The Mic Line input is for connection of a local microphone or input from a local sound system or mixer The Aux In allows input from other audio sources such as a VCR or CD player Nominal input is OdBu Technical Services Group 1 800 283 5936 USA 1 801 974 3760 Introduction Operational Requirements E RS 232 This female DB 9 serial port is for interconnection between the GT1524 and a PC or custom remote control See Appendix C for serial port commands F Control Status This female DB 25 connector is used to interface parallel control and status to the GT1524 Control pins on this connector are used to perform functions via a momentary closure to ground Each status pin on this connector shows the state of the function handled by the pin Status pins are open collector outputs When active the output is pulled to2. Serial Commands TAMODE This command controls or reports the Telephone Adapt Mode control of the unit Command form TAMODE lt X gt Explanation Value 0 Sets Telephone Adapt Mode to Auto 1 Sets Telephone Adapt Mode to Burst Null Reports back the current state Return value The command returns the updated connection state of the unit in the same format as the command TE This command controls or reports the connection status of the unit Command form TE lt X gt Explanation Values O Sets the unit to disconnect from the line 1 Sets the unit to connect to the line 2 Toggles the states Null Reports back the current state Return value If the current state is On the following is returned TE 1 If the current state is Off the following is returned out the serial port TE 0 TERL This command reports back the telephone echo return loss TERL for the GT1524 in decibels Command form TERL Example If the current TERL level is 10dB the following is returned out the serial port TERL 10 TERLE This command reports back the telephone echo return loss enhancement TERLE for the GT1524 in decibels Command form TERLE Example If the current TERLE level for the telephone canceller is 20dB the following is returned out the serial port TERLE 20 Technical Services Group 1 800 283 5936 USA 1 801 974 3760 Appendix C Serial Commands TOUT This command sets or reports the cu
3. Installation amp Operation Manual ClearOne You re Virtually There Installation amp Operation Manual ClearOne You re Virtually There O 2002 ClearOne Communications Inc All rights reserved No part of this document may be reproduced in any form or by any means without written permission from ClearOne Communications Inc Printed in the United States of America ClearOne Communications reserves specific privileges Information in this document is subject to change without notice GT1524 Installation and Operation Manual ClearOne Part No 800 114 101 June 2002 Rev 2 0 Technical Services Group 1 800 283 5936 USA 1 801 974 3760 GT1524 Installation and Operation Manual CHAPTER T Introduction ciar ha 1 Features A a eed es 1 Professional Services Group o oooooooooooo eee eens 2 Technical SUpport ra aa 2 Sales and Customer Service 2 ClearOne Communications EUMEA GmbH 2 Product registration 6 05624 bo oe hee eae E ees 2 Product returns ii turi Areale eee we 2 Unpacking asian rate dada ds 3 Controls and Connections LL 3 Front Panel rateali si 3 Rear panel cis renale wehbe 2684 eda lia dd e 4 Operational Requirements 0 0 eee eee eee 5 Equipment placement 5 Telephone line requirements 5 CHAPTER 2 Installation il een 7 Hardware Setup 22sec teehee ee ta eae i 7 Connecting the unit sesso ce oa ee ee bee eet 7 LCD Programming dass e One A 8 MEN
4. ClearOne You re Virtually There Introduction Professional Services Group Tf you need any additional information on how to install set up or operate your system please contact us at one of the locations listed below We welcome and encourage your comments so we can continue to improve our products and serve your needs ClearOne Communications 1825 Research Way Salt Lake City UT 84119 Technical Support Telephone 1 800 283 5936 USA or 1 801 974 3760 Fax 1 801 977 0087 E mail tech support clearone com Web site www clearone com Sales and Customer Service Telephone 1 800 945 7730 USA or 1 801 975 7200 Fax 1 800 933 5107 USA or 1 801 977 0087 E mail sales clearone com ClearOne Communications EuMEA GmbH Leonhardstr 16 18 D 90443 Nuremberg Germany Telephone 49 911 955159 0 Fax 49 911 955159 10 E mail global clearone com Product registration Please register your GT1524 online at www clearone com When your product is properly registered ClearOne Communications is better able to serve you should you require technical assistance Registration information is also used to notify you of upgrades and new product information Product returns All product returns require a return authorization RA number Please contact ClearOne Technical Support before attempting to return your GT1524 unit Technical Services Group 1 800 283 5936 USA 1 801 974 3760 Introduc
5. in rural areas European compliance for international unit part no 910 114 102 only 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 ClearOne Communications Inc of 1825 Research Way Salt Lake City Utah 84119 U S A declares that this equipment is designed to be compatible with the following networks Austria Belgium Denmark Finland France Germany Greece Iceland Ireland Italy Liechtenstein Luxembourg The Netherlands Norway Portugal Spain Sweden Switzerland and United Kingdom The international unit part no 910 114 102 complies with the requirements of the European guidelines 89 336 EEC Electromagnetic Compatibility 73 23 EEC Electrical operating material for use within specific voltage limits 98 482 EC Single terminal connection to the public switched telephone network Conformity of the equipment with the above guidelines is attested by the CE mark Technical Services Group 1 800 283 5936 USA 1 801 974 3760 Index A R
6. level Value 3 R Indicates relative A Indicates absolute Null will default to R relative Return values The command will return the updated level of the channel in the same format as the command The level returned is always absolute Technical Services Group 1 800 283 5936 USA 1 801 974 3760 Appendix C Serial Commands Example The following command lowers the gain 3dB on the Mic Line input channel GAIN 11 3 HOOK This command sends a momentary interruption in the line seizure hook flash to the telephone line Command form HOOK Return values If hook flash succeeded the following is returned out the port HOOK 0 HOOKD This command controls and reports the Hook Duration of the unit Command form HOOKD lt x gt Explanation Values 1 Sets Hook Duration to 50 ms 2 Sets Hook Duration to 500 ms Null Reports back the current state Return values The command will return the current hook duration of the unit in the same format as the command If the sent command changes the hook duration of the unit the updated hook duration is returned LFP This command locks unlocks or returns the current state of the front panel from the serial port Command form LFP lt X gt Explanation Values 0 Unlocks the front panel 1 Locks the front panel 2 Toggles between states regardless of current state Null Returns the current state of the front panel Return values The command will retu
