00:40 Dial Tone Signal Analysis
01:20 Ring Back Tone Signal Analysis
02:00 Ring Tone Signal Analysis
02:52 Busy Tone Signal Analysis, Signal Capture, FXO Port Settings
04:59 Polarity Reversal Signal Analysis, Signal Capture, FXO Port Settings
05:31 Caller ID Signal Analysis and FXO Port Settings
07:07 What is FSK
07:49 What is DTMF
Article Reference
Analog Caller ID Analysis: https://support.yeastar.com/hc/en-us/articles/217490397-Why-There-is-No-Caller-ID-for-Analog-Line-
Analog Busy Tone Analysis: https://support.yeastar.com/hc/en-us/articles/217454567-Why-Analog-Trunk-Keep-Busy-
Analog DTMF Tone Analysis: https://support.yeastar.com/hc/en-us/articles/360038790193-How-to-Check-DTMF-Wave-
Video Reference
How To Check Analog Caller ID: https://youtu.be/gtAVf1nrpTE
04:48 Analog DTMF Analysis in Analog in the video: https://youtu.be/NkbuYdXJq3w
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