[Asterisk-Users] IAX DTMF question

[Eweka Internet Services]

Hi ,

I have 2 Asterisk boxes wired together with IAX.

When i am making a call with sip from box one through IAX to the other box
( box 2 ) i'm unable to select menu options with DTMF.

When i'm making a straight call into box 2 with either Oh323 or sip i am
able to select the menu options.

Is IAX incapable of DTMF , or does it require extra options ?

Kind regards,

Wijnand