7. or 38 400 baud 8 bits 1 stop bit no parity Conventions The following typographic conventions are used in this document to describe the different serial commands Use the Command structure section and the examples as a guide when creating your serial commands Convention Description lt X gt Parameters enclosed in lt gt indicate a mandatory parameter X Parameters enclosed in indicate an optional parameter 1 8 Parameters separated by a indicate a range between the values 4 7 9 Parameters separated by a indicate a list of available values MREF Words in uppercase bold indicate command text Command structure Commands can be either UPPERCASE or lowercase Also extra spaces or tabs between arguments in text commands are allowed Return values are always in uppercase In order for a command to be recognized by the serial port the command must be terminated by a carriage return The structure of serial commands is as follows COMMAND X X COMMAND is the command text X X represents any additional options in the order that they appear in the command descriptions that follow Error codes Error 1 Future Error 2 Could not extract a command from the string received Error 3 Serial overrun Error 4 Reserved Error 5 Invalid parameter Error 6 Unrecognized command Technical Services Group 1 800 283 5936 USA 1 801 974 3760 Appendix C Serial Commands GT1524 Serial Commands Comma
8. tones e Adjust volume on received audio e Re null the telephone hybrid Meter input and output e Read TERL and TERLE e Control any function on the unit Technical Services Group 1 800 283 5936 USA 1 801 974 3760 ClearOne Communications AN recommends use of a custom remote controller for user interface Refer to the manufacturer s documentation for your particular custom remote controller Technical Services Group 1 800 283 5936 USA 1 801 974 3760 Appendix A Dimensions LxDxH 17 25 x 10 25 x 1 75 43 8 x 26 x 4 5 cm Weight 7 lb 3 18 kg dry 12 b 5 4 kg shipping Operating Temperature 32 to 100 F O to 38 C Humidity 15 to 80 non condensing Power Input Range Auto adjusting 100 240VAC 50 60Hz Power Consumption 30W typical RS 232 DB 9 female 9 600 default 19 200 38 400 baud rate 8 bits 1 stop no parity Hardware flow control on default off Control Status DB 25 female Inputs active low pull to ground Outputs open collector 40VDC max 40mA each 5V pins 2 300mA each Mic Line Input Push on terminal block balanced bridging Impedance 5kQ Nominal Level adjustable 55dBu OdBu Maximum Level 33dBu 20dBu Echo Cancellation 120ms tail time works with 12dB of room gain Phantom Power 24V selectable AUX In Push on terminal block balanced bridging Impedance 20kQ Nominal Level 0dBu Maximum Level 19dBu 4 W
9. 0 Appendix C Serial Commands MUTE This command changes or reports the state of mute for a given channel Command form MUTE lt CH gt lt X1 gt lt X2 gt Explanation Channel Mic Line Input Line Output Aux Input Aux Output 4 Wire Input 4 Wire Output Telco Input Telco Output Value 1 Specifies input Specifies output Value 2 Sets mute to Off Sets mute to On mute the selected channel Toggles between states regardless of current state ull Reports current mute state for the selected channel Return values The command will return the mute status On 1 Off 0 in the same format as the command NLP This command changes or reports back the state of the nonlinear processing for the echo canceller Command form NLP lt X gt Explanation Value O Sets the state to Off 1 Sets the state to soft 2 Sets the state to medium 3 Sets the state to aggressive Null Returns the current state Return values The command will return the updated condition O Off 1 Soft 2 Medium 3 Aggressive of the nonlinear processing in the same format as the command NULL This command sends a short noise burst down the telephone line and adapts the GT1524 to the telephone line Command form NULL Return values NULL is returned out the serial port when the command has been executed Technical Services Group 1 800 283 5936 USA 1 801 974 3760 Appendix C Serial Commands PP This c
10. 4 Wire In 4 8 19 4 Wire Out 4 8 12 19 A acoustic echo cancellation AGC 11 12 answering a call 16 AP IR Remote 8 auto answer 13 16 auto disconnect 13 16 Aux In 4 11 19 Aux Out 4 8 12 19 Aux Out Mix 12 B baud 13 C call progress 13 control status 5 7 19 20 D DB 25 5 20 default meter 14 digital signal processors 1 disconnecting a call 16 E echo cancellation 19 echo canceller 11 ERL 4 14 ERLE 4 14 F flow control 13 frequency response 19 from telco 11 front panel LEDs 8 G gain adjust 11 12 15 H high pass filter 11 I inputs 14 installation 7 L LCD display 3 8 LCD panel 14 LCD programming 8 Line Out 4 8 19 Lock panel 12 13 loop drop 13 loop drop CP 13 M making a call 16 Meters 4 14 Mic Line In 4 8 11 19 mute 11 12 15 NLP adjust 11 noise 19 noise burst 4 0 outputs 12 14 P passcode 12 phantom power 11 pinouts 20 power 4 8 product registration 2 product returns 2 R ring indication 14 16 RS 232 5 8 12 13 19 Technical Services Group 1 800 283 5936 USA 1 801 974 3760 S serial commands 21 set passcode 12 13 speaker 5 8 Speaker Line Out 12 19 system 12 13 T technical support 2 telco 12 13 19 telco echo cancellation 1 Telco Line 5 19 Telco Set 5 19 telephone handset 16 TERL 4 14 TERLE 4 14 timeout 14 To Telco 12 touch tone dialing 1 two wire four wire operat
11. 800 283 5936 USA 1 801 974 3760 Appendix D Warranty ClearOne Communications Inc Manufacturer warrants that this product is free of defects in both materials and workmanship Should any part of this product be defective the Manufacturer agrees at its option to A Repair or replace any defective part free of charge except transportation charges for a period of one year from the date of installation for the end user provided the owner returns the product to the Manufacturer at the address set forth below No charge will be made for parts or labor during this period B Furnish replacement for any defective parts in the product for a period of one year from the date of original purchase Replacement parts shall be furnished without charge except labor and transportation This Warranty excludes assembled products not manufactured by the Manufacturer whether or not they are incorporated in a Manufacturer product or sold under a Manufacturer part or model number THIS WARRANTY IS VOID IF A The product has been damaged by negligence accident act of God or mishandling or has not been operated in accordance with the procedures described in the operating and technical instructions or B The product has been altered or repaired by other than the Manufacturer or an authorized service representative of the Manufacturer or C Adaptations or accessories other than those manufactured or provided by the Man
