I have heard alot of discussions with DID, DNIS, ANIS, VDN, PSTN, etc. Are these all the same but just different terminologies depeneding on if you are Bell, Sprint, Tellus, AT&T, MCI or whom ever or is there more to it?
Thanks in advance.
==========================================================
Does anyone have a quarter, I need to make a phone call?
Thanks in advance.
==========================================================
Does anyone have a quarter, I need to make a phone call?