Hi Keith,
My question was targeting the Osmocom stack and not the (external)
PBX. I already found some AMR patches for Asterisk (it seems it is
still not part of mainline), will try to do that.
The second half of my question was somewhat vaguely tries to ask if it
is possible to do AMR when the call is MO-MT directly, or maybe the
MGW can do transcoding, so in a nutshell: maybe there is a solution to
do GSM FR when the call is outbound from the mobile network and AMR
when it is mobile to mobile. Or the transcoding path is also an
option. Point is: about these capabilities there is very little
information available about what is supported and what is not within
the Osmocom domain.
Regards,
Csaba