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- changed if ISDN port is blocked, calls are rejected with cause 44 now
- added allowing schedule of graceful activate/reboot when no calls are affected
- added support for callgroups
- added option max_simultaneous call for SIP groups
- added improved network troubleshooting
- added support for SNMPv3 UDP/TLS
- added config option t38_ignore_offer
- added contact_all_setting allowing to modify registration contact header
- added monitored_sip_peer option to allow shutting down ISDN ports when SIP peer goes down
- added improved time settings configuration, Summer/Wintertime change now configurable
- fixed issues in time settings management
- fixed issues during factory reset
- fixed showing used ISDN channel in CDR when call was rejected directly after SETUP
- fixed backup/restore of hostname
- fixed not accepting bye from caller in early dialog on SIP to SIP calls
- fixed issues with GSM table not loading
- fixed not setting contact in validating OPTIONS packets, when validating without registration
- fixed dnssrv request for peers configured with TLS
- fixed GSM/LTE unicode converter
- fixed restoring NTP host from backup
- fixed not using configured dtmflen value, when rfc2833_passthrough=0
- fixed memory leak when using validate without registration
- fixed handling of an re-invite not containing SDP
- fixed sending out rfc2833 events when dtmfmode=inband was used
- fixed not refreshing DHCP anymore when request failed
- fixed problem adding some network routes
- fixed issue correctly deleting and deregistering cloud settings on factory reset
- fixed number prefixing when failover_account is used, using settings from failover account
- fixed crash when restarting ISDN port that was not configured
- several GUI fixes and improvements
- GUI allowing multiple selection and deletion of SIP groups
- GUI fixed dialplan javascript delete issue
- GUI added from_display and other variables to list of selectable SIP settings
- GUI added cancel button to Full-Trace
- GUI added additional options for managing Full-Trace
- GUI added ajax refresh for active calls
- disabled PRACK support by default, if not explicitly enabled via experimental option enable_prack
- disabled support for SNMP traps
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