ONT POTS port code mode. Options: 1. pcmu(1) - Audio data is encoded as eight bits per sample, after logarithmic scaling PCMU denotes mu-law scaling. 2. reserved1(2) - Reserved. 3. reserved2(3) - Reserved. 4. gsm(4) - GSM denotes the European GSM 06.10 standard for full-rate - speech transcoding, ETS 300 961, which is based on RPE/LTP (residual pulse - excitation/long term prediction) coding at a rate of 13 kb/. 5. g723(5) - Dual-rate speech coder for multimedia communications transmitting at 5.3 and 6.3 kbit/s. 6. dvi4ClockRate8000(6) - DVI4 uses an adaptive delta pulse code modulation (ADPCM) encoding scheme that was - specified by the Interactive Multimedia Association (IMA) as the IMA ADPCM wave type, - and the clock rate is 8000HZ. 7. dvi4ClockRate16000(7) - DVI4 uses an adaptive delta pulse code modulation (ADPCM) encoding scheme that was - specified by the Interactive Multimedia Association (IMA) as the IMA ADPCM wave type, and the clock rate is 16000HZ. 8. lpc(8) - LPC designates an experimental linear predictive encoding contributed by Ron Frederick, - which is based on an implementation written by Ron Zuckerman posted to the Usenet group comp. 9. pcma(9) - Audio data is encoded as eight bits per sample, after logarithmic scaling. PCMA denotes A-law scaling. 10. g722(10) - 7 kHz audio-coding within 64 kbit/s. 11. l16TwoChannels(11) - Two channel encoding. 12. l16OneChannel(12) - One channel encoding. 13. qcelp(13) - QCELP CODEC compresses each 20 milliseconds of 8,000 Hz. 14. cn(14) - Comfort Noise. 15. mpa(15) - MPA denotes MPEG-1 or MPEG-2 audio encapsulated as elementary streams. 16. g728(16) - Coding of speech at 16 kbit/s using low-delay code excited linear prediction. 17. dvi4ClockRate11025(17) - DVI4 uses an adaptive delta pulse code modulation (ADPCM) encoding scheme that was specified - by the Interactive Multimedia Association (IMA) as the IMA ADPCM wave type, and the clock rate is 11025HZ. 18. dvi4ClockRate22050(18) - DVI4 uses an adaptive delta pulse code modulation (ADPCM) encoding scheme that was specified - by the Interactive Multimedia Association (IMA) as the IMA ADPCM wave type, and the clock rate is 11025HZ. 19. g729(19) - Coding of speech at 8 kbit/s using conjugate structure-algebraic code excited linear prediction. 20. t38(20) - T.38 is used by the IFP peer to verify message alignment. It is identified by an ASN.1 Application tag. 21. autoSelect(21), - Auto Select. 22. g711alaw(22), - G.711 A Law. 23. g711Mulaw(23), - G.711 Mu Law. 24. g722dot1(24), - G.722.1. 25. g722dot2(25), - G.722.2. 26. g723dot1(26), - G.723.1. 27. g726(27), - G.726. . 28. g729A(28), - G.729 annexes A . 29. g729B(29), - G.729 annexes B . 30. g729D(30), - G.729 annexes D . 31. g729E(31), - G.729 annexes E . 32. melp(32), - MELP code. 33. invalidCode(-1) - Invalid code