🔗Trunks, SIP & PRI

Connect Your PBX to the World.

SIP trunk provisioning and ISDN PRI connections — scalable, cost-optimised, and configured with failover so your calls never stop.

What We Deliver

A SIP trunk or PRI connection is the bridge between your internal PBX and the public telephone network. Without it, your extensions can only call each other. With it, they can reach any phone in the world — and be reached from any number.

Layerix handles the full scope — provider provisioning, PBX integration, DID allocation, call testing, and failover — so you never have to speak to a telecom provider about SIP configuration yourself.

Full Scope

✓Existing line audit & trunk requirement analysis
✓SIP trunk provider selection & provisioning
✓ISDN PRI hardware supply & installation
✓PBX integration & dial plan configuration
✓DID (Direct Inward Dial) number allocation
✓Inbound & outbound call testing
✓Failover route configuration
✓Concurrent call capacity sizing
✓Number porting coordination
✓Full documentation & handover

SIP Trunk vs ISDN PRI

Feature	SIP Trunk	ISDN PRI
Physical infrastructure	Internet connection	Dedicated copper circuit
Cost	Lower — pay per channel	Fixed — 30 channels per PRI
Scalability	Add channels instantly	In blocks of 30
Geographic flexibility	Any location with internet	Fixed to circuit location
Redundancy	Multiple provider options	Backup circuit required
Number portability	Full DID flexibility	Limited to circuit range
Hardware required	None beyond PBX	PRI card in PBX