Twilio 響鈴20秒后不撥號碼語音信箱可以嗎? [英]Twilio ring for 20 seconds and then voicemail without dialing a number is it possible?
Twilio可編程語音-如何防止<gather>如果電話被答錄機接聽,則提示播放</gather> [英]Twilio Programmable Voice - How to prevent <Gather> prompt from playing if the call is picked up by an answering machine