Elastic Channels
Scale concurrent call capacity up or down to match demand, without re-provisioning hardware.
SIP Trunking
SIP trunks that behave like infrastructure should.
Reliable SIP connectivity for enterprises, PBX systems, contact centres and communication platforms — provisioned fast, monitored constantly, and built to scale with your call volumes.
Overview
Connect any PBX or platform to the global network
Vireon SIP trunking replaces legacy ISDN and fragmented local carrier relationships with a single, standards-based connection to global voice. Whether you run an on-premise PBX, a cloud contact-centre platform or your own software stack, our trunks present a clean SIP interface with predictable behaviour.
Capacity is elastic: channels scale up for seasonal peaks and campaign traffic without hardware changes. Inbound and outbound calling, number presentation and failover behaviour are all configurable per trunk.
Every trunk is backed by the same monitoring and routing infrastructure that carries our wholesale traffic — so enterprise customers get carrier-grade treatment by default.
At a glance
| Signalling | SIP over UDP, TCP or TLS |
|---|---|
| Media | RTP / SRTP |
| Codecs | G.711, G.729, Opus and others on request |
| Authentication | IP allowlist or credentials |
| Channels | Scalable per agreement |
| Emergency services | Availability varies by country — confirm with sales |
Service parameters are configured per agreement. Contact sales for specifics.
Capabilities
Capabilities that matter in production
Flexible Authentication
IP-based or registration-based authentication, with TLS and SRTP options for encrypted signalling and media.
Automatic Failover
Configurable failover destinations keep inbound traffic flowing if your primary endpoint becomes unreachable.
Number Portability
Bring existing numbers or provision new DIDs across markets, all delivered to the same trunk.
Live Monitoring
Trunk health, registration state and call quality metrics monitored around the clock by our NOC.
Interop Tested
Works with common PBX and softswitch platforms; our engineers assist with configuration and interop testing.
Common Questions
Frequently asked questions
Will Vireon trunks work with my PBX?
Trunks use standard SIP and interoperate with common PBX and softswitch platforms. Our onboarding engineers help validate your specific configuration during setup.
Can I keep my existing numbers?
In many markets, yes — porting availability depends on country and number type. We confirm portability for your numbers before you commit.
How is call capacity licensed?
Capacity is defined in concurrent channels and can be adjusted as your needs change. There is no physical circuit to re-provision.
Do you support encrypted calls?
TLS signalling and SRTP media encryption are available on request and configured per trunk.
Ready to discuss SIP Trunking?
Talk to our team about routes, rates and interconnection options.