I cannot find the place in the Windows interface to change the codec and the DTMF options.
Can somebody help?
Hi,
Check the guides below:
https://www.zoiper.com/en/support/home/article/30/Navigating_a_voice_menu___IVR_with_DTMF
https://www.zoiper.com/en/support/home/article/35/Bad_Audio_Quality#windows
The codec selection menu is under Accounts -> your SIP account -> Advanced.