ocr: dB 5 3 s 3 o * 0 2 800 1000 2000 2800 3000 Hz 0 300 500 CCITT-37042 Frequency * Frequency band with delined characteristics for Signalling System No. 6. Note I - Alternative relaxed limits are shown in Annex A to Recommendation otherwise Q.272. Note 2 - Below 300Hzandabove. 3000Hzthe lossshallnot be less than0.0dB but IS unspecified. FIGURE 15/Q.272 Limits for overall loss of the transfer link relative to that at reference frequency
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