The telephone network or PSTN will not differentiate between fastened and non-fastened VoIP. Calls designed to/made from set VoIP and non-preset VoIP numbers are handled in a similar method. Safety is paramount in any enterprise ecosystem, and non-VoIP techniques normally present/provide/warranty the next level of encryption/protection/security to safeguard delicate information. https://edwina333cwq7.thecomputerwiki.com/user