SIP Trunk Providers Australia

Keep your existing PBX. Port your numbers. Move your calls off copper — onto PIP’s own Australian network, not a wholesale resale chain.

Talk To PIP

How it works

30 +

Years operating our own network

30-50 %

Typical saving vs PSTN line rental

Same day

New DID numbers can go live in minutes

Sydney based

Setup, porting, and ongoing support

PIP owns its network

Not a reseller.
The infrastructure owner.

Most SIP providers in Australia buy wholesale from Telstra or Optus and mark it up. PIP built its own national internet network in 1995. When your SIP trunks run on PIP, they run on PIP’s infrastructure — not a carrier chain you’ve never heard of.

If your PSTN or ISDN lines are on their way out — or already gone — SIP trunking is the direct replacement. Your phone numbers stay put. Your handsets stay on the desks. What changes is how your calls travel: over your internet connection, through PIP’s own Australian network, instead of copper rented from a telco.

Australia’s copper PSTN network is being progressively decommissioned. Now is the right time to move — properly.

Talk To PIP

What Is SIP Trunking?

A virtual phone line. Same numbers. Fraction of the cost.

Your PBX System

3CX, Asterisk, NEC, Panasonic, Cisco…

PIP SIP Network

Australian-owned infrastructure since 1995

Public Telephone Network

Any number, anywhere in Australia

STD International Network

Every country, all nationalities, any network.

SIP = virtual phone lines

Where you once had four copper PSTN lines, you replace them with four SIP channels. Same call capacity — a fraction of the cost.

Runs over your broadband

Calls travel over your NBN or fibre connection to PIP’s network, then out to the telephone system. No copper required.

Scale in minutes, not weeks

Need more channels before a busy period? Add them instantly. No technician visit, no lead times, no line installation.

Your PBX stays in place

SIP trunks connect to any standards-compliant PBX. Same handsets, same extensions, same hunt groups — for your staff, nothing changes.

SIP vs PSTN / ISDN

Why businesses are making the switch

	✓ SIP Trunking	PSTN / ISDN
Infrastructure	✓ Internet (NBN / fibre)	Copper phone lines
Cost model	✓ Per concurrent channel	Fixed per physical line
Add capacity	✓ Instant — no installation	✗ Requires a technician visit
NBN compatible	✓ Built for it	✗ Being decommissioned
Geographic flexibility	✓ Any DID, any area code	Local exchange only
Business continuity	✓ Auto failover configurable	✗ Single point of failure
Typical savings	✓ 30–50% vs line rental	Baseline cost

Why choose PIP

Not a reseller. Not a helpdesk queue. The team that owns your infrastructure.

We own our network

PIP built its own national internet network in 1995. Your SIP trunks route through infrastructure we operate — not a wholesale chain sitting between you and your calls.

Works with your existing PBX

3CX, Asterisk, FreePBX, NEC, Panasonic, Cisco — PIP’s SIP trunks connect to any standards-compliant PBX. No proprietary hardware, no forced migration.

Sydney setup and support

We configure your trunks, handle porting, and test before go-live. If something goes wrong, it’s one call to one team — not a carrier fault queue.

Voice and internet, one provider

PIP supplies NBN and fibre nationally. Take both from PIP and you eliminate the gap — no blame-shifting between carrier and voice provider when something goes wrong.

Integrated managed IT

SIP trunks can be included in a PIP managed IT contract. Your phone system gets the same monitoring, proactive response, and support as your servers and endpoints.

No lock-in contracts

Month-to-month arrangements, scale channels up or down as your business changes. If your call volumes drop, you’re not paying for capacity you don’t need — and if they spike, you’re not waiting weeks for a technician to add a line.

Your numbers stay. Your PBX stays. Your phone bill doesn’t.

Move to SIP with zero disruption.

Your existing PBX stays in place. Your handsets stay on desks. Your numbers transfer across. The only thing that changes is how your calls travel — off copper lines you’re paying too much for, onto PIP’s own network at a fraction of the cost. Most businesses see 30–50% savings on line costs, and their staff notice nothing has changed.

Talk to PIP About SIP Trunking

Is It Right For You?

SIP trunking is the right move if…

You have an existing on-premises PBX and want to cut line rental costs

Your office has migrated to NBN and you’ve lost — or are losing — copper phone lines

You’re a multi-site business needing consistent DID numbers across locations

You need inbound numbers from any Australian area code, regardless of physical location

You want inbound calls to fail over to mobile if your internet circuit goes down

Call transcription and AI integration that logs every conversation to HubSpot, Salesforce, or your ERP the moment the call ends.

PSTN Decommissioning

Australia’s copper network is being switched off.

The PSTN is being progressively decommissioned as NBN rolls out. If your business hasn’t moved to SIP Phone System yet, it will need to — and the window to do it on your own terms is shrinking. Moving now means you control the timing, the migration, and the outcome.

How many SIP trunks do I need?

One trunk per concurrent call. A 20-person office typically needs 4–8 concurrent channels depending on call patterns. PIP assesses your actual volumes and recommends the right number — no guessing.

How PIP Delivers SIP Trunking

From assessment to live calls — end to end.

Assessment

We review your PBX, line config, call volumes, and number requirements before recommending anything.

Number Porting

Your existing business numbers transfer to PIP. Most standard numbers port within 5–10 business days.

Configuration

SIP credentials provisioned and configured directly against your PBX. PIP handles the technical setup end to end.

Testing

Full inbound and outbound call quality testing. Failover rules verified. We don’t sign off until it works.

Ongoing Support

Included in managed IT or standalone. PIP monitors trunks and responds directly — not via a carrier escalation chain.

IN PRACTICE

” We configured SIP trunks against their existing Panasonic system in an afternoon, ported their six business numbers across, and they kept everything — same extensions, same handsets, same hunt group. “

Phone bill dropped ~40% · Staff noticed nothing had changed

John — PIP Senior Engineer

North Shore professional services firm · 12-year-old Panasonic PBX · 6 numbers ported

FAQ

Common questions about SIP trunking

Not sure if SIP trunking is right for your setup? PIP’s team will assess your existing infrastructure and give you a straight answer.

Ask the Team

What is SIP trunking?

SIP trunking replaces physical phone lines with internet-based voice calls. Your PBX connects to a SIP provider’s network over your broadband connection and places or receives calls without any copper PSTN infrastructure.

Do I need new phone hardware?

No. SIP trunks connect to your existing PBX as long as it supports SIP — which most modern and semi-modern systems do. Your physical handsets stay exactly where they are.

Can I keep my existing phone numbers?

Yes. PIP handles number porting from your current provider. Most standard Australian business numbers port within 5–10 business days.

What happens if my internet goes down?

PIP either provides a 4G or 5G backup of configures failover rules on your SIP trunks — inbound calls automatically divert to a mobile number or alternate site if your primary circuit goes down. Outbound failover can also be configured.

Does SIP trunking work with NBN?

Yes. SIP trunking is designed for IP-based broadband. NBN is the standard business replacement for copper PSTN lines. PIP supplies both the NBN connection and the SIP trunks if required.

How quickly can trunks be set up?

New DID numbers can be active within hours of provisioning. Number porting from an existing provider takes 5–10 business days depending on the current carrier.

Is SIP trunking cheaper than traditional lines?

In most cases, significantly cheaper. You pay per concurrent channel rather than per physical line, and call rates over SIP are generally lower than PSTN. Most businesses see savings of 30–50% on line costs after switching.

Ready to move your calls off copper?

Talk to PIP about SIP trunking for your business — Sydney setup, Australian network, one team.

Contact PIP