ETA-A5410
Experimental Telephony Adaptor for the Audio4-5410

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Brochure: eta5410br.pdf (262 KB)
Schematic: eta5410sch.pdf (49 KB)


Description

Description

The ETA-A5410 is a small 2.4" x 2.1" experimental telephony adaptor which can be installed directly onto existing daughter card receptacles located on the AUDIO4-5410 mother board.

The ETA-A5410 comprises an optically isolated (transformerless) DAA and essentially re-configures the Audio4-5410 circuitry to provide the following functions:
  • Phone line simulator interface through Audio4-5410 Channel A (left) Input jack (note: an audio cable with mini audio jack on one end, and RJ-11 connector on the other, is provided with the ETA-A5410 adaptor);
  • Line side Tip and Ring diode bridge;
  • DSP-side Off Hook control via the DSP's McBSP1 FSR output;
  • DSP-side Ring detection via the DSP's Interrupt2 and McBSP1 DR inputs;
  • DSP-side Caller ID detection via the DSP's McBSP1 FSX input;
  • CODEC A is disabled to free up control signals for use with the DAA;
  • CODEC B (right RX input) receives A/C coupled audio output from the DAA;
  • CODEC B (right TX output) is A/C coupled to the DAA audio input;
  • Buffers and biases microphone via Left Channel B audio jack and
  • patches signal into CODEC B left channel audio input;
  • Buffers and routes CODEC B right channel audio output to headphone right channel;
  • Buffers and routes CODEC B, eft channel audio output to headphone left channel.

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DISCLAIMER:

Please note that the ETA-A5410, described herein, is for experimental use with appropriate laboratory grade telephone line simulators only. Connection to federally regulated telephone company (TELCO) phone lines or equipment is a misapplication of this product and is explicitly not authorized.

Domain Technologies, Inc. does not warrant that the ETA-A5410 is fit for any purpose or application and hereby disclaims any liability arising out of any use or misapplication.



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