Five rules for five nines
VoIP network designers share this advice for building a fail-proof infrastructure for IP telephony.
Test the network: Determine IP traffic bandwidth availability, jitter and delay before deploying.
Duplicate: Run redundant call-processing servers and separate them geographically if possible.
Duplicate, again: Make sure call-processing servers themselves have redundant processors, network interface cards and disk drives.
Patch often: IP PBXs are servers, so keep them updated with the latest operating software fixes.
Batteries included: Plan on back-up power supplies for call processors, routers, switches and phones.
