Switching without missing a call.
The plan, the paperwork to gather and what your callers will notice on the night the numbers move.
Moving your numbers, week by week.
A typical move for up to a hundred numbers. Larger moves follow the same steps over a longer plan, and no calls are missed during cutover.
Week 1
Plan
Done when Routing plan signed off
- Tizbo
- List every number and call flow you have today, then draw up the new routing together.
- Your team
- Send a recent phone bill and sign the porting authorization.
Week 2
Build and test
Done when Every route test-called
- Tizbo
- Set up queues, hours and the AI receptionist on temporary numbers you can call.
- Your team
- Install the apps and test-call every route.
Cutover night
Move the numbers
Done when All numbers ring on Tizbo
- Tizbo
- Move numbers in a window you choose, usually overnight, and watch every route as calls arrive.
- Your team
- Nothing. Desk phones and apps switch over on their own.
First month
Tune
Done when Routing reviewed together
- Tizbo
- Review call data with you and adjust routing, hours and greetings.
- Your team
- Tell us what callers keep asking for.
What to gather
Most rejected ports come from mismatched details. Collect these from a recent bill first.
- The account holder name exactly as the old provider prints it on the bill.
- The service address on file, which may differ from your office address.
- The account number and any PIN set for porting.
- Every number on the account, including fax, alarm and old direct lines.
- Which numbers are part of a bundle that cancelling would remove.
- Someone with authority over the account to sign the letter of authorization.
Cutover night
You choose the window, usually overnight, when call volume is lowest.
- Before
- Every route has been test-called on temporary numbers, and you have a rollback plan and a named person on each side.
- During
- Numbers move in the window you chose, usually overnight. A caller may hear a short delay or a busy tone. Calling again works.
- After
- You call each number from a mobile and a landline, check inbound calls, outbound calls and faxes, then watch the first day of real calls.
Read next
Posts on the parts of the move teams most often ask about.
- Moving your business numbers to a new provider without missing calls
Porting is paperwork followed by a short cutover. Gather the right details, pick a quiet window, and test before anyone notices a change.
- Auto attendant menus callers do not hate
Most menu complaints trace back to depth, vague wording and stale schedules. Here is how to build one that gets people where they are going.
- Ring groups vs hunt groups: choosing how calls ring a team
Names vary by vendor, but the choice is the same: ring everyone at once, ring people in order, or spread the calls out. Here is how to pick.
Questions about switching.
Not answered here? Send us the question and we will answer it for your own setup.
Contact usCan we keep our current phone numbers?
Yes. We move your existing numbers and you choose the cutover window, so no calls are missed.
Do we need new desk phones?
No. Tizbo works with most desk phones you already own, plus the desktop app, the mobile apps and any modern browser.
Should we cancel our old service first?
No. Cancelling before the port completes can release the numbers. Let the port finish, then deal with the contract.
What is a letter of authorization?
A signed statement that you own the numbers and allow the new provider to move them. Its details must match the records at your old provider.
Talk to the team that will set it up.
Bring your current call flows and we will walk through them using your own numbers.