A SIP trunk is a virtual communication channel that carries voice, video and messaging between your PBX and our network over IP, in place of physical ISDN or analogue lines. It initiates, maintains and terminates those sessions using the Session Initiation Protocol — hence the name.
If you have already invested in a phone system, trunking is usually the cheapest meaningful upgrade available to you. You keep the hardware, the handsets and the way your staff work. What changes is the connection behind it: instead of paying rental on a fixed number of copper lines, you buy channels that you can scale up or down as your call volume moves.
The commercial case is straightforward. Line rental disappears, long-distance and international calls cost materially less, and you stop paying for capacity you only need in December. The technical case is that a trunk can be failed over, load-balanced across sites, and reconfigured in minutes rather than in a scheduled provisioning window.
Trunk features
- Elastic channelsAdd or remove concurrent call capacity as demand changes, rather than committing to a fixed number of lines for the year.
- Bring your own numbersPort your existing range or take new Cyprus and international DIDs. Outbound CLI presentation is yours to set.
- Registration or IP authenticationRegister the trunk from behind NAT, or authenticate by static IP where you have one. Both are supported on every plan.
- Geographic flexibilityPresent a local presence in multiple locations without a physical line in any of them — useful for multi-branch and remote teams.
- Redundancy and failoverConfigure secondary routes so calls continue if a link, a site or a PBX fails. Inbound failover to mobile is included.
- Per-second billingNo minute rounding, itemised CDRs you can export, and spend caps to contain the damage if credentials are ever compromised.
Tested against the systems you are likely running
IP PBX guides
Step-by-step configuration for Asterisk, 3CX, FreeSWITCH and Mitel, with the exact parameters our network expects.
Softphone guides
Zoiper, GS Wave and Bria walkthroughs for staff who need an extension on a laptop or phone rather than a desk handset.
Secure by default
TLS for signalling and SRTP for media, IP restriction on every trunk, and automated alerting on unusual international traffic.
Want this costed for your business?
Send us your user count and current provider and we will put a written quote together, including porting and setup.