SIP Voice & PBX Hosting

Carrier-grade SIP trunks on Tier 1 Australian networks, connected to Microsoft Teams, Zoom Phone, Webex and your desk phones, with a hosted phone system run by our engineers around the clock.

Works with
  • Microsoft Teams
  • Zoom Phone
  • Webex
  • Genesys Cloud
  • 3CX
  • Asterisk
  • FreePBX
  • Kamailio
  • Yeastar
  • Cisco
  • Poly
  • Yealink
  • Grandstream
  • Snom
  • Fanvil
  • Linphone
  • Zoiper
  • WebRTC

Every call on a carrier-grade network, answered wherever your people work.

NGN delivers business voice over Tier 1 Australian carrier networks. Your SIP trunks run on our carrier-grade voice network, your numbers are hosted and ported there, and concurrent call capacity scales with your business without new lines or site visits.

Those trunks connect to whatever your people already answer on: Microsoft Teams through Direct Routing, Zoom Phone through Bring Your Own Carrier, Webex Calling, Genesys Cloud, 3CX and standards-based PBXs. One carrier and one set of numbers, on every platform.

Prefer a phone system that is looked after for you? The NGN Hosted PBX runs on our own voice platform: IVR menus, ring groups, call centre queues, voicemail to email, call recording and desk handsets that configure themselves. Our engineers have managed VoIP for more than 2,000 PBX clients, and the same team runs your network and IT support. Already invested in FreePBX, 3CX or another platform? We build around it.

Why NGN for business voice

  • Tier 1 carrier underneath: SIP trunks and numbers on Tier 1 Australian carrier networks
  • One carrier for every platform: Teams, Zoom Phone, Webex, Genesys, 3CX and desk phones
  • A voice core that reaches the carrier over more than one path, so calls route around a failure
  • NGN Hosted PBX with the full feature set, and your configuration exportable at any time
  • Fraud controls on from day one, with international dialling enabled only where you need it
  • Engineers on call 24/7, the same team that runs your network and IT
What We Deliver

Voice, from carrier to handset

Trunks, numbers, cloud calling and a hosted phone system, designed together and supported by one team.

Tier 1 SIP Trunks

Business SIP trunks on our carrier-grade voice network, over Tier 1 Australian carrier networks, delivered over your data link or the internet. Concurrent call capacity is sized to your peak and scaled up or down as you grow, with no new lines to install.

Numbers & Porting

Keep the numbers your customers know. Geographic numbers and ranges, plus 13, 1300 and 1800 inbound numbers, ported in and pointed wherever you like, with new numbers in any state when you open a new office.

Multihomed & Resilient

Our voice network reaches carrier interconnects over more than one path, so a single link or site failure is routed around. If your office goes offline, calls divert to mobiles, another site or voicemail automatically.

Microsoft Teams Calling

Teams Phone users make and take calls on your own numbers through Direct Routing over our SIP trunks. Teams auto attendants and call queues work as normal, and the numbers stay yours.

Zoom Phone, Webex & Genesys

Bring your own carrier to the platforms that support it: Zoom Phone BYOC, Webex Calling through a Local Gateway, Genesys Cloud BYOC, and 3CX or any standards-based PBX on a plain SIP trunk.

Hosted PBX

A complete phone system on the NGN voice platform, hosted and patched by us: extensions, busy lamp fields, call park and pickup, paging, conferencing, hot desking and an operator panel, managed from one web portal.

IVR, Time Conditions & Call Flows

Auto attendants, business hours and public holidays, day and night modes, follow me and call forwarding: every call lands with the right person, and after-hours calls go exactly where you choose.

Call Centre Queues

Inbound queues with agent tiers, ring strategies, announcements and music on hold, plus agent log in and out, so a busy team handles peaks smoothly and every caller is answered in turn.

Voicemail to Email

Every voicemail arrives in your inbox as an audio file, with an optional written transcription, so messages are read on the go and nothing waits for someone to dial in.

