A 16-step checklist for setting up a business phone system or number

A business phone is a short project with a lot of small steps, and the steps that get skipped tend to surface months later: a number that will not port, a text that never arrives, a call that rings an empty office. Each item below is an action you can check off, with the person responsible, the timing and the usual reason it gets missed. It is general information and not legal advice, and it assumes a hosted (internet-based) system, though most items apply to any provider. If you want the planning side first, read choosing a business phone number. For the full porting process, see how to port a business phone number. Our business phone systems service covers setup for service companies.

1. Choose the number you will publish

Who: the owner. When: before you order anything. Decide which number goes on the trucks, invoices, website and Business Profile, and whether you will use a local or toll-free number. Google's Business Profile guidelines say to use a local phone number instead of a central call center helpline whenever possible. How it gets skipped: a company keeps its owner's cell as the main line because it is already printed everywhere, and ends up with no way to hand the phone to an office person or sell the number with the business.

2. List every number on the current account

Who: whoever pays the phone bill. When: before the port request. Pull the last bill and write down every line: the main number, the fax or alarm line nobody remembers, old advertising numbers still forwarding, and cell numbers on a business plan. Mark which ones move and which ones stay. How it gets skipped: the port covers the main line only, the old account closes, and a number printed on a six-year-old sign goes dead. Ask the old carrier what happens to lines you leave behind and whether the billing number has to change.

3. Collect the account details the port will need

Who: the account owner. When: a week before you submit. Get the account number as it appears on the bill, a port-out PIN or passcode, the account's authorized name and service address, and a recent bill. Ask the carrier for the customer service record if they will provide it. How it gets skipped: the form says "Smith Plumbing" and the account says "Smith Plumbing and Heating LLC," or the address is the shop and the account has the owner's home. Copy from the carrier's records letter for letter, not from memory. Our porting guide lists the common mismatches.

4. Open the new service before you end the old one

Who: the owner or office manager. When: before anything is cancelled. The FCC's porting guide says not to terminate service with your current company before starting service with the new one. Set up the new account, users and phones while the old line keeps ringing, and keep paying the old bill until the number has moved. How it gets skipped: someone calls the old carrier to cancel "because we're switching," and the number is released or the line goes dark before the port is accepted. The FCC also says that once you request service from a new company, the old one cannot refuse to port the number over an unpaid balance or termination fee, though you may still owe it.

5. Submit the port request and get the date in writing

Who: the new provider's porting team, with the account owner signing the authorization. When: after the new account is ready. The FCC says rules require simple ports, which generally involve no more than one line, to be processed in one business day, and that a port from a landline to a wireless service may take a few days. Ports with several lines or features can take longer. How it gets skipped: nobody asks for the date, the port lands on the busiest morning of the week, and the new routing is not built. Schedule it for a quiet day and tell staff what time to expect the switch.

6. Put a PIN on the account and store it where the company can find it

Who: the owner. When: at setup and again after the port. The FCC's warning about port-out hijacking says phone companies use a PIN or password to protect the account, and advises customers without one to ask their phone company about adding one. The same page notes that a determined thief can sometimes gather enough personal details to talk past those protections. How it gets skipped: the PIN lives in one employee's head, and it leaves with the employee. Put it in the company password manager, with the account owner's name recorded.

7. Register the 911 address for every location

Who: the office manager. When: before the first outbound call. The FCC's VoIP and 911 guide says VoIP customers may need to give their provider a physical location, and update it each time they change locations, for 911 service to work properly. How it gets skipped: the system is set up with the owner's home address, the office moves, and nobody updates the record. Treat a move, a new branch and a remote worker with a business desk phone as triggers to review the address.

8. Confirm 911 dialing and the alert on a multi-line system

Who: the installer or provider, with the owner signing off. When: at installation and after any change to the system. Federal rules in 47 CFR 9.16 say that installers, managers and operators of a multi-line telephone system may not configure it so that callers must dial a prefix such as 9 to reach 911, and that where it can be done without hardware or software changes, a notification of the 911 call must go to a place where someone is likely to see or hear it. Ask your provider in writing how your system meets both points. Do not place a live test call to 911 without first asking the provider how to verify the setup. How it gets skipped: assuming the provider handled it.

