E911 provisioned at turn-up. Not retrofitted after.
Every DID and trunk deployment leaves provisioning with a Registered Location on file. You get an update path you can actually find, and dispatchable-location detail where the rules demand it. Available in the 50 US states, from the FCC-licensed carrier that answers for 911 delivery directly.
What E911 actually is.
E911 (Enhanced 911) is the layer of 911 service that delivers your callback number and registered street address to the PSAP — the Public Safety Answering Point — that answers the call. On VoIP, that address is the Registered Location your carrier puts on file before turn-up.
Basic 911 just connects the call — the dispatcher has to ask where you are and hope you can answer. E911 puts the answer on screen before anyone speaks. Here is how the three generations compare.
| AT A GLANCE | BASIC 911 | E911 | NG911 |
|---|---|---|---|
| What the dispatcher gets | Nothing — they must ask | Callback number + registered address | The same, plus IP media like text |
| How the call routes | A dialing shortcut to a PSAP | On the Registered Location, via the ALI lookup | IP routing on the ESInet as states transition |
| What changes for you | Nothing to register | Keep your E911 address current | Nothing new — same Registered Location duties |
NG911 is the FCC-tracked, IP-based next generation of the 911 network — the FCC ordered transition steps in July 2024. It changes how 911 networks carry calls, not your side of the deal: keeping the Registered Location current stays the whole job.
911 handled like infrastructure, not paperwork.
Registered Location on every deployment
Every DID and trunk leaves provisioning with a physical service address on file. The FCC has required it of interconnected VoIP providers since 2005 — collected before go-live. No number goes live location-blind.
Available in the 50 US states
SIPNEX 911 services cover the 50 US states. One carrier, one provisioning process, whether your sites are in Texas, Maine, or Alaska.
A defined address update path
Office move, new site, agent going remote — each is a Registered Location update, and you know exactly where it happens. No digging through old tickets while 911 routes on a stale address.
Dispatchable-location guidance
Street address alone doesn't cut it in a 12-story building. We walk MLTS rollouts through adding suite, floor, and unit detail to meet the RAY BAUM'S Act standard.
Kari's Law turn-up checks
Our turn-up checklist covers the MLTS side. We confirm 911 and 9911 both complete from your dial plan, and point the on-site notification at a destination someone actually monitors.
The carrier answers for it directly
SIPNEX is the FCC-licensed carrier serving your interconnected VoIP traffic. The 911 delivery duties are ours directly — not diluted through a reseller chain nobody can pin down.
Four steps, all before your first call.
Collect the real address
At order, we collect the physical service address for every site and DID — where the endpoints sit, not where the invoices go. Multi-site rollouts register each site separately.
Add dispatchable detail
Suite, floor, and unit numbers go on the record for multi-floor and campus buildings. A responder then gets more than a street address and a lobby to stand in.
Provision and confirm
The Registered Location goes into the ALI (Automatic Location Identification) database the 911 network reads, before the deployment goes live. We confirm with you what is on file for each number — so you can verify it without a live 911 test call.
Update as you move
Relocations, new floors, remote agents — you send the change, we update the E911 address on file. The path is written down at turn-up, not made up during an emergency.
How an E911 call routes.
You dial 911
The call leaves your PBX or endpoint on a SIPNEX DID or trunk — no prefix, no special dialing, nothing to remember.
The network reads the ALI record
The 911 network looks up the Registered Location tied to your number and selects the PSAP that covers that address.
The dispatcher answers, informed
Your callback number and E911 address are already on screen when the call is picked up. Nobody has to ask where you are.
Three steps, one dependency — the address on file. The nomadic-use rules and the full mechanism live in our E911 for VoIP guide.
911 service at turn-up vs retrofitted later.
| AT STAKE | PROVISIONED AT TURN-UP | RETROFITTED LATER |
|---|---|---|
| Registered Location | On file before the first call | Collected after go-live, if ever |
| Multi-site addresses | One record per site | Headquarters address everywhere |
| Floor / suite detail | Provisioned with the deployment | Street address and a lobby |
| Dial plan (911 and 9911) | Verified at cutover | Assumed from the old install |
| On-site notification | Pointed at a monitored destination | Whatever the installer left |
| Address update path | Documented in your move runbook | Discovered during an emergency |
| Who answers for delivery | The FCC-licensed carrier, directly | A reseller chain, eventually |
Three regulatory layers, one turn-up.
The 2005 VoIP E911 order
Interconnected voice over Internet Protocol (VoIP) providers must deliver 911 calls with a callback number and the caller's Registered Location to the right PSAP. They must collect that address before go-live and give customers an easy way to update it. Customers cannot opt out of 911. These are the carrier-side duties SIPNEX carries — and provisions against at turn-up.
Kari's Law
Applies to multi-line telephone systems (MLTS) manufactured, imported, sold, leased, or installed after February 16, 2020. Users must be able to dial 911 with no prefix or access code. The system must also notify a front desk, security office, or designated contact when a 911 call is placed.
RAY BAUM'S Act §506
Requires dispatchable location information with every 911 call. That means the street address plus the apartment, suite, floor, or room a responder needs to find the caller. Deadlines have passed: January 6, 2021 for fixed MLTS devices, January 6, 2022 for non-fixed devices like softphones and remote endpoints.
The obligations legacy telephone services carried for decades now sit with interconnected VoIP. And this is only the summary. The full breakdown — nomadic use, who does what, and the eight-item deployment checklist — lives in our 911 requirements guide for VoIP.
Where emergency calling goes wrong without a plan.
PBX and MLTS operators
If you run a PBX behind SIP trunks, you wear two hats: the carrier's customer and the MLTS operator. Kari's Law dialing, notification, and per-device location are on your side of the line — our turn-up checklist covers them alongside the trunks themselves. See SIP trunking service.
Multi-site businesses
Every site needs its own Registered Location — a headquarters address covering twelve branches is the exact failure the rules target. Numbers for each site are provisioned with each site's address. See DID numbers.
Dialer operations with DID pools
Large caller-ID pools don't exempt the operation from 911. The trunk your agents dial from carries the duties. Each operating site gets its Registered Location on file at turn-up — separate from how the outbound pool is managed. See VICIdial carrier.
Life-safety lines leaving copper
Elevator phones, fire alarm panels, and security lines moving off POTS still have to reach emergency services with the right address. 911 provisioning is part of the replacement, not an afterthought to it. See POTS replacement.
Hospitals and multi-building campuses
Dispatchable location matters most where a street address is least useful — a campus with wings, floors, and outbuildings. Location detail is provisioned per building and floor, not per parking lot. See hospital phone systems.
About 911 provisioning with SIPNEX.
Where is SIPNEX E911 service available?
What address should I register for a SIP trunk?
How do I change my 911 address after turn-up?
Do outbound dialer DIDs need 911 provisioning?
Does enhanced 911 work for remote agents on softphones?
Can I place a test call to 911 to verify my setup?
Is 911 compliance my responsibility or my carrier's?
Is VoIP E911 the same as wireless E911 on a cell phone?
What is a PSAP and which one answers my 911 call?
Why is there an E911 fee line on a VoIP bill?
911 handled before the first call.
Tell us your sites, your platform, and how many numbers you're deploying. Emergency calling is provisioned with the deployment — Registered Location per site, dispatchable detail where it applies, update path written down. If the trunks aren't in place yet either, start with our SIP trunking service.