Call Recording & Reporting

Record all calls or chosen ones, with recordings searchable alongside call detail records. Reports show call volumes, missed calls and queue performance, so you can staff for the peaks you actually get.

Security & Fraud Controls

Encrypted signalling and media to handsets that support it, automatic blocking of addresses that probe the system, per-extension dialling rights and call limits, and international dialling enabled only where it is needed.

Bring Your Own Carrier

SIP into the clouds you already use

Keep your numbers on our SIP trunks and connect them to the calling platform your people prefer. Change platforms later without changing a single number.

Microsoft Teams Phone

Direct Routing

Teams users call on your own numbers, connected through a session border controller to our SIP trunks, inside the Teams app they already use.

Zoom Phone

Bring Your Own Carrier

Zoom Phone users keep the Zoom app and your existing numbers, with calls in and out carried on SIP trunks we manage.

Webex Calling

Local Gateway

Webex Calling reaches the public network through a Local Gateway on your premises or ours, using your own SIP trunks and numbers.

Genesys Cloud

Bring Your Own Carrier

Contact centres on Genesys Cloud keep their 1300 and 1800 numbers on a carrier of their choice, connected over SIP.

Your own IP PBX

SIP trunk

3CX, FreePBX, Asterisk, Yeastar and other standards-based PBXs on a plain SIP trunk, with failover and number porting handled. Platforms we build on.

NGN Hosted PBX

Hosted · managed 24/7

Or let us run the phone system too: hosted, patched and monitored by NGN, with desk phones, softphones and mobile apps.

Microsoft Teams, Zoom, Webex, Genesys Cloud, 3CX, Asterisk, FreePBX and Yeastar are trademarks of their respective owners. NGN connects to these platforms as a carrier and integrator and is not affiliated with or endorsed by them.

Platforms

PBX platforms we build on

Already invested in a phone platform, or choosing one? We design, deploy, integrate, migrate and support solutions on the leading open-source and commercial systems, and connect every one of them to our carrier-grade voice network.

Asterisk, FreePBX, FreeSWITCH, FusionPBX, Kamailio, Wazo, 3CX, Yeastar, Grandstream, Cisco, AudioCodes, Ribbon, Avaya, Mitel, NEC and Panasonic are trademarks of their respective owners. Names and logos identify the platforms we work with; NGN is not affiliated with or endorsed by their owners.

Hosted PBX

NGN Hosted PBX: a full phone system, looked after

The NGN Hosted PBX runs on our carrier-grade voice platform, multi-tenant, kept current and monitored around the clock, with the full feature set available and your configuration exportable at any time.

Design call flows in plain terms (who answers, when, and what happens next) and we build them, or manage them yourself in the web portal.

  • IVR menus & auto attendant
  • Time conditions & holidays
  • Ring groups
  • Call centre queues & agent tiers
  • Follow me & call forward
  • Voicemail to email
  • Voicemail transcription
  • Call recording
  • Conference bridges
  • Busy lamp field (BLF)
  • Call park & pickup
  • Paging & intercom
  • Hot desking
  • Operator panel
  • Music on hold
  • Call block
  • Fax server & fax to email
  • WebRTC
  • Call detail records
  • Auto-provisioned handsets
  • Multi-tenant domains
Handsets

Choose your handset

Current-generation desk phones and cordless handsets, supplied, branded and auto-provisioned, so each phone configures itself the moment it is plugged in. Softphone and mobile apps cover everyone else.

Yealink

Yealink SIP-T54W

The all-rounder: a tilting colour screen, Wi-Fi and Bluetooth for busy desks.

  • 4.3" colour display (480 x 272)
  • 10 line keys, up to 16 SIP accounts
  • Dual-band Wi-Fi, Bluetooth 4.2
  • Dual Gigabit ports with PoE
Zero-touch provisioning
Yealink

Yealink SIP-T58W Pro

The executive phone: a 7" Android touchscreen and a cordless Bluetooth handset.

