sip中断的好处是什么？
along with being cheaper and easier to scale, sip trunking may help reduce charges from toll-free and long-distance phone calls as they’re being placed over the internet and not on the wired phone network where those sorts of fees typically apply. likewise, businesses can consolidate billing by having their data and voice services on a single ip network instead of being separate.
pl
voxbone.
思索
vonage业务
alliancephones.
nextiva.
带宽
1-voip