DTMF Send Cadence is too long . Please go to “Advanced>Media Parameter”. Set send cadence as 120, 100 or 80. Try each for effect. The waiting time is usually about 10s.

Mon ~ Fri: 9:00 ~ 19:00
1402, Jingting Building, Guangming District, Shenzhen City, Guangdong Province, China
zchen@equiinet.cn