12. A W arrows Default Meter The default meter parameter determines what is being displayed on the LED meter when the GT1524 times out Timeout The GT1524 has a system mode called Timeout This parameter can be adjusted through the RS 232 port only using the TOUT command Timeout controls the delay time in minutes before the LCD panel will automatically switch back to the title screen and default meter The range is 0 15 minutes Default is 10 minutes 0 disables this mode Technical Services Group 1 800 283 5936 USA 1 801 974 3760 A correctly installed GT1524 virtually runs by itself Typical operations involve changing volume of an output muting an input or output or handling calls on the connected telephone handset For most installations a custom remote control optional is also used Controlling volume When participating in a conference you might find it necessary to increase or decrease the volume of a particular output For instance when the audio at a distant location is too soft adjust the output to the speakers so that the level is comfortable To adjust the volume 1 Determine which output needs to be adjusted 2 Scroll to the Outputs menu select the appropriate output and scroll to Gain Adjust Press Enter 3 Adjust the gain level using the A V buttons You should be able to hear the volume level adjust while increasing or decreasing the gain 4 Press Enter when you reach the desi
13. Answer 0n Off This parameter sets the telephone interface to automatically answer an incoming call Auto Answer On or allow the call to be handled manually Auto Answer Off Auto Disconnect The interface can also be set to disconnect upon Loop Drop Call Progress Loop Drop CP or to disconnect manually Auto Disconnect Off Technical Services Group 1 800 283 5936 USA 1 801 974 3760 Disabling the timeout will A A allow the GT1524 to remain in the same position in the LCD menu until the LCD menu is manipulated again Installation LCD Programming Ring Indication An audible ring indicator sent to the PA output can be enabled or disabled under this menu Unit ID Number The Unit ID allows you to view the read only unit address set at the factory This unique ID number identifies that particular unit and cannot be changed Meters There are five main submenus under the meter menu tree Inputs Outputs ERL TERL ERLE TERLE and Default Meter The first four submenus are all handled in the same way Inputs Outputs ERL TERL and ERLE TERLE Referencing the LCD press the Meter button then scroll through the options Inputs Outputs ERL TERL and ERLE TERLE to specify which is to be metered by the front panel LED meter When the appropriate option is visible press Enter to begin monitoring ts status on the front panel LCD All items under this menu can be scrolled through by pressing the
14. Applied to a specific channel Technical Services Group 1 800 283 5936 USA 1 801 974 3760 Appendix C Serial Commands AA This command activates and deactivates the auto answer feature Command form AA lt X gt Explanation Value 0 Disables auto answer 1 Enables auto answer 2 Toggles between states regardless of current state Null Reports back the current state Return values The command will return the updated condition On 1 Off 0 of the auto answer in the same format as the command AD This command changes the state of the auto disconnect function Command form AD lt X gt Explanation Value 0 Sets Auto Disconnect to Off 1 Sets Auto Disconnect to Loop 2 Sets Auto Disconnect to Call Progress CP 3 Sets Auto Disconnect to Loop CP Null Reports back the current state Return values The command will return the updated connection state of the unit in the same format as the command If the sent command changes the state of the unit the updated state is returned If Command Returns current disconnect state is Off ADO current disconnect state is Loop AD 1 current disconnect state is CP AD 2 current disconnect state is Loop CP AD 3 AGC This command changes or reports back the state of the AGC for a microphone or line input Command form AGC lt CH gt lt X gt Explanation Channel 1 Mic Line Input 2 Aux Input 3 4 Wire Input 4 Telco Input Value O Sets the stat
15. B Outputs There are four main submenu under the Outputs menu tree Speaker Line Out Aux Out 4 Wire Out and To Telco Each of these submenus contain the same menus at the next menu depth Gain Adjust and Mute Aux Out also features an Aux Out Mix parameter described below Each parameter is applied to the respective outputs Speaker Line Out 4 Wire Out and To Telco Gain Adjust This adjusts each output s gain ranging between 20dB and 20dB in conjunction with the LCD readout and the LED bar meter Default is OdB Mute This parameter mutes a particular output channel Default is Off Aux Out Gain Adjust This adjusts each output s gain ranging between 20dB and 20dB in conjunction with the LCD readout and the LED bar meter Default is OdB Mute This parameter mutes a particular output channel Default is OFF Aux Out Mix This parameter selects Mic Line In and or Aux In to Aux Out System The System menu allows you to view five parameters Lock Panel Set Passcode RS 232 Telco and Unit ID The first four may also be adjusted Lock Panel The GT1524 can be secured from unauthorized adjustments by locking the front panel and establishing a user passcode Menu items can still be viewed when the panel is locked but settings cannot be altered or entered until the panel is unlocked by entering the appropriate passcode Technical Services Group 1 800 283 5936 USA 1 801 974 3760 Installation LC
16. D Programming To lock the front panel 1 Enter the System menu 2 Scroll through the menu items to select Lock Panel and press Enter 3 Select On and press Enter again To unlock the front panel 1 Attempt to adjust a parameter The GT1524 prompts you for the passcode 2 Begin entering the passcode Once you have correctly entered the fifth character the front panel unlocks The default passcode for all units is Up Up Down Down Enter Set Passcode Once you have unlocked the GT1524 you can change the passcode Before the GT1524 allows passcode changes the new passcode must be entered then re entered to validate it The passcode must be five front panel buttons in any combination or multiple RS 232 Two RS 232 parameters can be adjusted through the front panel LCD baud rate and flow control If data is lost during serial access through the RS 232 port a serial overrun error will occur This is indicated on the LCD display This parameter sets the GT1524 s RS 232 port communication rate at 9 600 default 19 200 or 38 400 baud bps Baud To set the baud rate scroll through the settings to select the desired baud rate then press Enter Flow Control The flow control parameter allows activation and deactivation of hardware flow control The two options are On and Off default To activate the flow control scroll to On and press Enter To deactivate it scroll to Off and press Enter Telco Auto
