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System Overview
8
Reliability and Recoverability
DEFINITY Enterprise Communications Server Release 8.2
Overview
555-233-002
Issue 1
April 2000
Reliability and Recoverability
The system is designed to recover from a power outage or other failure instantly,
regardless of the source of the failure. Each port network includes a set of segmented,
parallel buses. If one of the paired segments fails, the other bus segment continues to
handle communications. You can always further enhance the system’s reliability by
duplicating critical components such as processors or fiber-optic links between port
networks.
Configuring for Reliability/Recoverability
DEFINITY ECS can be configured to meet the disaster recovery needs of any business.
For example:
■ Calls can be routed through an alternate DEFINITY ECS if one site is destroyed or
disabled by natural or man-made disaster.
■ Multimedia (voice, video, data) connections to the network can all be made
redundant, in case of network failures. The system can be routed through multiple
public exchanges to protect against network failures (a cable or fiber being cut, for
example).
■ DEFINITY's universal hardware and flexible software allow systems to be re
configured quickly in emergency situations. Port networks can be added and
network routing can be changed in a matter of minutes.
■ The TN2211 Optical Drive will replace the present TN1656 Tape Drive. The new
Optical Drive will provide the same functionality as the Tape drive, such as, storage
for software upgrades, translation backups, announcement file backups, core
dumps, etc. It is also faster than the Tape Drive. A full backup to the Optical Drive
will take approximately 20 minutes. The present Tape Drive backup takes about 95
minutes.
Survivable Remote EPN (SREPN)
The Survivable Remote Expansion Port Network (SREPN) allows a DEFINITY ECS (R6r
or later) EPN to provide service to the customer when the link to the main processor fails
or is severed or when the processor or CSS fails. When the links to the DEFINITY ECS
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