Firmware/V8/Release Notes/8.3.3/Bugfix

Better audio quality (especially no microphone saturation).
Dual Audio button works now. (SCPP-1162)
Fixed duplicate pickup information in call pickup screen. (SCPP-1102)
Added new setting cancel_conference to allow disconnecting all conference members with cancel key. (SCPP-1069)
Number guessing minimum length will work only in state edit number in numeric edit mode.(SCPP-1030)
When creating a new entry in the directory, the edit button did not work.
MWI led has to blink in all states.
Added more flexible way of configuring IPv6 gateway.
OCS: Remove "Reboot warning" when setting up OCS account. (SCPP-1014)
Call Pickup did not work with multiple registrations. (SCPP-991)
Call was sometimes not released properly. (SCPP-1207)
Device Feature Key Sync did not correctly handle Forward Events.
OCS: Phone should not attempt to reregister as long as password prompt is active. (SCPP-1009)
Answering a call was failing and log said: "Failed to allocate any local SIP port!". (SCPP-1042)
Reregister asap if TCP/TLS register connection goes down. (SCPP-1109)
Sending DFKS subscriptions due to state transitions only to the active line.
The webclient re-initiates a handshake when handling a challenge. It will never try to use an existing connection anymore.
Firmware update wasn't using HTTP proxy when specified.