STIGQter STIGQter: STIG Summary: Enterprise Voice, Video, and Messaging Policy Security Requirements Guide Version: 1 Release: 4 Benchmark Date: 05 Jan 2026:

The Multifunction Soft Switch (MFSS) must be configured to synchronize with at minimum a paired MFSS and/or others so that each may serve as a backup for the other when signaling with its assigned Local Session Controller (LSC), thus improving the reliability and survivability of the DISN IPVS network.

DISA Rule

SV-259938r948785_rule

Vulnerability Number

V-259938

Group Title

SRG-VOIP-000580

Rule Version

SRG-VOIP-000580

Severity

CAT II

CCI(s)

Weight

10

Fix Recommendation

Ensure each MFSS is configured to synchronize with a paired MFSS so that each may serve as a backup for the other when signaling with its assigned LSCs and regarding the overall operation of the DISN IPVS network and the negotiation of call establishment between enclaves.

Check Contents

Inspect the configuration of the MFSS to determine compliance with the requirement.

If the event the MFSS is not configured to synchronize its LSC and associated traffic information with a paired MFSS and vice versa, this is a finding.

NOTE: There is a possibility that any given MFSS may pair with more than one other MFSS depending on the geographic orientation of the MFSSs and LSCs in the region.

Vulnerability Number

V-259938

Documentable

False

Rule Version

SRG-VOIP-000580

Severity Override Guidance

Inspect the configuration of the MFSS to determine compliance with the requirement.

If the event the MFSS is not configured to synchronize its LSC and associated traffic information with a paired MFSS and vice versa, this is a finding.

NOTE: There is a possibility that any given MFSS may pair with more than one other MFSS depending on the geographic orientation of the MFSSs and LSCs in the region.

Check Content Reference

M

Target Key

5585