17. ERLE 4 Wire Telco Default Meter ERL csi TERL ERLE TERLE Spkr Line Out From Telco 4 Wire In Aux In Mic Line In To Telco 4 Wire Out Aux Out Figure 2 7 LCD Menu Tree and Defaults Technical Services Group 1 800 283 5936 USA 1 801 974 3760 Installation LCD Programming Inputs There are four main submenus under the Inputs menu tree Mic Line In Aux In 4 Wire In and From Telco see Figure 2 7 Mic Line In Gain Adjust This adjusts the Mic Line In submenus including the level for the Input gain ranging between 20dB and 20dB The default setting is 0dB Mic Line Input This input defaults as a line level input 0dB gain but can be switched to a mic level input 55dB or 25dB gain Mute This parameter mutes the input channel Phantom Power Defaults with 24V phantom power disabled but may be switched on to accommodate input devices requiring phantom power AGC The input can use automatic gain control AGC This feature keeps softer and louder talkers at a consistent transmit level This feature is disabled when shipped from the factory The target gain is 0dB and adjusts at 2dB per second The AGC start adjustment is 20dB but will adjust only 6dB Adjustments will not be made at 5dB on either side of the target 0dB High Pass Filter A high pass filter may be selected on the Mic Line input to reduce unwanted noise The filter has a break frequency at 250Hz and 3dB d
18. ESC In general while adjusting parameters numerical values do not wrap around when the end is reached However parameters that toggle between two values or are a list of values will wrap around When adjusting a parameter press and hold the Up or Down button for more than two seconds to scroll through the values at a faster rate GT1524 Parameters Worksheet System Wide Parameters Program Parameter Selection Range Lock Panel On Off Set Passcode Any 5 Front Panel Keys Enter RS232 Baud Rate 9 6 19 2 38 4 kbps RS232 Flow Control On Off Telco Auto Answer On Off Telco Auto Disconnect Off Loop Drop Call Prog LD CP Telco Ring Indication Off 1 2 3 4 Unit ID No Factory Programmed Timeout 0 15 10 Telco Adapt Mode Auto Burst Hook Duration 50 ms 500 ms Receive Reduction On Off Meter Selection Range Program Parameter Any Input Output Spkr Line Out Default Meter 12 8 YS 4 y oS 4 i 10 S 30 S Figure 2 5 Front Panel Buttons Pressing ESC at the top of A the tree has no effect Input Channel Mic Line In Aux In 4 Wire In From Telco Program Parameter Selection Range Gain Adjust 20dB to 20dB 0 Mic Line Input Mic 55dB Mic 25 dB Line Mute On Off Phantom Power On Off AGC On Off High Pass Filter On
19. Off Echo Cancellation On Off NLP Adjust Off Soft Medium Aggressive Output Channel Spkr Line Out Aux Out 4 Wire Out To Telco Program Parameter Selection Range Gain Adjust 20dB to 20dB 0 Mute On Off Aux Out Mix Mic Line In On Off Aux Out Mix Aux In On Off Set up only by serial port Figure 2 6 Parameters Worksheet Technical Services Group 1 800 283 5936 USA 1 801 974 3760 Power Up Screen Installation LCD Programming ClearOne GT 1524 Version x x Gain Adjust Mic Line Input Mute Phantom Power m Mic Line In AGC High Pass Filter __ _AuxIn Echo Canceller Inputs 4WireIn NLP From Telco Gain Adjust Mute AGC Spkr M Line Out Gain Adjust Aux Out Mute Gain Adjust Outputs r Mic Line In p Aux Out Mix Auxin Mute 4 Wire Out To Telco Lock Panel Set Passcode s Baud Rate YLEN RS232 Flow Control Telco Auto Answer 7 UnitiD Auto Disconnect Ring Indication Mic Line Input From Aux 4 Wire Output To Telco Meters E ERL TERL Spkr Line Aux _ ERLE T
20. US A A wad Deol a Aaa 8 Input parameters occur e a Dee et ee Ele eee eet 11 CHAPTER 3 Operation sarasmi Aree bee odd ola ds Bye Bae 15 Front Panel Control oraaa i a ai ie ee AAA AA Ea ate 15 Controlling vOlUM eones RIMA Saw eG ea de ede Ale 15 MULING ias ees Dea een nes Pence be Ye a ate A 15 Answering a call 2s 22 S7 etase edit a ee e 16 Making a call O a a ee 16 Disconnectingza call e el ead habe A lai 16 C stomi Control asa ee eee ee eet ee eee ala o es Cee de do 17 Custom controller options LL 17 Technical Services Group 1 800 283 5936 USA 1 801 974 3760 APPENDICES ui ia a Rai 19 Appendix A Specifications 19 Appendix Bi PinoUts occ oes nee iaia 20 Appendix C Serial Commands o e eee eee es 21 Appendix D Warranty i 33 Appendix E Compliance 0 0 34 IRR A E we Aah A 37 Technical Services Group 1 800 283 5936 USA 1 801 974 3760 The GT1524 provides the highest possible audio quality available in a single channel echo canceller It features an integrated telephone interface that enables telephone participants of an audio or video conference to sound as if they are actually in the same room Plus it features simultaneous two wire four wire operation so you can audio conference and video conference at the same time And there s no white noise setup the GT1524 adapts automatically The GT1524 performs a variety of complex integrated audio functions using di
21. cturer will give instructions respecting the shipment of the product or such other matters as it elects to honor this warranty as above provided This warranty does not cover damage to the product during shipping and the Manufacturer assumes no responsibility for such damage All shipping costs shall be paid by the customer This warranty extends only to the original end user and is not assignable or transferable This Warranty is governed by the laws of the State of Utah without regard to the conflicts of interests provisions thereof ClearOne Communications 1825 Research Way Salt Lake City Utah 84119 FCC Part 15 compliance 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 FCC Part 68 compliance A label containing among other information the FCC registration number and Ringer Equivalence Number REN for this equipment is prominently posted on the equipment If requested this information must be provided to your telephone company Technical Services Group 1 800 283 5936 USA 1 801 974 3760 Appendix E Compliance USOC Jacks This device uses RJ11C and RJ21X terminal jacks The REN is used to determine the quantity of devices which may be connected to the telephone line Exces
22. e front panel or on the remote control This will route the call through the GT1524 e Pick up the telephone handset and talk to your party over the telephone Press the front panel On button to connect the call to the GT1524 e Use external control such as an AMX or Crestron touch panel or custom control device See page 21 for information on using serial commands Making a call Call the party using your handset After the other party has answered route the call through the GT1524 by pressing the On button The On LED lights and the GT1524 takes control of the call disabling the telephone set You can now safely hang up the handset without disconnecting the call or access the DTMF dialer in the GT1524 via a remote control system Disconnecting a call If the call is routed through the GT1524 the On LED glows green press the Off button on the front panel or send a command through the RS 232 port TE 0 The Off LED glows red and the On LED turns off Technical Services Group 1 800 283 5936 USA 1 801 974 3760 Operation Custom Control Custom controller options The GT1524 is designed to function with remote control systems The controller is connected to the GT1524 through the RS 232 port The AP IR Remote also functions with the GT1524 You can perform all actions through the custom controller e Turn the GT1524 telephone connection on or off Mute transmitted and received audio e Generate DTMF
