When the phone is unresponsive, it will go to the other person's voicemail and voice messages, and the other party can listen to the voice message afterwards.
1,ZYCOO Phone System -> Advanced -> Voicemail.
2,ZYCOO Phone System-> Advanced ->Feature Codes-> Voicemail.
3,How to config on the Phone?
Press Line key on the phone, enter voicemail password, listen to voice prompt message, listen to voice message.