A traditional PBX system makes use of conventional telephone strains, although a VoIP system takes advantage of the internet to send out and acquire cellular phone phone calls. VoIP cell phone support is greatly applied currently, Despite the fact that 1 disadvantage is the fact that a VoIP link depends upon an Connection to the internet to handle

?????????? ?????? ?????????????????????????????????????????????????Lifestyle Shopping Mall???????????????????????????????????????????????????????????????????????????????????????65.5????????4D????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????