ClearOne comm GT1524 operation manual Rear panel, Introduction ~ Controls and Connections

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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

GH I

AB

Figure 1.3. GT1524 Rear panel connectors

CDE F

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 0dBu.

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 0dBu.

Technical Services Group ~ 1-800-283-5936 (USA) ~ 1-801-974-3760

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Contents Audio Products GT1524 Single Channel Echo Canceller GT1524 Single Channel Echo Canceller GT1524 Installation ClearOne Part No June 2002 Rev Iii Table of ContentsAppendices Introduction FeaturesSales and Customer Service Professional Services GroupTechnical Support ClearOne Communications EuMEA GmbHUnpacking Controls and ConnectionsFront panel Introduction ~ Controls and Connections Rear panelOperational Requirements Equipment placementTelephone line requirements Introduction ~ Operational RequirementsTechnical Services Group ~ 1-800-283-5936 USA ~ Connecting the unit Hardware SetupMenu trees LCD ProgrammingAdjusting a value Installation ~ LCD ProgrammingPower-Up Screen Aux In, 4-Wire In, and From Telco InputsMic/Line Outputs Speaker/Line Out, 4 Wire Out, and To TelcoSystem Aux OutSet Passcode RS-232Telco Default Meter TimeoutMeters Unit ID NumberTo adjust the volume Controlling volumeFront Panel Control MutingAnswering a call Disconnecting a callMaking a call Operation ~ Front Panel ControlCustom Control Custom controller optionsOperation ~ Custom Control Technical Services Group ~ 1-800-283-5936 USA ~ Appendices Appendix a SpecificationsAppendix B Pinouts Control/Status port pinout femaleRS-232 COM DCE port pinout female Command structure Appendix C Serial CommandsError codes Appendix C ~ Serial CommandsGT1524 Serial Commands AGC ExplanationReturn values Auxmix BaudDfltm Dial ERLErle Flow FPPGain Hook Appendix C ~ Serial Commands ExampleHookd LFPLVL MHPMline Mute NLPNull Ringen RingRxrd Return valueTamode TerlTerle Tout UIDVER This Warranty is Void if WarrantyAppendix E Compliance FCC Part 15 complianceFCC Part 68 compliance Appendix E ~ Compliance Industry Canada complianceLimits Index Index ~ S-Z
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