Internet telephony can be risky. You cannot control the number of carriers and how packets are routed. Voice in the data lines is as secure as other applications in the IP infrastructure. Still, it offers better security than traditional telephony. However, being better than traditional telephony does not mean that it offers complete security. There are a few vulnerabilities linked with VoIP in Canada and these vulnerabilities are being addressed. VoIP is growing.
Please read the originial post here: https://telecommetricwp.wordpress.com/2020/06/10/is-voice-over-internet-protocol-secure-enough/