With the upcoming move to VOIP for home users wishing to keep "landline" type voice services it's worth considering the security of this type of service.
While the business sector is usually up to speed with this, security is not often mentioned, if at all for home users.
It's relevant for Plusnet users who will have to use 3rd party VOIP services.
While the service providers should address most of the issues it worth asking what they provide in the way of security and which configurations should be used to maximise security.
The following article is business based but equally relevant to home users using VOIP.
https://business.bt.com/insights/voip-security-guide/
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