Operation Manual

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ASPI Digital -
The Sound of DSP
Technical Support: 404.892.3200 11
Note.
The EchoFree™ EF200 Phone Add provides a full duplex inter-
face between a four-wire audio system and a two-wire telephone
line. It allows a telephone caller to be brought in to any four-wire
audio system. The EF200 is similar to a digital hybrid, but with
many more features and capabilities. The primary function of the
EF200 is the line echo canceller (LEC), which digitally eliminates
reflections from the telephone hybrid. The EF200 is the recom-
mended Phone Add for any application.