2.1 Changing the internal number
If you've changed the internal number of a VoIP account in freedom.voys.nl, the internal number displayed on your device won't change automatically. This is because the number shown on your device's display is separate from the information in Freedom.
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2.2 Encrypted calling
By default, calls between your device and Voys' telephony platform are unencrypted over your network and the internet. Using encryption ensures that your calls are encrypted only between your phone and our platform.
Both the SIP packets and the audio itself (RTP) can be encrypted. This ensures that no one can eavesdrop on your call by intercepting network packets. We use TLS to encrypt the SIP packets. RTP audio is secured using SRTP.
This guide only describes how to enable encrypted calling.
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