--- title: "Voice line" description: "Business voice lines delivered as a SIP trunk — connect your existing SIP phone system to the Lightning IP voice network. No lock-in contract and Australian support." url: "https://dev.www.lightningip.com.au/services/voice/voice-line" canonical: "https://dev.www.lightningip.com.au/services/voice/voice-line" updated: "2026-09-25" --- # Voice line Business voice lines delivered as a SIP trunk — connect your existing SIP phone system to the Lightning IP voice network. No lock-in contract and Australian support. ## Business phone lines for the system you already have Connect your existing infrastructure to our network via a SIP trunk — perfect for small to medium businesses running a SIP phone system. - No lock-in contract - Australian support - Keep your existing numbers - [Get started](https://dev.www.lightningip.com.au/contact) - [Call 1300 994 884](tel:1300994884) ## Keep your phone system, upgrade your calling A Lightning IP voice line is delivered as a SIP trunk: it connects your existing phone system (PBX) to our voice network over your internet connection, replacing traditional phone lines. Your team keeps the handsets and features they already know, while your calls run through Lightning IP. Add as many channels (concurrent calls) as your business needs, port your existing numbers across, and get help from our Australian support team to get your system connected. ## Because reliable connectivity matters more when you live and work regionally ### Built for regional Australia Our network isn't designed as an afterthought to metro infrastructure. We plan, invest, and optimise specifically for regional towns, business precincts, and essential services accounting for distance, demand, and real-world conditions so your connection performs when it matters most. ### Local people, real support When you call, you speak to a team based in your region not an offshore script. Our support staff understand local infrastructure, common setup challenges, and the urgency behind keeping homes and businesses online. We stay accountable from first call to full resolution. ### Independent and accountable As an independent provider, we make decisions locally and stand behind what we deliver. No lock-in contracts, no confusing fine print just transparent plans, honest advice, and long-term partnerships built on performance, not obligation. > How to review a business that smashes your expectations and leaves the best the competition can do in an archaic time? I waited 17 days for Telstra to deliver me a modem for my business and every time I called they had no progress. I decided I had enough, I call Lightning IP and within 30 minutes I had internet setup at my premises. Seriously ridiculous customer service. It's customer service you can get from small, privately owned business. If I could give them 50/5 I would. > > — Lachlan Esplin, Business Owner - Albury, NSW > Our business and our own customers alike have been using Lightning IP for the past 3 years now and I can honestly say that they are the best provider in the market, especially when you want a localised contact. The customer service they provide is top-notch, their network reliability is excellent, and the prices they offer are very competitive. Not to mention, they offer a variety of packages to suit any size business. > > — In4mative Tech, Business Owner - Young, NSW > After having constant drop out issues with other larger big name suppliers I made the switch to Lightning IP. The last months has been absolutely brilliant compared to the others. Yes we still have the odd drop out here and there, but not like before when we were having up to 7 or 8 daily or even more. We now seem to maybe get 1 or 2 very short ones in a week. For anyone in business in the area that needs reliable internet and awesome back up service. Get onto Lightning IP. > > — Brett Williams, Business Owner - Albury, NSW > After scouring posts on FB community pages for ISP recommendations, Lightning IP kept being mentioned as the 'go to'. I decided 'why not support local?', and I am SO glad I did! I was able to switch over my ISP easily online, and access technical support with Daniel the SAME day, pick up a new modem at quite literally an unbeatable price - and I am getting faster internet for the same price I was with our last ISP! > > — Linda Thompson, Home Owner - Albury, NSW 4.8 from local customers on Google. - [View all Google reviews](https://www.google.com/search?q=Lightning+IP+reviews) ## Frequently asked questions ### What is a SIP trunk? A SIP trunk connects your existing phone system (PBX) to our voice network over your internet connection, replacing traditional phone lines. You keep the phone system and handsets your team already knows, and make and receive calls through us. ### What do I need to use SIP trunks? You'll need a SIP-compatible phone system and a reliable internet connection. Let us know how many channels (concurrent calls) you need, how many sites you have, and which numbers you'd like to keep, and one of our specialists will work through the details with you. ### Can I keep my existing business phone numbers? Yes. We can port most existing numbers across from your current provider, so you keep the number your customers already know. We'll handle the paperwork and coordinate the transfer for you. ## Ready to connect your phone system? Let us know the basics about your business and one of our specialists will get in touch to discuss the details. - [Contact us](https://dev.www.lightningip.com.au/contact)