9. Set business hours, including holidays

Who: the owner. When: before go-live. Enter the hours the phones are staffed, save separate schedules for the holidays you close, and decide who changes them. Match the hours on the phone system to those on your Business Profile and website, since a caller who finds the office "open" online and hits voicemail hears a broken promise. How it gets skipped: hours are entered once, a holiday arrives, and the greeting still says to press 1 for the office. Put holiday schedule changes on the same calendar as your payroll dates.

10. Build the ring order for each situation

Who: the owner with the person who answers calls. When: before go-live. Decide who rings first, for how many seconds, who rings next, and where the call lands when nobody answers. A common order is the office phone and an owner app together for twenty seconds, then the crew lead, then an AI receptionist or voicemail. How it gets skipped: every call rings every phone for a minute, then drops to a voicemail box nobody reads. Write the routing on a one-page sheet and tape it by the front desk. Our AI receptionist can take the calls nobody picks up, and you should still decide what it does with emergencies.

11. Decide the after-hours path for emergencies and routine calls

Who: the owner. When: before go-live. Choose what happens at 10 p.m. when a pipe bursts and what happens when someone wants a quote for a deck. Emergencies might ring an on-call phone; routine calls might get a short greeting and a text-back. Say what the caller should expect and when. How it gets skipped: the on-call phone is a personal cell, the tech who carries it changes, and nobody updates the forwarding. Name the on-call person in the system and review the rota at every schedule change. Pair this with missed-call text back so unanswered calls still get a reply.

12. Record the greeting and decide who owns the voicemail box

Who: the owner or office manager. When: before go-live. Record a short greeting that gives the business name, what to do next and a time to expect a call back. Assign every voicemail box to a named person, and send transcripts or audio to a shared email address so a sick day does not block messages. How it gets skipped: the default carrier greeting is left on, with a robotic number read back, and boxes fill up unheard. Re-record when hours or staff change, and listen to it yourself once a month.

13. Add a recording notice before you turn recording on

Who: the owner, with a lawyer if recordings are stored. When: before recording, call summaries or AI transcription are enabled. Recording laws differ by state, and some states require every party's consent. Many companies open recorded calls with a brief notice, such as "This call may be recorded." Our guide on recording business calls explains the structure of the rules. How it gets skipped: recording is a default setting in the new system, and nobody realized it was on. Check the settings page, then check where recordings are stored and who can open them.

14. Register the number for business texting

Who: the office manager or the provider. When: as soon as the number is yours, because approval takes time. Twilio's documentation says anyone sending text messages from an application over a local 10-digit number to US recipients must register for A2P 10DLC, and that its toll-free numbers cannot send texts to the US and Canada until toll-free verification is complete. Other providers set their own rules, so ask yours. Read our 10DLC guide for what carriers ask for, and the SMS rules guide for consent. How it gets skipped: texts are turned on at go-live and quietly fail to deliver.

15. Update every place the number appears

Who: the office manager. When: on port day. Change the number on the website header and footer, the Business Profile, directory listings, social profiles, email signatures, invoices, estimate templates, the truck lettering that can be changed and the voicemail on any other line. Make a list and cross items off. How it gets skipped: the website is updated and the Business Profile is not, so two different numbers show in search. If you are using call tracking numbers, keep your main number as the primary one on the listing; see how to set up call tracking.

16. Test every path from an outside phone, then plan for an outage

Who: two people, one calling and one answering. When: on port day and after any change. Call the main number from a cell phone that is not on the system during hours, after hours, on a holiday schedule and when the first person does not answer. Check the caller ID on outbound calls. Send and receive a text. Leave a voicemail and confirm the transcript arrives. The FCC notes that VoIP service may not work during a power outage or when the internet fails, so set a forwarding rule to a cell phone for that case and test that too. How it gets skipped: nobody tests the failure paths.

Where to start

If you are moving an existing number, three items decide whether the project goes smoothly:

1. Items 2 and 3, the inventory and the account details. They prevent most rejected ports.
2. Item 7, the 911 address. It takes ten minutes and matters most when something goes wrong.
3. Items 10 and 11, routing and the after-hours path. They decide whether calls reach a person or a voicemail nobody reads.

Then work through the rest in order. If you would rather have the setup, port and testing done for you, that is what our phone systems service is for.

Frequently asked questions