---
title: "What are the CALEA requirements when an ISP adds business voice?"
topic: "Compliance & Legal"
updated: 2026-07-09
canonical: https://acrobits.net/resources/knowledge-base/calea-requirements-isp-business-voice/
summary: "Yes. Once you offer interconnected VoIP (service that can call or receive calls from the public telephone network), you are subject to CALEA, the Communications Assistance for Law Enforcement Act. It requires you to maintain lawful intercept capability, file a System Security and Integrity (SSI) plan with the FCC, designate a 24/7 point of contact, and contribute to the Universal Service Fund. Adding hosted PBX or UCaaS to a broadband product almost always crosses that threshold."
---

# What are the CALEA requirements when an ISP adds business voice?

> Yes. Once you offer interconnected VoIP (service that can call or receive calls from the public telephone network), you are subject to CALEA, the Communications Assistance for Law Enforcement Act. It requires you to maintain lawful intercept capability, file a System Security and Integrity (SSI) plan with the FCC, designate a 24/7 point of contact, and contribute to the Universal Service Fund. Adding hosted PBX or UCaaS to a broadband product almost always crosses that threshold.

Yes. Once you offer **interconnected VoIP** (service that can call or receive calls from the public telephone network), you are subject to [CALEA](/voip-glossary/calea/), the Communications Assistance for Law Enforcement Act. It requires you to maintain lawful intercept capability, file a System Security and Integrity (SSI) plan with the FCC, designate a 24/7 point of contact, and contribute to the Universal Service Fund. Adding hosted PBX or UCaaS to a broadband product almost always crosses that threshold.

## When does CALEA apply to business voice?

The FCC's 2005 order extended CALEA to interconnected VoIP and broadband internet access providers. The trigger is **PSTN interconnection**. Can a subscriber dial a regular phone number, or receive a call from one? If yes, you are an interconnected VoIP provider and CALEA applies.

  - **Not covered:** App-to-app-only services that never touch the PSTN (e.g., a closed in-network push-to-talk tool).

  - **Covered:** Any hosted PBX, UCaaS, or SIP trunk service where subscribers can reach or be reached from the PSTN.

  - **Pure reseller grey area:** If you resell a licensed carrier's trunks without providing service directly to end users, your CALEA obligation may rest with the underlying carrier. Confirm in writing before assuming you are exempt.

FCC obligations are not typically scaled by company size. A small fiber ISP rolling out hosted PBX can face the same CALEA requirements as a national carrier.

## What CALEA requires

  - **Lawful intercept capability.** You must be technically capable of isolating and delivering the content of communications and call-identifying information to law enforcement under a valid court order. This capability must exist before you begin offering the service.

  - **System Security and Integrity (SSI) plan.** File an SSI plan with the FCC (Electronic Comment Filing System, docket 04-295). The SSI plan documents how your network protects the confidentiality of lawful intercepts and how you prevent unauthorized access to intercept capability.

  - **CALEA point of contact.** Designate and register a CALEA point of contact, a named individual law enforcement agencies can reach 24/7 to serve process and coordinate intercepts.

  - **USAC contributions.** Interconnected VoIP providers must contribute to the Universal Service Fund (USF). CALEA compliance and USF contribution come together as part of operating as an interconnected VoIP provider under FCC jurisdiction.

## How operators usually meet CALEA

Many small and mid-size ISPs and VoIP operators do not build intercept capability in-house. A common approach is to contract with a **Trusted Third Party (TTP)**, a specialized intermediary that maintains intercept infrastructure and fulfills court orders on your behalf.

Common TTPs in the US market:

  - **Subsentio** is used by regional carriers and ISPs; it handles SSI plan filing assistance, intercept delivery, and POC services.

  - **Yaana Technologies**, a cloud-based lawful intercept platform that integrates with softswitch and IMS environments.

  - **NeuStar / TransUnion** provides CALEA mediation for carriers with existing number intelligence infrastructure.

Using a TTP does not eliminate your regulatory responsibility. You remain the provider of record. It can move the technical complexity and 24/7 operational burden to a specialist, which is often a practical trade-off for operators under a few thousand lines.

## How CALEA fits with E911 and STIR/SHAKEN

CALEA is one of the main regulatory obligations that can attach when an ISP adds business voice. The others:

  - **E911.** Route emergency calls to the correct PSAP with location. Covered in detail in [E911 Requirements for ISPs Adding Voice](/resources/knowledge-base/e911-legal-isp-voice/).

  - **STIR/SHAKEN.** Caller ID authentication to combat robocalling. Your trunk provider handles signing; you choose who that trunk provider is. See [STIR/SHAKEN Obligations for White-Label Operators](/resources/knowledge-base/stir-shaken-white-label/).

These obligations generally begin when you cross from broadband-only to interconnected VoIP. Treat all three as one compliance workstream that must be in place before you [launch your UCaaS product](/blog/cloud-softphone/launch-ucaas-product/).

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