Guide for small businesses
Small business phone systems — how to choose
A modern phone system gives your business an auto attendant, queues, extensions and a professional image — without expensive hardware. Here is how the options differ and how to choose the right one.
What is a business phone system?
A business phone system (PBX) ties the company’s numbers, extensions and features into one system. It routes incoming calls to the right person or team, greets callers with an auto attendant, handles queues and voicemail, and lets everyone call out on the company number. It used to be a box of hardware in the office — today it is usually software running over the internet (VoIP), either in the cloud or as your own PBX connected with a SIP trunk.
Three ways to run business telephony
Most small businesses choose a cloud PBX for the simplicity. Here is how they compare:
Features that make a difference
How to choose the right one
Start from four questions: how many need to call and answer at the same time (number of channels)? Do you work in one office or remotely (a cloud solution wins there)? Do you already run your own PBX such as 3CX (then a SIP trunk fits)? And which features do you need — auto attendant, queues, analytics? For most small businesses a cloud PBX is fastest to get going, while a SIP trunk is right when you want to own and control the system yourself.
Telephony for your business — from Internetport
We deliver cloud PBX, SIP trunk (3CX-compatible) and Teams telephony with Swedish support and a Swedish data center. Keep your numbers and pay only for what you need.
Curious how calling over the internet works? Read our guide to IP telephony & VoIP.
Common questions about business phone systems
What is a business phone system (PBX)?
A PBX (Private Branch Exchange), or switchboard, is the system that ties a company’s phone numbers, extensions and features together. It routes incoming calls to the right person or team, provides voicemail, queues and an auto attendant, and lets staff call out on the company number. Modern systems are software over the internet (VoIP), so no bulky hardware is required.
On-premise, cloud PBX or SIP trunk — which should a small business pick?
For most small businesses a cloud PBX (hosted switchboard) is the simplest: low upfront cost, nothing to maintain and easy to scale. If you already run your own phone system such as 3CX, a SIP trunk connects it to the phone network with your numbers and several channels. An on-premise PBX with its own hardware mainly suits fixed offices with specific requirements.
Can we keep our existing company numbers?
Yes. Existing landline and mobile numbers can almost always be ported to the new system, so you keep the same numbers your customers already know when you switch to a modern VoIP-based phone system.
How many channels or lines do we need?
Channels decide how many calls can happen at the same time, not how many numbers or staff you have. A rule of thumb is roughly one channel per 3–4 employees who are on the phone regularly; a small office often manages well with a handful of channels and can add more as it grows.
Does it work for remote and hybrid teams?
Yes — that is a key strength. Because the system runs over the internet, staff answer and make company calls from a mobile or desktop app anywhere, and calls can ring several devices at once. Everyone shares the same switchboard, queues and numbers whether they sit at the office or at home.