  • 7" adjustable touchscreen (1024 x 600)
  • Bluetooth handset (BTH58) included
  • Up to 16 SIP accounts
  • Dual-band Wi-Fi, Bluetooth, 2 x USB
Zero-touch provisioning
Cisco

Cisco Desk Phone 9861

Cisco's current desk range, with AI background noise removal on every call.

  • 5" colour display (800 x 480)
  • 10 line keys
  • Dual-band Wi-Fi, Bluetooth 5.2, USB-C
  • Carbon Black or First Light finish
Zero-touch provisioning
Poly

Poly Edge E550

A 5" colour screen framed by a status light bar your team can see across the room.

  • 5" colour IPS display (800 x 480)
  • 12 line keys, 48 assignments
  • Bluetooth 5.0, Wi-Fi
  • Built-in busy light bar
Zero-touch provisioning
Grandstream

Grandstream GRP2615

Carrier-grade and great value, built for zero-touch rollouts across many sites.

  • 4.3" colour display (480 x 272)
  • 10 line keys, 16 SIP accounts
  • 40 digital BLF keys
  • Wi-Fi, Bluetooth, Gigabit with PoE
Zero-touch provisioning
Snom

Snom D865

German-engineered, with a sharp 5" HD screen and self-labelling keys.

  • 5" tilting HD colour display (1280 x 720)
  • 10 self-labelling keys, 12 SIP accounts
  • Dual-band Wi-Fi, Bluetooth 5.0
  • 2 x USB, gunmetal finish
Zero-touch provisioning
Yealink

Yealink W79P

Rugged cordless DECT for warehouses, workshops and sites: IP67 and drop-proof.

  • W59R handset, IP67 rated
  • Up to 10 handsets per base
  • Up to 20 simultaneous calls
  • Up to 28 hours talk time
Zero-touch provisioning

Yealink, Cisco, Poly, Grandstream and Snom are trademarks of their respective owners. Product images are the manufacturers' own, shown with the NGN Voice screen we provision; NGN is not affiliated with or endorsed by these manufacturers.

Softphones and mobile apps. Your extension on a laptop or mobile, with the same number, voicemail and call recording as your desk phone. We provision apps such as Grandstream Wave, Linphone and Zoiper, and WebRTC puts a phone in the browser.

Migration

From ISDN to SIP, without missing a call

Moving off ISDN, analogue lines or an ageing on-site PBX is a planned project with a rollback, not a leap of faith.

  1. 1

    Audit

    Numbers and ranges, lines, call flows, handsets, recordings and contracts, documented before anything changes.

  2. 2

    Design & order

    Trunk capacity, call flows and number plan agreed, and porting lodged as a simple or complex port.

  3. 3

    Build & provision

    The new system built alongside the old one, handsets auto-provisioned and your team trained.

  4. 4

    Test in parallel

    Every call flow tested on temporary numbers, including after hours, queues and voicemail.

  5. 5

    Cut over

    Numbers ported in a quiet window, engineers watching the first calls, the old service kept until confirmed.

Technologies & Standards

The standards, platforms and devices we build, host and support.

SIP RTP T.38 fax TLS SRTP G.711 G.722 HD voice Opus WebRTC Teams Direct Routing Zoom BYOC Webex Local Gateway Genesys Cloud BYOC Yealink Cisco MPP Poly Grandstream Snom Fanvil

Product names and logos on this page are trademarks of their respective owners, used to identify the platforms and devices we work with. NGN is not affiliated with or endorsed by them.

Ready for a phone system that just works?

Tell us how you take calls today. We will map your numbers, platforms and handsets, and show you a clear path onto SIP and a hosted PBX.

Get in Touch Call 1300 096 253
Answers

SIP voice and PBX questions

Question not here? Ask an engineer →

What is a SIP trunk, and do we still need one with a cloud phone system?

