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 is for
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 is good
- 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.
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.
Get started with Callivex SIP Trunking
- Visit the Callivex website.
- Request a trial trunk or contact Callivex for a quote.
- Agree on rates based on your destination mix, projected volume, and traffic profile.
- Set up a prepaid account and initial top-up.
- Choose IP authentication, SIP registration, or a hybrid configuration.
- Connect a compatible PBX or voice platform through the web or API offering.
Limits to know first
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.
Questions about Callivex SIP Trunking
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.
Callivex SIP Trunking plans and pricing
All plansCompared on SIP trunking providers
- Number porting
- Yes
- Emergency calling
- Yes
- Toll-free numbers
- Yes
- Encrypted signaling
- Yes
