---
title: "NIST 800-171 3.13.14 (SC.L2-3.13.14): Voice over IP"
description: "NIST SP 800-171 3.13.14 Voice over IP: 1 SPRS point, allowed on a CMMC POA&M. The text, what assessors check and the evidence."
url: https://policycortex.com/nist-800-171/system-and-communications-protection/3.13.14
sealed: 2026-11-11
amended: 2026-11-11
register: nist-800-171/system-and-communications-protection/3.13.14
records: 7
digest: sha3:1e99e89d54a801cd0c63119825e1d46e1324062e20c0dad886f2b682192d5754
---

# NIST 800-171 3.13.14 (SC.L2-3.13.14): Voice over IP

NIST 800-171 / System and Communications Protection / 3.13.14

"Control and monitor the use of Voice over Internet Protocol (VoIP) technologies." ([NIST SP 800-171 Rev. 2, requirement 3.13.14](https://doi.org/10.6028/NIST.SP.800-171r2))

CMMC Level 2 practice SC.L2-3.13.14.

## What 3.13.14 means in practice

Internet telephony is controlled and monitored like any other network service: only approved phones and soft clients, configuration under change control, call systems patched, and their logs reviewed. That includes the calling features of collaboration suites, not only desk phones.

## SPRS points and the CMMC POA&M

- **CMMC Level 2 practice**: SC.L2-3.13.14
- **SPRS points**: 1 point. When it is not met, the DoD Assessment Methodology subtracts 1 from the score of 110.
- **CMMC POA&M**: Allowed. It is worth 1 point, and 32 CFR 170.21(a)(2)(ii) admits requirements worth 1 point. Conditional status also needs a score of at least 88, and the item must be closed within 180 days.

Sources: [NIST SP 800-171 DoD Assessment Methodology, version 1.2.1 (June 24, 2020), Annex A](https://www.acq.osd.mil/asda/dpc/cp/cyber/docs/safeguarding/NIST-SP-800-171-Assessment-Methodology-Version-1.2.1-6.24.2020.pdf); [32 CFR 170.21, Plan of Action and Milestones requirements](https://www.ecfr.gov/current/title-32/section-170.21).

## What an assessor checks for 3.13.14

NIST SP 800-171A gives 2 determination statements for 3.13.14, each found satisfied or other than satisfied. Determine if:

- 3.13.14[a] use of Voice over Internet Protocol (VoIP) technologies is controlled.
- 3.13.14[b] use of Voice over Internet Protocol (VoIP) technologies is monitored.

[NIST SP 800-171A (June 2018), assessment objectives for 3.13.14](https://doi.org/10.6028/NIST.SP.800-171A)

## Evidence that shows 3.13.14 is met

- The VoIP usage policy and the approved systems.
- VoIP system configuration and access controls.
- VoIP logs and the monitoring that reviews them.

## How PolicyCortex gathers the evidence

No PolicyCortex collector reads the evidence for 3.13.14. Your team provides the evidence listed above.

## Related pages

- **Calculator**: [SPRS score calculator: mark 3.13.14 and the other 109 requirements and see the score.](https://policycortex.com/sprs-score-calculator#family-SC)
- **Sample package**: [Sample package: an SSP, a POA&M and an evidence chain the product generated from demonstration data.](https://policycortex.com/sample-package)
- **Family**: [All 16 System and Communications Protection requirements (3.13).](https://policycortex.com/nist-800-171/system-and-communications-protection)
- **Previous**: [3.13.13: Mobile Code](https://policycortex.com/nist-800-171/system-and-communications-protection/3.13.13)
- **Next**: [3.13.15: Session Authenticity](https://policycortex.com/nist-800-171/system-and-communications-protection/3.13.15)
- **All requirements**: [All 110 NIST SP 800-171 requirements, by family.](https://policycortex.com/nist-800-171)

Meet the requirement once. Keep the evidence current. [Request Access](https://app.policycortex.com/auth?mode=request-access) · [Book a call](https://policycortex.com/book)

## Register colophon

| Seq | Label | SHA3-256 | Prev |
|---|---|---|---|
| REC 0000 | REQUIREMENT | 89593a6e7df6 | e088d66e6503 |
| REC 0001 | MEANING | 80638ccd14a3 | 89593a6e7df6 |
| REC 0002 | POINTS AND POA&M | 85d0fe507384 | 80638ccd14a3 |
| REC 0003 | ASSESSMENT OBJECTIVES | a15cca5d1bf7 | 85d0fe507384 |
| REC 0004 | EVIDENCE | 1af0ea0fd7b2 | a15cca5d1bf7 |
| REC 0005 | COLLECTORS | 2844964589fa | 1af0ea0fd7b2 |
| REC 0006 | RELATED | 1e99e89d54a8 | 2844964589fa |

Head sha3:1e99e89d54a801cd0c63119825e1d46e1324062e20c0dad886f2b682192d5754. Each digest is SHA3-256 over the previous digest, the register key, the record label, and the record copy; a second party can recompute it from this document.