| 释义 |
virtual Centrex 1. A Centrex technique that networks multiple geographically distributed CO Cen- trex systems, thereby creating the effect that all users are collocated and served by a single CO switch. See also Centrex. 2. IP Centrex, which is Centrex service based on a softswitch platform and delivered over the Internet, rather than based on a central office (CO) circuit switch and delivered over the public switched telephone network (PSTN). See also Centrex, CO, Internet, PSTN, and softswitch. |