Ive seen some devices by Comrex that are called “frequency extenders”. Are these POTS Codecs?
No, they are not. Frequency extension is an early technology, developed by Comrex and introduced in 1976, to improve the quality of audio transmission over POTS lines. While many of the thousands of frequency extenders remain deployed, our introduction of the ?rst high-quality, dependable POTS Codecs in 1996 again redefined remote audio transmission over POTS. For more information on frequency extenders, visit the LXT/R product page.
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