I have a grandstream 488 using FXO port. With asterisk 1.2.23 When I have DTMF mode set to RFC2833 (asterisk and grandstream) and I use a call file and AGI to originate the call I dont get the DTMF tones on the device. If I do it manually from a polycom 550 (set for RFC2833) it works. When I change the DTMF mode to inband on both asterisk and grandstream and use the call file it now works. If I now use the polycom 550 (still set for RFC2833) and manually call this does not work anymore - the grandstream is still set to inband now. What kind of issue am I having? Thanks, Jerry