- Store conversations to a single file
- Server-side audio codec bitrate limitation
- Server can set max throughput
- Transmission interval (delay between packets)
- IPv6 support
- TTS events in class-room channels for accessibility client
- Windows Firewall exception during install
- Speex VBR codec
- CELT 0.11.1 codec (CBR and VBR mode)
- CELT codec (0.5.2) in TeamTalk 4.1 and earlier is now obsolete