Phone system for a business with several offices or departments

A phone setup that works for one office starts to strain when you open a second, or when sales, support and billing each want their own line. Calls end up ringing the wrong people, every change has to go through the one person who manages the account, and nobody can tell which team spent what. This guide covers how to structure a phone system for several offices or departments so each one can run itself without losing the overall view.

Signs you have outgrown a single setup

• Callers for one office reach staff in another, who then have to transfer or take a message
• Every new hire, number or greeting change waits on one administrator
• Office managers cannot see their own team's calls without seeing everyone else's
• Phone usage arrives as one bill, and nobody knows which location drove the cost
• Different offices keep different hours, and the main greeting is wrong for some of them

Choose a structure: one layer is usually enough

Large phone systems let you build deep trees of regions, sites and sub teams. Most businesses do not need that. One layer of departments under one account covers the common cases: several offices, several functions, or a mix such as "Downtown office", "Airport office" and "Billing".

Start with the departments you actually have today. You can add another when the next office opens; it is much harder to untangle a structure that was built for a future that never came.

A main line for each department

Individual staff numbers are great for repeat customers who want to reach the same person. New callers, though, usually want "the office". That is the job of a department main line: one number per office or team, listed on the website and on the door, that rings a group of people.

All at once, or one by one

• All at once rings everyone in the group together, and the first person to pick up gets the call. Good for a front desk or a busy sales team where speed matters most.
• One by one rings people in an order you set, moving to the next if someone does not answer. Good when one person is the primary contact and others are backup.

Local or toll-free

A local number per office tells callers they are reaching someone nearby. A toll-free number suits a department that serves the whole country, such as central support or billing. Our guide to local vs toll-free numbers goes deeper.

Department admins: delegate the day to day

The single biggest improvement for a growing business is letting each office manage its own people. A good split of permissions looks like this:

This keeps spending decisions with the owner while the office manager handles the changes that happen every week: a new hire, someone on vacation, a new person on the front desk rotation. See roles and permissions for how roles work in general.

Separate budgets for each office

Plan minutes and texts are easiest to share across the whole account, because one office's quiet month balances another's busy one. The costs that vary a lot, such as international calls, minutes beyond the plan or AI features paid per minute, are where separate budgets help.

1. Give each department its own wallet. Usage from that department's numbers is paid from it, so you see what each office spends.
2. Fund it from the main account. The owner transfers money in, or sets an automatic top up so it never runs dry in the middle of a busy day.
3. Or let the department pay its own way. For franchises or offices with their own budgets, the department can put its own card on file for its seats and top ups.

Review spend per department once a month. A sudden jump usually has a simple cause, such as a new international client or a campaign, and it is better to spot it early.

Caller ID choices

What callers see when your team calls out matters as much as what they hear when they call in:

• The person's own number. Best for ongoing relationships. If the customer calls back, they reach the same person.
• The department main line. Best when any teammate may handle the callback.
• Hidden caller ID. Some roles need it, for example staff who call from personal devices or call people who should not see a direct number. Hidden calls are answered less often, so use it only where it is truly needed, and let an admin decide who may use it.

A rollout plan for a new office

1. Create the department and name it the way staff talk about it
2. Pick its main line, local or toll-free, and set its hours and greetings
3. Move or invite the people, and give each one a number and an extension
4. Make the office manager the department admin
5. Choose who the main line rings and in what order
6. Fund the department wallet and turn on automatic top up
7. Call the main line yourself during and after hours to test every path

If the office already has a number customers know, you can move it over instead of picking a new one. See our guide to porting a business phone number.

How departments work in CallRoute

Departments are included on both CallRoute plans. Each department has its own people, numbers, department admins and wallet, and can have one main line on top of your seats, at $5 a month for a local number or $8 for toll-free, paid from your main wallet. The main line rings the people its admin picks, all at once or one by one. Department admins see their own department's calls, inbox, voicemail and analytics, and the contact book stays shared across the business. Plan minutes and texts are pooled across the account, while usage beyond them and international calls come from the department's wallet.

Admins can forward a number to a teammate while its owner is away, and can allow hiding caller ID per person, with *67 to hide it on a single call. Workspaces that do not use departments work exactly as before. See roles and permissions, pricing, or start a free trial.