23. e to Off 1 Sets the state to On 2 Toggles between states regardless of current state Null Returns the current state Return values The command will return the updated condition On 1 Off 0 of the AGC in the same format as the command Technical Services Group 1 800 283 5936 USA 1 801 974 3760 Appendix C Serial Commands AUXMIX This command changes or reports back the state of the Aux Mix Out Command form AUXMIX lt CH gt lt X gt Explanation Channel 1 Mic Line In 2 Aux In Value 0 Sets state to Off 1 Sets the state to On Return values The command will return the updated condition of the Aux Mix in the same format as the command BAUD This command selects or returns the baud rate for the RS 232 port on the GT1524 Command form BAUD lt X gt Explanation Value Selects 9 600 baud bps rate Selects 19 200 baud bps rate Selects 38 400 baud bps rate ull Returns the baud bps rate Return values The command will return the updated condition 1 9 600 baud 2 19 200 baud 3 38 400 baud of the RS 232 baud rate in the same format as the command DFLTM This command changes and reports back the status of the default meter Command form DFLTM lt CH gt lt X gt Explanation Channel 1 Mic Line Input Line Ooutput 2 Aux Input Aux Output 3 4 Wire Input 4 Wire Output 4 Telco Input Telco Output Value I Specifies an input channel O Specifies an o
24. gital signal processors DSPs Adjustments in level and other functions can be made via front panel programming activation through a closure on the rear panel or an RS 232 serial interface The integrated telephone interface provides the GT1524 s audio conferencing capability and can be customized to suit your needs It can be set to automatically answer upon detection of a valid ring and automatically disconnect on loop drop or call progress tones The GT1524 includes a built in five watt power amp The amp delivers 5W of output power into a 40 speaker eliminating the need to provide external amps for the speakers e Easy design programming installation and maintenance e Each input incorporates automatic gain control to compensate for loud or soft talkers while the mic line input offers high pass filtering to reduce unwanted low frequency noise e Integrated touch tone dialing for easy dialing through remote control e ClearOne s digital signal processing technology ensures crystal clear audio with the deepest most reliable hybrid null e 8kHz sampling rate allows continual adaptation to telephone line conditions e Acoustic echo cancellation single channel gt 120 ms DSP bases e Full time telco echo cancellation with 31 millisecond tail time e Lockout front panel access for security e Phoenix push on blocks make pin for pin wiring easier Technical Services Group 1 800 283 5936 USA 1 801 974 3760
25. ground otherwise the output is an open circuit See Appendix B for control status port pinout information G Speaker One 5W 4 16 speaker can be directly connected to the GT1524 eliminating the need for a power amplifier H Telco Line Connects to your telephone line source I Telco Set Connects to your telephone handset Equipment placement The GT1524 is designed for mounting in a 19 inch equipment rack Do not block any of the ventilation holes With a desktop kit the GT1524 can be modified for tabletop placement Telephone line requirements The GT1524 operates on a standard analog telephone line and connects to the telephone system with a standard RJ 11C modular jack If you do not have an RJ 11C jack where you want to install the GT1524 call your telephone company for installation Technical Services Group 1 800 283 5936 USA 1 801 974 3760 Technical Services Group 1 800 283 5936 USA 1 801 974 3760 This chapter provides step by step instructions for installing your GT1524 system Figure 2 1 below shows the back panel connections of a fully installed GT1524 5W 80 1 VCR A Telephone system 4 WIRE VIDEO CODEC el E ES Logic out status and control I Power Amp e o o oo Microphone lL Video codec AP IR Remote Control Figure 2 1 GT1524 ins
26. ies certified equipment This certification means that the equipment meets certain telecommunications network protective operational and safety requirements The Department does not guarantee the equipment will operate to the user s satisfaction Before installing this equipment users should ensure that it is permissible to be connected to the facilities of the local telecommunications company The equipment must also be installed using an acceptable method of connection In some cases the company s inside wiring associated with a single line individual service may be extended by means of a certified connector assembly telephone extension cord The customer should be aware that compliance with the above conditions may not prevent degradation of service in some situations Repairs to certified equipment should be made by an authorized Canadian maintenance facility designated by ClearOne Communications Any repairs or alterations made by the user to this equipment or equipment malfunctions may Technical Services Group 1 800 283 5936 USA 1 801 974 3760 Appendix E Compliance give the telecommunications company cause to request the user to disconnect the equipment Users should ensure for their own protection that the electrical ground connections of the power utility telephone lines and internal metallic water pipe system if present are connected together This precaution may be particularly important
27. ion U Unit ID 12 14 unmute 15 V video codec 8 Video Codec In 4 8 19 Video Codec Out 4 8 19 volume control 15 Index S Z 1 Technical Services Group 1 800 283 5936 USA 1 801 974 3760 ClearOne Communications 1825 Research Way Salt Lake City UT 84119 tel 1 800 945 7730 fax 1 800 933 5107
28. ire Video Codec In Push on terminal block balanced bridging Impedance 20kQ Nominal Level 0dBu Maximum Level 19dBu Line Output Push on terminal block balanced bridging Impedance 500 Nominal Level 0dBu Maximum Level 19dBu AUX Output Push on terminal block balanced bridging Impedance 500 Nominal Level 0dBu Maximum Level 19dBu 4 Wire Video Codec Out Push on terminal block balanced bridging Impedance 500 Nominal Level 0dBm Maximum Level 19dBu Speaker Output Binding post 5W max into 4Q Technical Services Group 1 800 283 5936 USA 1 801 974 3760 Telco Line RJ 11 connector POTS plain old telephone service line or analog extension from PBX Telco Set RJ 11 connector Connect analog telephone set A lead supervision provided Audio Performance Conditions Unless otherwise specified all measure ments are performed with a 22Hz to 22kHz BW limit no weighting Frequency Response 20Hz to 15kHz 2dB Noise EIN 125dBu 15kHz BW max gain Rs 150Q THD N lt 0 1 SNR 65dB re OdBu Dynamic Range 85dB Telco Audio Performance Frequency Response 250Hz to 3 3kHz 2dB AGC disabled SNR gt 60dB re 15dBm on off the telephone line THD N lt 0 2 250Hz to 3 3kHz AGC disabled Pre emphasis 4dB 2kHz TEC tail time 31ms TEC null 55dB nominal Approvals FCC ASA CE ClearOne You re Virtually There Appendix B Pinouts Control Sta
