Use this option to set the NLP operating mode: Adaptive or Fixed. With Adaptive NLP, the level of the comfort
noise is constantly adapted as the level of the actual background noise varies. With Fixed NLP, the
comfort noise level is not changed after it is initially set up. See 1814-03: NLP Enable [System: VoIP: Profile (1-4): Echo Canceller (1814): NLP Enable] for more.