Guide911 basicsReviewed October 3, 2026
E911 for Business: A Compliance Guide by SPARK VoIP
Enhanced 911 is what puts a callback number and a location on a dispatcher’s screen. How it works on a hosted phone system, and where schools and offices get it wrong.
Fig. 1What E911 sends
- PhoneExtension 2114
- Callback number(555) 010-0114
- Location400 Oak St, Room 114
- DispatchWho and where, as the call arrives.
REFAt a glance
The short version, in five lines.
- What it is
- A callback number and a location, sent with every 911 call
- Applies to
- Every phone and app on a multi-line system that can dial 911
- The rules
- Kari’s Law (2020) and RAY BAUM’S Act (2021 and 2022)
- Enforced by
- The FCC
- Test it
- Dial 933, never 911
TL;DRThe short answer
If you read one paragraph, read this.
E911, or Enhanced 911, sends two things with a 911 call: a number dispatch can call back, and the caller’s location. On a hosted phone system, both come from records: the number and location tied to each phone. If those records are wrong, dispatch gets the wrong answer, however good the phones are.
§Basic and enhanced
How E911 Technology Identifies Your Location with SPARK VoIP
With basic 911, the call reaches a dispatcher and the caller has to explain everything. With E911, the dispatcher sees a callback number and a location as the call arrives. That matters most when the caller cannot talk, is a child, or does not know the address.
| What dispatch gets | Basic 911 | Enhanced 911 (E911) |
|---|---|---|
| A dispatcher on the line | Yes | Yes |
| A number to call back | No | Yes, on screen as the call arrives |
| Where the caller is | Only what the caller can say | Yes, from the phone’s location record |
| If the caller cannot speak | Nothing to go on | Who and where, already on screen |
§On a hosted system
Location is a record, not a wire.
An old phone line had an address tied to the copper. A hosted phone system can place a call from anywhere, so the location has to come from what the system knows about each phone.
Callback number. The number dispatch sees and can call back. On a multi-building system it should reach the building the call came from, not just the main office.
Location. The address and room tied to that phone, sent with the call.
Records. Both are set up during the install and need updating when phones or people move.
- StopPhoneExt 2114 dials 911, no prefix
- StopYour phone systemAttaches the callback number and the room
- StopCarrierRoutes the call to the 911 center for that address
- Stop911 centerReceives the call with its callback number and location
- StopDispatcher’s screenWho and where, as the call arrives
Front office notifiedAt the same moment, someone on site is told a 911 call was made (Kari’s Law).
Sample. Fictional school and numbers.
| Phone | Callback number | Location sent to dispatch |
|---|---|---|
| Ext 2114, classroom | (555) 010-0114 | 400 Oak St, Building A, Room 114 |
| Ext 2301, gym | (555) 010-0301 | 400 Oak St, Building B, Gym |
| Ext 2100, front office | (555) 010-0100 | 400 Oak St, Building A, Main office |
Sample. Fictional school, numbers and addresses.
§Where it goes wrong
Three ways a 911 call sends the wrong answer.
One address for everything. Every phone sends the main office address, so responders go to the wrong building.
A 9 in front. Callers have to dial an outside line first. Under Kari’s Law, 911 alone must work.
Nobody told. Dispatch knows about the call, but the front office does not, so nobody meets responders at the door.
| Mistake | What happens | The fix |
|---|---|---|
| One address for everything | Every phone sends the main office address | A location record per building, floor or room |
| A 9 in front | Dialing 911 alone does not connect | Direct 911 dialing, no prefix |
| Nobody told | Nobody on site meets responders at the door | On-site notification when 911 is dialed |
§The rules behind it
Two federal rules set the bar for multi-line systems.
Kari’s Law requires direct 911 dialing and notification on site. RAY BAUM’S Act requires a dispatchable location: the street address plus the room or floor. Both apply to the kind of system schools and offices run.
§Timeline
When the rules took effect.
February 16, 2020
Kari’s Law
Direct 911 dialing and on-site notification, for systems made, sold, leased or installed after this date.
January 6, 2021
RAY BAUM’S Act: fixed phones
Desk phones on a multi-line system send a dispatchable location automatically: street address plus room or floor.
January 6, 2022
RAY BAUM’S Act: phones that move
Phones and apps that move, on site and off, send location information with the call.
§How SPARK sets it up
Per building, per phone, in writing.
We set the callback number and location for each building during the install, configure direct dialing and notification, and put what the system does in writing. We will not tell you a phone system makes you compliant. That depends on your records being right and staying right.
Building A · 400 Oak St
Main office
(555) 010-0100 · 400 Oak St, Building A, Main office
Room 114
(555) 010-0114 · 400 Oak St, Building A, Room 114
Room 116
(555) 010-0116 · 400 Oak St, Building A, Room 116
Nurse
(555) 010-0120 · 400 Oak St, Building A, Nurse’s office
Building B · 400 Oak St
Gym
(555) 010-0301 · 400 Oak St, Building B, Gym
Coach’s office
(555) 010-0302 · 400 Oak St, Building B, Coach’s office
Sample. Fictional school, numbers and addresses. Tap a room to see what its phone sends to dispatch.
§Checklist
Seven questions to ask about your system.
If any answer is no or not sure, that is the first thing to fix. We can check it with you on a call.
§Test it
Test with 933, never with 911.
933 is a test line. It reads back the address and callback number your phone would send to dispatch, without reaching a 911 center. Do it from a phone in each building once a quarter.
ProcedureTest with 933, never with 911.
- Dial933 from the phone you want to check
- ListenFor the address and callback number it reads back
- CompareAgainst the building and room the phone is actually in
- FixTell us anything that is wrong, then test again
§Questions
What people ask before they call.
What happens if we move a phone to another room?
Its location record needs to move with it, so the next 911 call sends the right room. Tell us when phones move.
Can we test 911?
Yes, without calling 911. Dial 933 instead. It is a test line that reads back the address and callback number your phone would send to dispatch, without reaching a 911 center. We advise doing it once a quarter, because phones get moved and things change that nobody tells us about.
Is E911 the same as Kari's Law?
No. E911 is what sends the callback number and location. Kari’s Law and RAY BAUM’S Act are the federal rules that say what a multi-line system must do.
§Who it matters to
Where the 911 details carry the most weight.
K-12 Education Classrooms, gyms and portables, each with its own location.
Medical, Dental and Vet Patients and staff spread across rooms and floors.
Multi-Location Retail Every store sends its own address, not head office.
§Sources
Where this comes from.
- FCC: VoIP and 911 service
- FCC: multi-line telephone systems and 911
- FCC rules for multi-line systems: 47 CFR § 9.16
- Federal Register, December 5, 2019: the FCC’s Kari’s Law and RAY BAUM’S Act rules
This guide explains the rules in plain language. It is not legal advice.
Last reviewed October 3, 2026.
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