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VoIP Phone Services

Voice over IP, or VoIP for short is the transmission of voice traffic via an internet connection. The traditional telephony known as PSTN works through physical phone lines and cable systems with landlines while offering users to make both cellular telephone calls as well data-enabled conversations on their laptops; tablets etc at much lower costs than ever before!

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VoIP Phone Services for Business

In today’s business world, staying connected is more important than ever. That’s why smart businesses rely on dependable VoIP phone services to support their communications needs. By using an Internet connection to make and receive calls, VoIP provides a cost-effective way to stay in touch with customers, employees, and partners.

VoIP also offers a host of features that can help businesses boost productivity, such as caller ID, call forwarding, and voicemail. Best of all, VoIP phone services are scalable, so businesses can easily add or remove lines as their needs change. Whether you’re a small business just getting started or a large enterprise with complex communications needs, VoIP is the smart choice for business-grade phone service.

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Advantages of a Cloud Phone System

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No On-Premise Phone System

Save money by removing the upfront purchase and maintenance of an on-premise phone system.  Nowadays, Cloud phone systems are the smarter choice


Always Connected

If your network goes down due to power or internet problems, your phone system keeps you connected.


High Flexibility

Cloud Phone systems are easily adjusted, reduce the dependancy and delays in having your phone provider respond and make configuration changes.

Leading VoIP Vendors for Business

The vendors we use to build smart VoIP Phone Systems that are used and actively endorsed by Interwise IT

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Microsoft Teams

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How does Business VoIP Work

Voice Over IP (VoIP) converts data, such as voice or video into digital signals and transfers them across the internet using packets. To use this technology you need an application that facilitates calls & internet access for your specific provider–most broadband providers offer voiP services alongside traditional PSTN service but some telco companies have made gradual switches to all-IP systems instead!

Benefits of Business VoIP Systems

Bills Save

Save on Telco Bills

VoIP calls are much cheaper than traditional copper-service phone services

Cost Save

Save on Phone System Maintenance

Most VoIP Systems nowadays are cloud based, this makes it easier to manage and deploy changes to your phone system and the savings are passed on to you


Work From Home / Remote

SoftPhones and the ability to roam while connected to the company phone system is made possible with cloud based Business VoIP Systems



Most VoIP Services are offered as a cloud service or managed service and so there is development time included in the service to improve the functionality of the VoIP Service to remain relevant and competitive in the market.

Our VoIP Services include

Single Support Contact

Interwise IT provides a signle point of contact for Business IT Support and Business Phone Support

Tailored to your Business

Each phone system is customised to the requirements of your business


Improve your Communications with integrated voice, video & chat

What is a PBX phone system?

It is important to stay connected in today’s business world, which is why smart businesses use dependable VoIP phone services. VoIP uses an Internet connection to make and receive calls, which is a cost-effective way to stay in touch with customers, employees, and partners.


Popular VoIP Terminology & Definitions

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VoIP (Voice over Internet Protocol)

VoIP is also called IP Phone System, IP Telephony, Internet telephony, and Digital Phone)
The routing of voice conversations over the Internet or any other IP-based network.

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SIP (Session Initiation Protocol)

SIP is a protocol developed by the IETF MMUSIC Working Group and proposed standard for initiating, modifying, and terminating an interactive user session that involves multimedia elements such as video, voice, instant messaging, online games, and virtual reality.



Public Switched Telephone Network – is the concentration of the world’s public circuit-switched telephone networks, in much the same way that the Internet is the concentration of the world’s public IP-based packet-switched networks.

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ISDN (Integrated Services Digital Network)

A type of circuit switched telephone network system, designed to allow digital (as opposed to analog) transmission of voice and data over ordinary telephone copper wires, resulting in better quality and higher speeds, than available with analog systems.


PBX (Private Branch/Business eXchange)

A telephone exchange that is owned by a private business, as opposed to one owned by a common carrier or by a telephone company.


IVR (Interactive Voice Response)

A computerised system that allows a person, typically a telephone caller, to select an option from a voice menu and otherwise interface with a computer system.

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DID (Direct Inward Dialing)

A feature offered by telephone companies for use with their customers’ PBX system, whereby the telephone company (telco) allocates a range of numbers all connected to their customer’s PBX.


RFC (Request for Comments)

One of a series of numbered Internet informational documents and standards very widely followed by both commercial software and freeware in the Internet and Unix communities.

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