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Figure 14. Ring Cadence of FXO Gateway.Finally , if you have no idea what is Ring Cadence of PABX or PSTN, you can trysetting the ON time and OFF time to 1000 (1 second) and 8000(8 seconds), see Figure15.Figure 15. Ring Cadence of FXO Gateway.15<strong>Welltech</strong> Technology <strong>Co</strong>., <strong>Ltd</strong>. Released Version 1.0