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Callivex SIP Trunking

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Callivex SIP Trunking's own site

What Callivex SIP Trunking is

Callivex SIP Trunking provides bidirectional voice connections over IP between the public telephone network and PBXs, contact-center platforms, or softswitches. It serves providers and organizations that route inbound or outbound calls through SIP trunks. Calls are billed for each connected second, with five-decimal rate precision and no 60-second minimum or six-second rounding. Accounts use a prepaid balance with real-time visibility into funds and usage, and no volume commitments; custom rates are quoted according to destination mix, projected volume, and traffic profile. Trunks can authenticate by IP address, SIP registration, or a hybrid setup, with up to eight source IPs on the default IP-auth option. Callivex describes active-active SBC deployment, per-call carrier selection, and automatic failover. Its network lists 218 termination destinations and inbound numbers in 96 countries. Security measures include TLS 1.2+ signaling and SRTP media, while fraud controls include country allowlists and spend caps. Pricing is available on request; platforms listed are web and API.

Who it suits

Callivex is aimed at VoIP carriers, ITSPs, CPaaS and AI voice platforms, cloud PBX operators, resellers, enterprises, small businesses, and contact centers. It may suit organizations seeking prepaid SIP trunking with usage visibility and configurable authentication.

What it does well

  • Charges per connected second without rounding increments.
  • Prepaid accounts show balance and usage in real time.
  • Offers local, national, and toll-free numbers in 96 countries.
  • Lists TLS signaling and encrypted SRTP media.
  • Includes country allowlists, spend caps, and anomaly detection.

What to know first

  • Pricing is available only on request.
  • Custom rates depend on customer traffic profile.
  • Toll-free availability depends on local regulations.
  • Premium-rate destinations require opt-in.

Limits

The Wholesale SIP trunking plan sets capacity and call-rate limits per account. Premium-rate and satellite destinations require opt-in; toll-free availability is subject to local regulations.

Plans

PlanBilled and limitsPrice
Wholesale SIP trunkingPrepaid balance; custom rates quoted per customer based on destination mix, projected volume, and traffic profile. · No channel fees · Capacity and call-rate limits set per account · Premium-rate and satellite destinations opt-inOn request

As callivex.com lists them, read 2 Oct 2026. The maker's own page has the final word.

Getting started

  1. Visit the Callivex website.
  2. Request a trial trunk or contact Callivex for a quote.
  3. Agree on rates based on your destination mix, projected volume, and traffic profile.
  4. Set up a prepaid account and initial top-up.
  5. Choose IP authentication, SIP registration, or a hybrid configuration.
  6. Connect a compatible PBX or voice platform through the web or API offering.

Verdict

Callivex offers bidirectional SIP trunks with granular per-second billing, multiple authentication options, and listed fraud controls. Pricing is quoted per customer, so buyers need to request rates for their destinations and traffic profile.

Questions

How is Callivex SIP Trunking priced?

Pricing is available on request. Rates are quoted per customer based on destination mix, projected volume, and traffic profile, and calls are billed per connected second.

Does Callivex offer a trial?

The SIP trunking page says customers can request a trial trunk. The pricing page says a test trunk is provided after contract and initial top-up.

Which platforms does Callivex support?

The listed platforms are web and API. Callivex says its trunks are integration-tested with systems including Asterisk, FreeSWITCH, FreePBX, 3CX, Cisco UCM, and Microsoft Teams Direct Routing.

Can I port numbers or use emergency and toll-free calling?

Number porting, emergency calling, and toll-free numbers are listed. Toll-free availability depends on local regulations.

How does trunk authentication work?

Trunks support IP authentication, SIP registration, or a hybrid configuration. The default IP-authentication option supports up to eight source IPs per trunk.

Where is Callivex based?

Callivex lists its headquarters as London, United Kingdom.

Facts from Callivex SIP Trunking's own pages

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. · callivex.com, 2 Oct 2026
Billing
Calls are billed per connected second with five-decimal rate precision, with no 60-second minimum or six-second rounding. · callivex.com, 2 Oct 2026
Fraud controls
Included account protections include country allowlists, spend caps, and anomaly detection; premium-rate destinations are opt-in. · callivex.com, 2 Oct 2026
Headquarters
London, United Kingdom · callivex.com, 28 Sept 2026
Network coverage
Callivex lists points of presence in Europe, Asia, North America, and the Middle East, with 218 termination destinations. · callivex.com, 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. · callivex.com, 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. · callivex.com, 2 Oct 2026
Prepaid accounts
Accounts use a prepaid balance with real-time balance and usage visibility, and no volume commitments. · callivex.com, 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. · callivex.com, 2 Oct 2026
Resilience
The service describes active-active SBC deployment, per-call carrier selection, and automatic failover on 5xx errors and PDD spikes. · callivex.com, 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. · callivex.com, 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. · callivex.com, 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. · callivex.com, 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. · callivex.com, 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. · callivex.com, 2 Oct 2026

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