Maybe caused by the wrong ringback tone config. Please go to “IP Group Config-IP Profile”.
Ringback Tone to PSTN Originated from: Local
Ringback Tone to IP Originated from: PSTN
Mon ~ Fri: 9:00 ~ 19:00
1402, Jingting Building, Guangming District, Shenzhen City, Guangdong Province, China
zchen@equiinet.cn

