Carrier-grade calling without the carrier contract.
TelzLink SIP trunking connects your PBX, dialer, or contact center platform to global voice termination over standard SIP. Multiple upstream carriers, least-cost routing, and transparent rates — without minimum commitments or multi-year contracts.
Problems this solves
Legacy carrier pricing is opaque
Bundles, minimums, and surcharges make it impossible to know what a minute costs. Our rates are itemized per destination.
Single-carrier risk
One upstream carrier means one point of failure. TelzLink routes across multiple carrier partners with automatic failover.
Slow provisioning
Getting a trunk from a legacy telco takes weeks of sales calls. A TelzLink trunk is credentials and an IP allowlist — same day.
How it works
Create your trunk
Get SIP credentials or register your IP. Works with Asterisk, FreePBX, 3CX, FusionPBX, and any standards-compliant PBX.
Point your PBX at us
Configure the trunk with our endpoint address, set your outbound routes, and place a test call.
Watch the routing work
Least-cost routing picks the best carrier per destination. CDRs and per-call costs appear in your portal in near real time.
What's included
Global termination
Outbound calling to virtually every destination, routed across multiple carrier partners.
Least-cost routing
Every call takes the best-priced quality route for its destination prefix.
SIP over TLS + SRTP
Encrypted signaling and media available for security-sensitive deployments.
Elastic capacity
Concurrent call capacity scales with your traffic — no fixed channel licenses.
Prepaid or postpaid
Start prepaid with full cost control, move to postpaid terms as volume grows.
Real-time CDRs
Per-call detail records with cost, duration, and route visible in the portal.
Works with your stack
Asterisk, FreePBX, 3CX, Vicidial, and any SIP-compliant system.
Fraud controls
Destination allowlists, spend limits, and velocity alerts protect against toll fraud.
Frequently asked questions
What is SIP trunking?
SIP trunking replaces physical phone lines with a virtual connection over the internet between your phone system (PBX) and the telephone network. Your PBX sends calls to TelzLink over SIP, and we carry them to their destination.
Which PBX systems are supported?
Any standards-compliant SIP system: Asterisk, FreePBX, 3CX, FusionPBX, Vicidial, Yeastar, and others. If it speaks SIP, it works.
How is billing calculated?
Per-destination rates with clearly stated billing increments, visible before you call. Prepaid balances give you a hard spend ceiling; postpaid terms are available on approval.
Is the trunk secure?
Registration and IP-authentication are both supported, with SIP over TLS and SRTP media encryption available. Spend limits and destination controls guard against toll fraud.
Is there a minimum commitment?
No. Start with a small prepaid balance, test quality on your real destinations, and scale when the numbers make sense.
Test us on your real routes.
Get a trunk, run test calls to your actual destinations, and compare the rates.