29. nd AA AD AGC AUXMIX BAUD Selects Reports Auto Answer for Telco Port Selects Reports Auto Disconnnect for Telco Port Enables Disables AGCt Enables Disables Mic Line In and Aux In to Aux Out Sets Reports RS 232 Port Baud Rate DFLTM Sets Reports Default Meter DIAL Sends Dial String to Telco Port EC Enables Disables Echo Canceller ERL Returns ERL for the Mic Line In Channel ERLE Returns ERLE for the Mic Line In Channel FLOW Enables Disables Flow Control FPP Sets Reports Front Panel Passcode GAIN Sets Reports Gain Settingt HOOK HOOKD Selects Reports Hook Duration Time LFP Enables Disables Front Panel Lock LVL Reports Levelt MHP s Reports High Pass Filter Status MLINE s Reports Mic Gain MUTE s Reports Mutet s Reports Non Linear Mic Processing nds Noise Burst Adapting Unit to Phone Line PP RING RINGEN RXRD TAMODE TE TERL TERLE s Reports Phantom Power for Mic Line In Reports Presence of a Ring on Telco Port Selects Reports Ring Indication Sets Reports Receive Reduction to Telco Port Sets Reports Telco Adapt Mode Sets Reports Telco Off Hook Status Returns Echo Return Loss for Telco Channel Returns Echo Return Loss Enhancement for Telco Channel NINININ IW IW C Tl D D D D D D D S z 3 E Oo o 3 o 3 a je n a O o 3 3 fe a TOUT Sets Reports Inactivity Timeout UID Returns ID Number of Unit VER Returns Current Version of Software t
30. nu system Technical Services Group 1 800 283 5936 USA 1 801 974 3760 jji Introduction Controls and Connections C LED Meter The LED bar meter displays the audio level of any input or output of the GT1524 as well as the Echo Return Loss ERL and Echo Return Loss Enhancement ERLE between the Speaker Line Out and the Mic Line audio input channel The LED meter also displays Telco Echo Return Loss TERL and Telco Echo Return Loss Enhancement TERLE for the telephone hybrid D Meter This button displays the Meter branch of the GT1524 s LCD menu tree from which you can view or enter settings E On The On button connects and adapts the GT1524 to the telephone line Pressing and holding the On button for more than two seconds while the GT1524 is active sends a noise burst to readapt the unit to the phone line A short tone 1000Hz is sent out the Speaker and Line outputs to indicate that the GT1524 is connected to the line F Off The Off switch disconnects the GT1524 from the telephone line and mutes all transmit audio to and from the telephone line A short tone 400Hz is sent out the Speaker and Line Outputs to notify the user that the GT1524 is disconnected from the line Rear panel H TELCO LINE Al TELCO SET 1 Tne our auxour iN our IMICAIME INE AUXIN RS 232 CONTROLISTATUS AE ACA VOLTAGE RANGE 100V 240V 2A FREQUENCY S0Hz 60H2 4 WIREIVIDEO CODEC
31. ommand changes or reports back the state of the phantom power for a microphone Command form PP lt X gt Explanation Value O Sets the state to Off 1 Sets the state to On Null Returns the current state Return values The command will return the updated condition On 1 Off 0 of the phantom power in the same format as the command RING This command reports the presence of a Ring on the Telco port This is an indication only Command form RING Return value The Ring is sent if a valid ring has been sensed on the Telco line RING RINGEN This command changes or reports back the state of the Ring Indication Command form RINGEN lt X gt Explanation Sets the state to Off Sets the state to Ring 1 Sets the state to Ring 2 3 Sets the state to Ring 3 4 Sets the state to Ring 4 Null Returns the current state Value NRO IA Return values The command will return the updated condition of the Ring Indication in the same format as the command RXRD This command controls or reports the Receive Reduction control of the unit Command form RXRD lt X gt Explanation Values O Sets Receive Reduction to Off 1 Sets Receive Reduction to On 2 Toggles the current state Null Reports back the current state Return values The command returns the updated connection state of the unit in the same format as the command Technical Services Group 1 800 283 5936 USA 1 801 974 3760 Appendix C
32. ote control device 6 Connect an external amplifier or sound reinforcement system to Line Out Use Aux Out to connect recording equipment such as a VCR Nominal output is OdBu 7 Using the included connectors wire a 4 wire transmission system such as a video codec to the 4 Wire Video Codec In and Out connectors Nominal input output is OdBu 8 Connect a local microphone or input from a local sound system or mixer to Mic Line In 9 Connect the speaker wire to the red and black binding post connectors 10 Connect the power cable after making all other connections As soon as power is supplied to the unit the GT1524 initializes and all front panel LEDs and the LCD light The power module accommodates 100 240VAC 50 60Hz 22 30W For most installations the default settings in the GT1524 do not need to be changed the system can be used as soon as power is applied However if you need to customize any settings such as telephone connection options or input parameters you can do so through the front panel user interface The front panel includes a 2x16 character LCD menu buttons and LED bar meter When power is applied to the GT1524 all LEDs light and the LCD panel reads INITIALIZING If initialization is completed without errors a title screen appears showing the product name top line and the version number bottom line The title screen remains on display until you initiate some action that write
33. own at 200Hz then rolls off at 6dB per octave This feature is disabled when shipped from the factory Echo Canceller Activate or deactivate the echo cancellation feature for this input Factory default is On NLP Adjust Non linear processing NLP has four settings soft 6dB medium 12dB aggressive 18dB and Off NLP adds more echo cancelling horsepower in difficult acoustical environments Use care when increasing NLP because of the corresponding trade offs which can include suppression and half duplex operation Factory default is Soft Aux In 4 Wire In and From Telco Gain Adjust This adjusts each Input gain ranging between 20dB and 20dB in conjunction with the LCD readout and the LED bar graph The default setting is OdBu Mute This parameter mutes the input channel Technical Services Group 1 800 283 5936 USA 1 801 974 3760 If you enter a passcode cS and unlock the system you must lock it again after making any changes Otherwise the panel will remain unlocked and accessible to anyone Installation LCD Programming AGC The input can use automatic gain control AGC This feature keeps softer and louder talkers at a consistent transmit level This feature is disabled when shipped from the factory The target gain is 0dB and adjusts at 2dB per second The AGC start adjustment is 20dB but will adjust only 6dB Adjustments will not be made at 5dB on either side of the target 0d
34. red volume level The volume adjust procedure is the same for all channels Muting To mute and unmute 1 Select the input or output you want to mute and press Enter 3 Scroll through the parameters until you see Mute Press Enter 4 Use the A F buttons to select On then press Enter The input or output is now muted To unmute follow the same procedure but select Off to deactivate the mute function Technical Services Group 1 800 283 5936 USA 1 801 974 3760 A For optimum performance adjust all inputs to OdBu before calibrating outputs ClearOne You re Virtually There If Auto Answer is turned cS On under System settings the GT1524 answers the call after the second complete ring A ringing tone is provided to the Line and Speaker output if Ring Indication is turned on When using the DIAL cS serial port command the GT1524 automatically engages the hybrid You do not need to press the On button If Auto Disconnect is A turned On in System settings the GT1524 disconnects upon sensing loop drop or call progress tones Operation Front Panel Control Answering a call An incoming call rings on the telephone set connected to the GT1524 and speaker if one is connected to the GT1524 and causes the On LED to flash There are four ways to answer an incoming call To answer a call You can answer a call using any of the following methods e Press the On button on either th
