[Asterisk-Users] overriding DTMF and codec from dialplan?

[Roy Sigurd Karlsbakk]

> is it possible, from an agi script or directly in extensions.conf, to 
> override the DTMF and codec settings?

to answer my own question
SetVar(SIP_CODEC=g726)
allowed me to force g726, but only on outgoing calls.
when dialling in from the iax server, I do the same, setting the codec 
etc, but this does not work. sip show channels only shows the channel 
using alaw

roy