Does Asterisk support the following GSM codec?
- GSM-HR: GSM Half Rate (GSM 06.20): en.wikipedia.org/wiki/GSM-HR
- GSM-EFR: GSM Enhanced Full Rate (GSM 06.60): en.wikipedia.org/wiki/GSM-EFR
No. I’m not aware of any open source implementations which suggests they may still be encumbered by patents.
Yeah, Asterisk only does old-school GSM-FR.