Callivex SIP Trunking
Callivex SIP Trunking connects PBXs, contact-center platforms, and softswitches to the public telephone network over IP.
What Callivex SIP Trunking is
Callivex SIP Trunking connects PBXs, contact-center platforms, and softswitches to the public telephone network over IP. Its bidirectional trunks support voice traffic, with calls billed per connected second at five-decimal rate precision and no 60-second minimum or six-second rounding. Accounts use prepaid balances with real-time usage visibility and no volume commitments; custom rates are quoted based on destination mix, projected volume, and traffic profile. Trunks support IP authentication, SIP registration, or a hybrid setup, and the default IP-auth option allows up to eight source IPs per trunk. Callivex says it integration-tests with systems including Asterisk, FreeSWITCH, FreePBX, 3CX, Cisco UCM, and Microsoft Teams Direct Routing. It describes active-active SBC deployment, per-call carrier selection, and automatic failover. Its network lists 218 termination destinations and inbound local, national, and toll-free numbers in 96 countries, subject to local rules for toll-free availability. Security options listed include TLS signaling and SRTP media encryption. Pricing is on request. The service is offered on web and API platforms and serves telephony providers, businesses, and contact centers.
Good
- Bills per connected second without rounding minimums.
- Offers IP, registration, or hybrid authentication.
- Lists 218 termination destinations.
- Includes country allowlists and spend caps.
Watch out
- Custom rates require a quote.
- Accounts use a prepaid balance.
- Toll-free number availability depends on local regulations.
Who it suits
Callivex may suit VoIP carriers, cloud PBX operators, contact centers, enterprises, and other organizations connecting telephony systems to the public network. It is relevant to teams seeking prepaid, usage-based SIP trunking.
Verdict
Callivex offers configurable SIP connectivity with per-second billing and stated network protections. Organizations should request a quote based on their destinations and traffic profile.
Plans and prices
From Callivex SIP Trunking's own pricing page, checked 2 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Wholesale SIP trunking | Priced on request | No channel fees · Capacity and call-rate limits set per account · Premium-rate and satellite destinations opt-in · Prepaid balance; custom rates quoted per customer based on destination mix, projected volume, and traffic profile. |
The facts
Each one read from Callivex SIP Trunking's own pages, with the date it was checked.
What it does
- Authentication
- Trunks support IP authentication, SIP registration, or a hybrid configuration, and the default IP-auth option supports up to eight source IPs per trunk.checked 2 Oct 2026
- Fraud controls
- Included account protections include country allowlists, spend caps, and anomaly detection; premium-rate destinations are opt-in.checked 2 Oct 2026
- Network coverage
- Callivex lists points of presence in Europe, Asia, North America, and the Middle East, with 218 termination destinations.checked 2 Oct 2026
- PBX compatibility
- Callivex says it integration-tests trunks with Asterisk, FreeSWITCH, FreePBX, 3CX, Cisco UCM, Microsoft Teams Direct Routing, and other listed systems.checked 2 Oct 2026
- Phone numbers
- Callivex offers inbound local, national, and toll-free numbers in 96 countries, with toll-free availability subject to local regulations.checked 2 Oct 2026
- Prepaid accounts
- Accounts use a prepaid balance with real-time balance and usage visibility, and no volume commitments.checked 2 Oct 2026
- Privacy and data
- Callivex says its published data processing agreement covers call records and personal data used in routing, and call content is not stored unless recording is enabled.checked 2 Oct 2026
- Resilience
- The service describes active-active SBC deployment, per-call carrier selection, and automatic failover on 5xx errors and PDD spikes.checked 2 Oct 2026
- Security
- The network page lists TLS 1.2+ signaling, SRTP media using AES-128 or AES-256, optional mutual TLS, source-IP enforcement, and SIP scanner mitigation.checked 2 Oct 2026
- Support
- The network operations centre handles live faults 24 hours a day, while quotes, onboarding, and account changes are handled during UK business hours.checked 2 Oct 2026
- What it does
- Callivex provides bidirectional SIP trunks that connect PBXs, contact-center platforms, and softswitches to the public telephone network over IP.checked 2 Oct 2026
- Who it serves
- Callivex describes its customers as VoIP carriers and ITSPs, CPaaS and AI voice platforms, cloud PBX operators, resellers, enterprises, small businesses, and contact centers.checked 2 Oct 2026
Money
- Billing
- Calls are billed per connected second with five-decimal rate precision, with no 60-second minimum or six-second rounding.checked 2 Oct 2026
- Trial and onboarding
- The SIP trunking page says customers can request a trial trunk, and the pricing page says a test trunk is provided after contract and initial top-up.checked 2 Oct 2026
The company
- Headquarters
- London, United Kingdomchecked 28 Sep 2026
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