Thanks for the confirmation Harald. It seems that is the case. Best Regard, Ron Menez ron.menez@entropysolution.com<mailto:ron.menez@entropysolution.com> On May 24, 2017, at 11:07 PM, Harald Welte <laforge@gnumonks.org<mailto:laforge@gnumonks.org>> wrote: Hi Ron, did you verify that your sowtswitch actually supports encoding/decoding of the GSM HR Codec? You must make sure that all involved parties understand the same codec. https://wiki.freeswitch.org/wiki/Codecs doesn't list anything but full rate and AMR. -- - Harald Welte <laforge@gnumonks.org<mailto:laforge@gnumonks.org>> http://laforge.gnumonks.org/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)