35. rn the updated condition of the front panel Technical Services Group 1 800 283 5936 USA 1 801 974 3760 Appendix C Serial Commands LVL This command reports back the level for a given channel Command form LVL lt CH gt lt X gt Explanation Channel 1 Mic Line Input Line Output 2 Aux Input Aux Output 3 4 Wire Input 4 Wire Output 4 Telco Input Telco Output Value I Specifies an input meter O Specifies an output meter Return values The command will return the input level of the channel in the same format as the command MHP This command changes or reports back the state of the high pass filter for the Mic Line input Command form MHP lt X gt Explanation Value O Sets the state to Off 1 Set the state to On Null Returns the current state Return values The command will return the updated condition On 1 Off 0 of the high pass filter in the same format as the command MLINE This command changes or reports back how much gain is applied to the Mic Line input The three settings are OdB 25dB and 55dB Command form MLINE lt X gt Explanation Value 1 Sets the state to 55dB gain 2 Sets the state to 25dB gain 3 Sets the state to 0dB line level Null Returns the current state Return values The command will return the updated condition of the gain applied in the same format as the command Technical Services Group 1 800 283 5936 USA 1 801 974 376
36. rrent inactivity timeout before returning to the menu screen used by the unit Command form TOUT lt X gt Explanation Value 0 Disables inactivity timeout 1 15 Sets the number of minutes specified Null Returns the current number of minutes Return Values The command will return the current timeout value If the command changed the timeout the updated timeout is returned UID This command returns the unique ID number the device type and the device number of the GT1524 This command is read only The unique ID number is preprogrammed at the factory and is unique to the unit Command form UID Return Values UID returns the device type and unique ID number The unique ID is composed of an eight digit hex number assigned at the factory to uniquely identify the unit Example The following command requests the unit ID from device UID The following is returned out the serial port UID A4EF906C VER This command returns the current version of software This version is unique to a released version of software and is comprised of the DSP the FPGA and HC11 software This command is read only VER Return Values VER returns the version of software in the same format as the command The Version is composed of a major version number followed by a period and a minor version number Example The following command requests the software version The following is returned out the serial port VER 2 0 Technical Services Group 1
37. s information to the LCD panel or the GT1524 detects and displays an error If an error is displayed contact ClearOne Technical Support Menu trees Four main menu trees menu categories comprise all of the GT1524 options you can control through the front panel Inputs Outputs System and Meters see Figure 2 4 Enter each of the trees by pressing the up down buttons and scrolling to the Technical Services Group 1 800 283 5936 USA 1 801 974 3760 Installation LCD Programming appropriate menu Then press Enter To descend a menu level go deeper into the tree press Enter To ascend a menu level go back toward the top of the tree press ESC The Meter button will also access the Meter tree directly The menu trees are structured in levels such that the first level top of the tree branches into multiple subcategories see Figure 2 7 These branches typically end when an adjustable parameter or viewable value is reached Adjusting a value To adjust a parameter first verify that it is flashing If the parameter is not flashing it cannot be adjusted until you press Enter If the parameter is flashing adjust the value with the Up and Down buttons As the value is adjusted the parameter is updated immediately For example if you adjust input gain you should be able to hear the difference as it changes To store the new value press Enter To discard the change and revert back to the old value press
38. s back the echo return loss enhancement ERLE in dB Command form ERLE Return values The command will return ERLE in the same format as the command ERLE 20 Technical Services Group 1 800 283 5936 USA 1 801 974 3760 Appendix C Serial Commands FLOW This command selects or reports whether hardware flow control is enable or disabled for the GT1524 Hardware flow control is implemented using RTS and CTS Command form FLOW lt x gt Explanation Value 0 Sets flow control to Off 1 Sets flow control to On Null Returns the current mode Return values The command will return the updated condition On 1 Off 0 of the GT1524 in the same format as the command FPP This command sets and reports the current passcode setting for the GT1524 Command form FPP lt x gt Explanation Value Up button Enter button ESC button Down button Meter button Return current passcode SURWNH HIHI u Return values The command returns the current or updated condition of the front panel passcode GAIN This command changes or reports back the gain for a channel The command supports all inputs and outputs Command form GAIN lt CH gt lt X1 gt lt X2 gt X3 Explanation Channel 1 Mic Line Input Line Output 2 Aux Input Aux Output 3 4 Wire Input 4 Wire Output 4 Telco Input Telco Output Value 1 I Selects Input O Selects Output Value 2 20 to 20 to set the level Null to return the current
39. sive RENs on the telephone line may result in the devices not ringing in response to an incoming call In most but not all areas the sum of the RENs should not exceed five 5 To be certain of the number of devices that may be connected to the line as determined by the total RENs contact the telephone company to obtain the maximum RENSs for the calling area If this equipment causes harm to the telephone network the telephone company will notify you in advance that temporary discontinuance of service may be required If advance notice is not practical the telephone company will notify the customer as soon as possible Also you will be advised of your right to file a complaint with the FCC if you believe it is necessary The telephone company may make changes in its facilities equipment operations or procedures that could affect the operation of the equipment If this happens the telephone company will provide advance notice for you to make the necessary modifications in order to maintain uninterrupted service If you experience problems with this equipment contact ClearOne Communications Inc 1825 Research Way Salt Lake City Utah 84119 or by phone at 801 874 3760 for repair and warranty information If the trouble is causing harm to the telephone network the telephone company may request you remove the equipment from the network until the problem is resolved Industry Canada compliance The Industry of Canada label identif
