20.x Firmware


20.05 - 16.12.2020


* changed if ISDN port is blocked, calls are rejected with cause 44 now
* disabled PRACK support by default, if not explicitly enabled via experimental option enable_prack
* 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
* 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
* 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
* 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



20.04.01 - 13.08.2020

20.04 - 07.08.2020


20.03 - 05.06.2020


20.02 - 19.02.2020

GUI-Mode: Reloading the browser cache can be required. Use CRTL+SHIFT+R or CTRL+F5 or SHIFT+F5 to reload it

20.01 - 06.02.2020


19.x Firmware

19.07 - 11.12.2019

19.06 - 18.10.2019

19.05 - 02.10.2019

19.04 - 30.09.2019

19.03 - 28.08.2019

19.02 - 06.08.2019


19.01 - 27.06.2019

Most notable changes in comparison to current 16.15 firmware:

16.x Firmware

16.17 - 19.11.2019

16.16 - 24.09.2019

16.15 - 19.06.2019

16.13 - 29.03.2019

16.12 - 11.01.2019


16.11 - 16.08.2018

16.10 - 05.07.2018

16.09 - 23.04.2018

16.08 - 07.11.2017

16.07 - 25.07.2017

16.06 - 28.06.2017

16.05 - 27.01.2017

16.04 - 22.12.2016

16.03 - 29.11.2016

Known Issues:


3.0 STABLE - Firmware

3.0.19 - 25.07.2017

3.0.18 - 24.05.2017

3.0.17 - 03.02.2017

3.0.16 - 18.01.2017

3.0.15 - 12.01.2017

3.0.14 - 10.01.2017

3.0.13 - 29.11.2016