What is the major advantage of designing and placingVoIPand Internet telephony in a clients organization?
A.
It is cheap but you still need a PBX regardless
B.
The PSTN is doomed to be EOL in 5 years and this is the replacement.
C.
It avoids the tolls charged by ordinary telephone service
D.
Even without QoS it is much clearer that PSTN technology.