“At Applied we’ve been using Bellcom for our phones and internet services for years and couldn’t be happier with the service provided. Everything has been reliable, professional, and handled quickly whenever we needed support. A special mention to Joe, who has always been fantastic with backup service and support. He’s always helpful, responsive, and goes the extra mile to make sure everything is sorted with minimal hassle. Highly recommend Bellcom to anyone looking for reliable phone and internet services along with excellent customer support.”
SIP trunks connect your existing phone system (PBX) to the phone network over the internet, replacing old ISDN and analogue lines. If you have a phone system you’re happy with but want lower call costs and to be ready for the PSTN/ISDN switch-off, SIP trunks are often the simplest, most cost-effective move. Bellcom provides and manages SIP trunks for businesses across Ireland.
Why businesses move to SIP trunks
- Lower call costs and line rental than traditional ISDN
- Keep your existing PBX and numbers — no need to replace everything
- Scale channels up or down to match how many calls you handle
- Built-in resilience — reroute calls to mobiles or another site if there’s ever an outage
- Ready for the switch-off — ISDN and PSTN are being retired in Ireland
The ISDN and PSTN switch-off — what it means for you
Ireland’s traditional phone lines are being phased out. Businesses still on ISDN will need to move, and SIP trunks are the natural replacement: you modernise the connection while keeping the phone system your team knows. If your PBX is genuinely near end-of-life, we may instead suggest VoIP phone lines or a Cloud PBX — we’ll give you the honest comparison.
Local advice and management
We assess your current setup, work out the right number of channels, handle the number porting and switchover, and manage the trunks for you afterwards. You get the cost savings and future-proofing without the disruption.
Still on ISDN, or paying too much for calls? Get a free quote and we’ll show you what SIP trunks would save you.
Frequently asked questions
SIP trunks connect your existing phone system to the phone network over the internet, replacing traditional ISDN/analogue lines — usually at a lower cost.
In most cases, yes. If your PBX is SIP-capable we can connect it; if it's very old, we'll advise on the best route.
Typically yes — lower line rental and call costs, and you scale channels to what you actually use. We'll quote clearly so you can compare.
Ireland's old phone network is being retired. Businesses on ISDN will need to move; SIP trunks are the standard, low-disruption replacement.
Yes — your existing numbers can be ported and kept.