A SIP trunk is the connection between your phone system and the public telephone network, carried over IP instead of copper or ISDN lines. It holds your phone numbers and carries every call in and out. Cloud platforms such as Microsoft Teams and Zoom Phone can use their own calling plans, or you can bring your own carrier: your numbers stay on a SIP trunk you control, which keeps one carrier, one bill and the freedom to change platforms without changing numbers.

Can we keep our existing phone numbers, including 1300 and 1800 numbers?

In most cases, yes. Geographic numbers move under Local Number Portability, and 13, 1300 and 1800 inbound numbers can be ported too, through their own process. A single number with no extra services is usually a simple port, completed within days. Number ranges and services with ISDN, line hunt or fax attached are complex ports that take longer, so we book them for a quiet cutover window and keep the old service live until the new one is answering.

Can we use our own carrier with Microsoft Teams or Zoom Phone?

Yes. Microsoft Teams Phone supports Direct Routing, which connects Teams to a carrier's SIP trunk through a session border controller. Zoom Phone offers Bring Your Own Carrier (BYOC), and Webex Calling and Genesys Cloud have their own equivalents. We connect each of them to SIP trunks on our carrier-grade voice network, so your people answer in the app they already use while the numbers, call routing and billing stay with one Australian carrier.

What happens to our calls if our office internet goes down?

With a hosted phone system, the PBX lives in a data centre, not in your office, so it keeps answering. Callers still hear your greeting and IVR, and calls can follow staff to their mobiles, to the Teams or softphone app, to another office or to voicemail that arrives by email. When your link comes back, desk phones re-register on their own. On our side, the voice core reaches carrier interconnects over more than one path, so a single failure is routed around.

Do VoIP phone services in Australia support Triple Zero (000) calls?

Yes. Two-way VoIP services in Australia must provide access to the emergency numbers 000 and 106, and we register each service address in the Integrated Public Number Database (IPND) so emergency operators know where a call is coming from. Because a VoIP phone can be plugged in anywhere, tell us when a phone moves to a new address, and keep a mobile handy for emergencies during a power or internet outage.

How do you protect a business phone system from toll fraud?

With controls that are on from day one: strong SIP credentials, encrypted signalling and media (TLS and SRTP) to phones that support them, automatic blocking of addresses that probe or fail to register, international dialling enabled only for the extensions that need it, concurrent call limits per extension, and alerts on unusual call patterns. Fraud usually strikes after hours, so we watch the platform around the clock.

Which desk phones work with the NGN Hosted PBX?

Most standards-based SIP phones. Our platform auto-provisions Yealink, Cisco Multiplatform (MPP), Poly, Grandstream, Fanvil and Snom handsets, among others, so a phone configures itself the moment it is plugged in: extensions, line keys, busy lamp fields, directory and firmware. Existing compatible handsets can usually be reused, and softphone apps cover laptops and mobiles.

Can you support a phone system we already run on FreePBX or 3CX?

Yes. We design, deploy, integrate and support phone systems built on FreePBX and Asterisk, 3CX, Yeastar, Grandstream UCM, Kamailio and other open-source and commercial platforms. That covers SIP trunks and number porting, high availability, handset provisioning, integrations with Microsoft Teams and business apps, upgrades, and migrations between platforms or onto the NGN Hosted PBX when the time is right.

How do we move from ISDN or an old on-site PBX without downtime?

We audit what you have (numbers, lines, call flows, handsets and contracts), build the new phone system alongside it, provision and test the handsets, and train your team before anything changes. Your numbers are then ported in a scheduled window, with engineers watching the first calls arrive and the old service still in place until the new one is confirmed.

Get in Touch

Talk to us about your phones.

Tell us your numbers, how many people take calls and what they answer on. We'll come back with a clear plan and a quote.

Australia

1300 096 253

International

+61 2 8287 3300

Email

support@ngn.au

Location

Sydney, NSW, Australia

Hours

Open 24 hours, 7 days

Send us a message

We reply the same business day

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