ClearOne comm GT1524 operation manual Introduction, Features

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CHAPTER 1: Introduction

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 digital 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 4Ω speaker, eliminating the need to provide external amps for the speakers.

Features

•Easy design, programming, installation, and maintenance.

•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.

•Integrated touch-tone dialing for easy dialing through remote control.

•ClearOne’s digital signal processing technology ensures crystal-clear audio with the deepest, most reliable hybrid null.

•8kHz sampling rate allows continual adaptation to telephone-line conditions.

•Acoustic echo cancellation (single channel) >120 ms DSP bases.

•Full-time telco echo cancellation with 31 millisecond tail time.

•Lockout front panel access for security.

•Phoenix push-on blocks make pin-for-pin wiring easier.

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 Table of Contents IiiAppendices Features IntroductionTechnical Support Professional Services GroupSales and Customer Service ClearOne Communications EuMEA GmbHUnpacking Controls and ConnectionsFront panel Rear panel Introduction ~ Controls and ConnectionsTelephone line requirements Equipment placementOperational Requirements Introduction ~ Operational RequirementsTechnical Services Group ~ 1-800-283-5936 USA ~ Hardware Setup Connecting the unitLCD Programming Menu treesInstallation ~ LCD Programming Adjusting a valuePower-Up Screen Aux In, 4-Wire In, and From Telco InputsMic/Line System Speaker/Line Out, 4 Wire Out, and To TelcoOutputs Aux OutSet Passcode RS-232Telco Meters TimeoutDefault Meter Unit ID NumberFront Panel Control Controlling volumeTo adjust the volume MutingMaking a call Disconnecting a callAnswering a call Operation ~ Front Panel ControlCustom Control Custom controller optionsOperation ~ Custom Control Technical Services Group ~ 1-800-283-5936 USA ~ Appendix a Specifications AppendicesAppendix B Pinouts Control/Status port pinout femaleRS-232 COM DCE port pinout female Error codes Appendix C Serial CommandsCommand structure Appendix C ~ Serial CommandsGT1524 Serial Commands AGC ExplanationReturn values Auxmix BaudDfltm Dial ERLErle Flow FPPGain Hookd Appendix C ~ Serial Commands ExampleHook LFPLVL MHPMline Mute NLPNull Rxrd RingRingen Return valueTamode TerlTerle Tout UIDVER Warranty This Warranty is Void ifAppendix E Compliance FCC Part 15 complianceFCC Part 68 compliance Industry Canada compliance Appendix E ~ ComplianceLimits Index Index ~ S-Z
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