SIP Trunks

SIP Trunks. Premium Grade SIP

Connect your new or existing PBX to our SIP channels. PAYG & Unlimited SIP available.

We understand that many business have a sunk cost in their on Prem PBX. It does the job and you would rather stay with the system you have and just get a better ROI. SIP provides cost effective voice rates, especially when compared to legacy ISDN.

Your SIP voice channels can be combined with existing data and internet access links. SIP trunks will connect directly to on-premises UC and late model PABX systems. Older PABX's can usually interface using gateways too.

Features and Benefits

ISDN replacement VoIP service

No significant Cap Ex in replacing your Phone System

Keep your ISDN & PSTN Numbers

Highly scalable, only pay for the lines you need

Greater redundancy than traditional phone lines

Significantly more cost effective and flexible than ISDN

PAYG & Unlimited plans available

Choose your contract term

Enquire Now

Options for older on-premises systems include:

Use an existing embedded IP card

Add an IP card

Add an ISDN gateway

Alternately an MS Teams Phone System or Cloud Business Phone Hosted PBX can be used to replace the phone system if it's too old.

Unlike ISDN, SIP is extremely scalable, and a cost-effective way to ensure your current infrastructure investment is fully optimised. If you’re not ready to move to Cloud Business Phone you can maintain your existing PBX and use a Next Telecom SIP Gateway to establish, manage and terminate calls to any network globally.

To keep your business running, SIP provides enhanced resilience and in the event of a failure can re-route using alternate, redundant links – including 4G services.

Whether you’re hearing about SIP for the first time, or you’re already planning to transform your business communications, Call Next Telecom to speak to an Australian based professional.

Next Telecom SIP as ISDN replacement


Married to your phone numbers? Number portability allows you to retain your existing numbers when switching providers.


SIP is a cost-effective way of ensuring your current infrastructure investment is fully optimised; delivering quick returns on your investment.


Order the lines you need now, and scale up (or down) quickly if required. SIP is the solution that grows with your business.


Only pay for the number of lines you need and the calls you make, saving you more.


With SIP you’re always online. Quickly divert your calls to alternative locations to safeguard your business in case of system failure.

Australia Based SUPPORT

Australia based support manned by customer service focused engineers.

Contact an Australian based Cloud Communications expert now

Let us show you why you should choose Next Telecom.

Call 1300 00 NEXT

to talk to our specialists


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