Reduce call costs without
cutting down on existing
phone lines with a SIP
trunking service.

Get reliable connectivity for your
business phone system.

Talk to an expert

Amplify your communications with Alltel

Expand your phone system
capabilities through a SIP
trunking service.

Expand your phone system capabilities through a SIP trunking service.

When it comes to running a business, minimising costs is as important as making a sale. With most businesses using only 30 to 40% of their phone lines at any time, it's no surprise that entrepreneurs often look at communications when it's time to cut back on costs.

So, how do you trim your expenses without decreasing your availability of the phone? Simple—through an Alltel SIP trunking service.

more great features

Enterprise-grade phone system
at no additional cost.

Flexible call schemes

Configure your call redirection schemes to fit your business needs.

Scale as needed

Upgrade or downgrade your plans anytime at no additional cost.

Save on costs

Cut down on monthly phone bills with free calls between extensions on the same Alltel account.

No lock-in contracts

Service is offered at no minimum term and no lock-in contract.

What is SIP trunking?

Remote hardware that connects
your phones to the cloud
to reduce costs.

What is SIP trunking?

Session Initiated Protocol or SIP trunking, is an enterprise-grade phone service that lets you enjoy the benefits of IP telephony while keeping your existing phone system. Instead of bundles of cable linked to the copper network, your IP-PBX system connects to fixed lines and mobiles through the internet.

SIP solutions work just like any traditional phone service. Every staff member will still have a direct phone number, but without the need to pay a line rental on every phone. Your business only pays for the number of lines you need to use simultaneously, and those lines are shared between all extensions.

How it works?

SIP trunking explained

Keeps your existing IP-PBX system.

The lines of your IP-enabled phone system are consolidated into SIP trunks—digital channels that eliminate the need for analog lines for each phone.

Connects to your Alltel SIP trunking service.

Your phone system connects to your Alltel SIP trunking service over the internet, which eliminates the need to install additional lines.

Uses IP telephony to make and receive calls.

All internal and external voice calls are carried over your data network. External calls are routed to the PSTN network through your SIP service.

Understanding SIP trunking

How can SIP trunking help?

Business-grade phone service that minimises costs.

Get the perfect balance between an on-premise system and an IP telephony with a SIP trunking service. Through a phone service with additional features delivered over the internet, you can enhance the use of your existing phone system without spending on new equipment.

Enhance your communication efficiency by eliminating the need for separate voice and data connections. A SIP service lets you maximise your internet bandwidth by adding voice traffic to your existing service and eliminates the need for line rental on lines you barely use.

Encourage communication among staff and across sites, with free Alltel to Alltel calls on the same account. At the same time, enjoy low rates for local, national, mobile, and 13/1300 calls. No additional charges for flagfall or call connection costs.

Reliable voice solution for business continuity.

Connecting your system directly to the public network puts you at risk for security breaches, power outages, inclement weather, or any major disaster in your area. A virtual phone service gives you the option to redirect calls to an alternate number in the event your office becomes inaccessible.

Our servers are located at multiple and redundant locations. As your SIP trunk provider, Alltel specialists are on-hand, 24/7 to monitor your system, which guarantees that if a server goes down or experiences a system issue, your phone service remains up and active.

Despite being a hosted service, your business retains full control over your phone system through a self-managed web-based portal. Add and move phone extensions, track your usage, or change configuration settings anytime as your needs change.

Scalable business SIP service for changing needs.

Your Alltel SIP trunking service gives you enhanced call concurrency and call volume, along with on-demand scalability. You get the option to add or remove trunks as your business requires, without the cost of additional installation and line rental.

Customise your call flow and determine which phones ring by configuring your redirection scheme. As your SIP trunk provider, Alltel can help you tailor a call solution that makes sure no customer call is ever missed.

IP telephony is built for the future. Through a SIP trunking service, you can access new features through an enhanced communications solution, without the need for further investment on equipment.

Robust enterprise solution that supports growth.

Expand your reach with virtual numbers that can be called at local rates from all across Australia. Encourage global connectivity and make business calls to outside Australia, thanks to low international call rates.

Connect multiple sites, remote workers, or work on the road with enhanced call redirection options. You can also program calls to ring specific extensions or mobile numbers when a specific line is engaged or down.

Direct in-dial or DID numbers.

Your direct in dial (DID) numbers are more than just regular phone numbers. These virtual numbers help widen your presence by giving you a 'local' business number for each area your business operates. What’s great about it is that customers that call your business are billed at local call rates, regardless of your office's' physical location.

Each plan comes with a specified number of DIDs. Additional numbers can be purchased for a low monthly charge. You have the option to get new numbers for your SIP service or keep your existing numbers (landline, VoIP, 1300 and 1800 numbers) by transferring them to Alltel.

Difference between DID numbers and extensions?

Many of our SIP plans provide different numbers of extensions and DIDs. While some use these terms interchangeably, these two should be differentiated.

DIDs are the numbers that external callers dial to reach you. On the other hand, an extension is an internal number for each of your office phones, faxes, and central voicemail boxes (called voicemail-only extensions). It is not necessary for the number of your DID numbers and extensions to be equal.

Every extension can have its own DID to be reached by external callers, while others may use a shared DID number (for example, a customer service team). You can even have DID numbers without an extension. These redirect callers to phones outside your system (for example a live answering service or mobile phone).

Is your internet connection up to speed?

Your Alltel SmartConnect® UC service is run over the internet, which means the clarity of your calls depends on the quality of your connection. As a rule of thumb, you need to be able to sustain 100 Kbps up and down with less than 4ms jitter. You can determine the compatibility of your connection through a PING test.

You should get results of:

  • Line quality of good or above
  • MOS of 4 or above
  • Ping of less than 100 ms
  • Packet loss of 0%

Even with good results from a PING test, there are other conditions such as network and router capabilities that may impact your service which a speed test will not see. Heavy data users that work with large files or want 6 or more extensions may need a dedicated internet connection with sufficient bandwidth to support your requirements. Alltel-provided phones typically use the G729 Codec, which uses the following average amounts of bandwidth for audio calls:

  • 1 minute call = 234 Kilobytes
  • 1 hour call = 13.71 Megabytes

These estimates are for a single direction only and assume one phone being used. If your provider charges for uploads as well as downloads, you will need to double these estimates. Our business consultants will also help you determine how much bandwidth is needed for your service.

Related blogs & videos

Learn more about SIP trunking service.

Frequently asked questions

Got more questions about
SIP trunking service?

What is a SIP trunk used for?

SIP trunking is used for call management. It uses the protocol to provision voice over IP connectivity between an on-premises phone system and the public switched telephone network or PSTN.

What is the difference between SIP trunking and VoIP?

While VoIP is limited to transferring voice data over the internet, SIP trunk is capable of transferring packets of multimedia data, whether voice, video, or text.

How can SIP trunks help your business?

SIP trunking allows the use of a hosted PBX for sending as well as receiving calls over the internet instead of the PSTN. With SIP trunking, you gain VoIP capabilities without the added cost of phone line installation.

Maximise your investment with a phone system
that streamlines your communication.