# Learning

##### Official URLs

Documentation

- [PBX GUI Home - PBX GUI - Sangoma Documentation (atlassian.net)](https://sangomakb.atlassian.net/wiki/spaces/PG/pages/13172873/PBX+GUI+Home)

Community

- Asterisk: [https://community.asterisk.org/](https://community.asterisk.org/)
- FreePBX: [https://community.freepbx.org/](https://community.freepbx.org/)

Github

- Asterisk: [https://github.com/asterisk](https://github.com/asterisk)
- FreePBX: [https://github.com/freepbx](https://github.com/freepbx)

##### Speech Recognition (Speech to Text)

Vosk-API

- [Vosk speech recognition modules for Asterisk](https://github.com/alphacep/vosk-asterisk)
- [https://alphacephei.com/vosk/integrations](https://alphacephei.com/vosk/integrations)
- [Offline Speech to Text for Desktop Linux](https://github.com/ideasman42/nerd-dictation)

##### Kamailio

- [Handling SIP Flood Attacks Using Kamailio](https://www.fredposner.com/2367/handling-sip-flood-attacks-using-kamailio/)

##### Secure SIP Server

- [APIBAN](https://apiban.org/doc.html)
    - [Apiban Clients](https://github.com/palner/apiban)
    - [Block unwanted SIP traffic efficiently](https://blog.telecomsxchange.com/block-sip-attack/)

##### SIP Monitoring

- [sipexer - Modern and flexible SIP cli tool](https://github.com/miconda/sipexer)

##### Auto Provisioning

- [OSS End Point Manager - PBX GUI - Documentation (freepbx.org)](https://wiki.freepbx.org/display/FPG/OSS+End+Point+Manager)
- [https://www.voip-info.org/forum/threads/oss-epm-for-freepbx-16-ipbx-2027.26880/](https://www.voip-info.org/forum/threads/oss-epm-for-freepbx-16-ipbx-2027.26880/)

##### WebRTC

- [InnovateAsterisk/Browser-Phone](https://github.com/InnovateAsterisk/Browser-Phone)
- \[Video\] [WebRTC Browser Phone with Asterisk & Raspberry Pi](https://www.youtube.com/watch?v=mS28vfT8wJ8)

##### Billing

- [MagnusBilling](https://www.magnusbilling.org/)

##### HA with DRBD

- [VitalPBX High Availability](https://vitalpbx.com/blog/pbx-high-availability-with-vitalpbx-guide/)