Feature codes

after dialing feature codes, i can get connected to the feature, but asterisk will not recognize any subsequent dial

e.g dialing *69 will tell me the last caller’s number, and it says “…, to dial this number, press 1”. then no matter what I dial, it just says “bye” after several seconds.

this happens to other feature code dial too, I really don’t know what is the problem. somebody pls help!

this problem is solved.

in the VoIP configuration, change the DTMF Transfer Mode to RFC2833, the problem can be solved.