What can I do about poor voice quality when using softphone?
Remove the following codecs from the list of available codecs in the SIP gateway on the XPhone Connect administration interface (Telephony > Gateways > SIP) or alternatively put them in the back of the list
Poor voice quality during conferences in connection with Softphone may occur due to a set bypass media flag. Remove this flag in the SIP gateway on the XPhone Connect administration interface (Telephony > Gateways > SIP).
Set the following registry keys on your client computer:
Name: Do not use NLA
→ fixes choppy voice transmission
→ fixes distorted speech transmission
The registry keys and the ReadOnly key do not exist and must be created by hand.
Type Name Value Corresponds to
String JitterBufferSize 0 JITTER BUFFER
String NAudioSinkBufferSize 25 BUFFER
String NAudioSourceBufferSize 25 BUFFER
The lower two BUFFER values must always be identical. You can increase the default value from 25 to 100 for the first adjustment, and then increase it further in steps of 20.
The Frame Size setting can be found in the attachment under Explorers > Voice Gateway > Codec Parameters.
Also check the steps from the following article: