ocr: % 20 1 10 8 2 0,35 2 3 6 9 12 18 30 S Time CCITT-49120 Consccutive signal units reccived in error for 350 ms will initiate changeover. Note - The curve is based on a uniform distribution of errors. Data Number of signal units transmission rate X Y 2400 bit/s 31+1 2500 4 kbit/s 50 4200 56 kbit/s 700 58800 Note - The signal unit error rate monitor can also be defined by the following parameters: a) X consecutive signal units received in error, b) 2% of signal units in error out of Y received signal units. FIGURE 24/Q.291 Signal unit error rate monitur characteristic
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