Bring your phone system
into the 21st Century
with simple, smart,
business calling.

Complete Phone System

Get ahead of the copper network withdrawal and replace your aging phone system with a modern & easily to use VoIP system.

SIP Trunks

From 1 line to 100+, order custom SIP Trunks with or without calling plans to suit your business needs.

0800 numbers & DDI's

Toll free numbers and individual landline numbers. Bring your number to Xtreme or we can supply on request.


complete flexibility to grow with your business.

Cost Effective

cost effective with no frills.


dual carrier paths for resiliency so your customers can always reach you.

A complete business phone solution

Are you facing the extinction of your existing copper phone lines?

Are you needing to replace your aging PBX with a modern system?

Xtreme Networks can provide a complete business phone solution, from phone lines and calling plans, through to setup and management of your call flows and any physical desk hardware requirements.


Starting from $29.95 per user per month

for phones that just work.

Quality Audio

Say goodbye to poor sound quality and dropped calls.

Reliable network

Diverse upstream links for reliability and redundancy

Affordable calling

Bundled rates or pay as you go.

With unlimited outbound calling to nz landlines as standard.

Work collaboratively

Work seamlessly with your team across multiple offices and locations, powered by the same backbone.

Voicemail to Email

If you like checking your voicemail, great! If not, we’ll email the recording to you and keep that pesky message bank clear.


Our SIP Trunks are hosted in a well secured network with anti-fraud protections in place for additional security.

SIP trunks & individual VoIP phone lines

How many phone calls does your business need to be able to take at any one moment?

Xtreme Networks can deploy single phone lines or as many available lines as your business needs. With or without a calling plan.


"For most businesses, 1 phone line for every 4 staff members is a great ratio. So if you have 12 staff, let's start with 4 lines"
Cat Dearlove
Account manager


A modern phone system sends your calls over the internet, rather than the copper phone lines of days gone by.

Xtreme Networks voice solutions for businesses, provides a reliable, secure and flexible way for you to communicate with your colleagues and customers.