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OCR: ms 3.0 2.5 . 2.0 distor ay 1.5 1,0 0.5 400 800 1200 1600 2000 2400 800 3200 Hz Frequency CrT 49021 *Frequency band with charact Leristics for Signatling System No. 6 The toleranee schene 15 taken trom Recomnendation M.1020. Nota The timits shown in this : Figure arc under study Proposed changes : 4re shown in Anriex Ato Recotutenda- tion 0.272. FIGURE 16/Q.272 Permissible variation of overall delay distortion with frequency for the vyoice freguency channe CCHTT Signalling Trou Anicx voice channei