Tuesday, September 07, 2004
VOIP vs PSTN
It's no secret that carriers are looking to move from traditional, circuit-switched voice to voice-over-packet technologies. In a way, of course, they have already done this years ago with Asynchronous Transfer Mode (ATM), but ATM's fixed-length micropackets (cells) and connection orientation were adopted specifically to be voice-friendly. What's new is the wholesale move to the variable length and connectionless orientation of Internet Protocol (IP) packets, which are definitely not the obvious architecture of choice for voice.
posted by Dietrich Bonhoeffer at 5:02 PM