40. tallation Connecting the unit The power cord should be connected last Otherwise the order in which you connect the cables is not important Refer to the diagram shown in Figure 2 2 when making connections H TELCO LINE AA TELCO SET VOLTAGE RANGE 100V 240V 2A Ha 4 WIREMIDEO CODEC FREQUENCY S0Hzi60Hz UNE OUT auxour FEE CAINE INL Tnt RS 232 CONTROLISTATUS z E 00008 0000000000008 e gt 0000 000000000000 Figure 2 2 GT1524 Rear panel connectors Place the unit in a standard 19 inch rack and attach it securely Connect your telephone line from the wall jack to the RJ 11 Line jack H 3 Plug your telephone set into the RJ 11 Set Jack I If you are using a custom controller for control and status plug it into the DB 25 Control Status port F ClearOne Technical Services Group 1 800 283 5936 USA 1 801 974 3760 You re Virtually There The three terminals in A A the Phoenix connector correspond with the rear panel audio contacts from left to right positive negative andy ground Negative Positive Figure 2 3 Phoenix push on connector ClearOne GT1524 Version x x Inputs Outputs System Meter Figure 2 4 Main Menu Trees Installation LCD Programming 5 Use the RS 232 port to connect the GT1524 to a PC for use with HyperTerminal an AP IR Remote Control or a custom rem
41. tion Unpacking no Ensure that the following items were received with your shipment ClearOne Communications A A is not responsible for product damage incurred GT1524 PART 910 114 101 during shipment You must make claims directly with the carrier 1 Inspect your shipment carefully for obvious signs of damage If the AC Power Cord 12 foot Telephone Cable Push on Blocks 6 E PART 699 150 006 PART 830 000 012 PART 673 016 003 shipment appears damaged retain the original boxes and packing Optional Ly Ss material for inspection by the carrier Contact your carrier e amp E Telephone OC 3 SS GT1524 eee RARA T__ Microphones immediately PART 910 103 160 or 910 103 161 Mic Cables included GT1524 Manual C shown below PART 800 114 101 Speaker PART 910 103 010 Figure 1 1 Unpacking Your GT1524 _ Controls and Connections Front panel A ClearOne D 23 Telephone EN A A E X o L A ES GT1524 y A E A B C D E F A LCD window The two line 16 character per line LCD display is used for Figure 1 2 GT1524 Front Panel Controls the GT1524 setup Level adjustments are made through a menu system and four front panel buttons B Functions that can be accessed through the front panel LCD include setup programming troubleshooting and numeric audio level and gain readouts B Enter AW Esc These buttons are used to navigate the LCD me
42. tus port pinout female Pin Definable Type Default Description O COS O 1 Yes Control Aux In to Aux Out toggle 2 Yes Status Status of Aux In to Aux Out Figure i DB 25 connector n 3 Yes Control Mute Mic Line In toggle 4 Yes Status Status of Mic Line In mute 5 Yes E Telephone On Off toggle 6 Yes S Status of tel On Off toggle All commands are 7 Yes C Auto Answer toggle momentary 8 Yes S Status of Auto Answer 9 Yes C Mute Line Out toggle 10 Yes S Status of Line Out mute 11 Yes Mute 4 Wire In toggle The first 16 pins of the 12 Yes S Status of 4 Wire In mute cS Control Status port are 13 Yes C Volume up Speaker Line 1dB programmable through 14 Yes S No connection direct serial port commanos 15 Yes C Volume down Spkr Line 1dB 16 Yes S No connection 17 No S No connection 18 No S No connection 19 No S No connection 20 No S No connection 21 No S Ring indication 22 No S No connection 23 No S 5VDC 24 No S 5VDC 25 No Ground Ground RS 232 COM DCE port pinout female Pin Number Control Pin Number Control Figure B 2 RS 232 connector 1 DCD 6 DSR 2 TXD 7 CTS 3 RXD 8 RTS 4 DTR 9 No connection 5 Ground Technical Services Group 1 800 283 5936 USA 1 801 974 3760 Appendix C Serial Commands The GT1524 accepts serial commands through the serial port The commands in this manual pertain only to the GT1524 RS 232 serial port protocol is 9 600 default 19 200
43. ufacturer have been made or attached to the product which in the determination of the Manufacturer shall have affected the performance safety or reliability of the product or D The product s original serial number has been modified or removed NO OTHER WARRANTY EXPRESS OR IMPLIED INCLUDING WARRANTIES OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR USE APPLIES TO THE PRODUCT MANUFACTURER S MAXIMUM LIABILITY HEREUNDER SHALL BE THE AMOUNT PAID BY THE END USER FOR THE PRODUCT No person or entity authorized to assume any obligation or other liability in connection with the products No action regardless of form arising out of or relating to the product or this Warranty may be brought by end user more than one 1 year after the cause of action has accrued Technical Services Group 1 800 283 5936 USA 1 801 974 3760 Appendix E Compliance Manufacturer shall not be liable for punitive consequential or incidental damages expenses or loss of revenue or property inconvenience or interruption in operation experienced by the end user due to a malfunction in the purchased product No warranty service performed on any product shall extend the applicable warranty period In case of unsatisfactory operation the end user shall promptly notify the Manufacturer at the address set forth below in writing giving full particulars as to the defects or unsatisfactory operation Upon receipt of such notice the Manufa
44. utput channel Return values The command will return the current default meter in the same format as the command Technical Services Group 1 800 283 5936 USA 1 801 974 3760 Appendix C Serial Commands DIAL This command generates DTMF tones This capability remains active after the call is placed so tones can be issued for use with voice mail and pagers Command form DIAL lt STRING gt Explanation STRING is any valid combination of touch tone characters A comma indicates a two second pause STRING has a maximum length of 15 characters Valid characters are 0 through 9 A through D and Return values DIAL returns the dialed string of numbers For example the following command dials the number 801 975 7200 DIAL 9 8019757200 A 9 and a pause are generated to get an outside line on a PBX The following is returned out the serial port DIAL 9 8019757200 EC This command changes or reports back the state of the echo canceller Command form EC lt X gt Explanation Value 0 Sets the state to Off 1 Sets the state to On Null Returns the current state Return values The command will return the updated condition On 1 Off 0 of the echo canceller in the same format as the command ERL This command reports back the echo return loss ERL in dB Command form ERL Return Values The command will return the ERL in the same format as the command ERL 20 ERLE This command report
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