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Assessment Title
Rule Text
The Enterprise Voice, Video, and Messaging system connecting with a DISN IPVS must be configured to signal with a backup Multifunction Soft Switch (MFSS) (or SS) if the primary cannot be reached.
Description
Discussion Text
Redundancy of equipment and associations is used in an IP network to increase the availability of a system. Multiple MFSSs in the DISN NIPRNet IPVS network and multiple SSs in the DISN SIPRNet IPVS network have been implemented to provide networkwide redundancy of their functions. They are intended to work in pairs so that one can provide its backbone services to multiple LSCs that are configured to use one as a primary and the other as a backup.
This is necessary to the maintenance of backbone functionality in the event there is a circuit (network path) failure, an MFSS or SS failure, or one of the sites housing an MFSS or SS is lost or the MFSS or SS becomes unavailable. Based on this, when establishing a call on the WAN, each LSC must be configured to signal with a backup MFSS or SS in the event it cannot reach its primary.
This is necessary to the maintenance of backbone functionality in the event there is a circuit (network path) failure, an MFSS or SS failure, or one of the sites housing an MFSS or SS is lost or the MFSS or SS becomes unavailable. Based on this, when establishing a call on the WAN, each LSC must be configured to signal with a backup MFSS or SS in the event it cannot reach its primary.
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