The good old private exchange now comes with an IP core and runs a barrage of new apps like UMS
Multiple-skills pool and proximity to user sites are must-have attributesâ€¦ and donâ€™t forget the SLAs
DWDM for backbone, SDH for access; CWDM for metros and ASON for futureâ€”buying is almost a formula!
For greater reliability and performance, itâ€™s better to have a number of hot-swappable components
Softswitches are robust enough to be put at the core, and they have a clear edge over their TDM counterparts