Choose and record the authentication model
Wavix publishes static-IP and username-based authentication for connecting an existing SIP system. Record which method the account actually uses, the authorized egress address or credential owner, and the production signaling target. A source-address rule and a username are different controls and need different rotation, monitoring and recovery plans.
The reviewed pages do not establish a SIP REGISTER workflow, registrar, binding lifetime or dependency between registration and inbound delivery. Do not infer registration from the phrase username-based authentication. Confirm the current account procedure before selecting a PBX template or using registration state as the trunk health signal.
Documented service facts
Reviewed 2026-09-28. Compare SIP trunk services →
Authentication
DocumentedWavix documents static-IP and username-based authentication for connecting an existing SIP platform. Record which method the account actually uses, the authorized egress address or credential owner, and the production signaling destination; the two methods are not interchangeable health signals.
SIP registration
Not verifiedThe reviewed public pages say username-based authentication is available but do not establish a SIP REGISTER workflow, registrar address, binding lifetime or inbound-routing dependency. Confirm the current account procedure before selecting a registration template or treating an absent REGISTER state as a fault.
Inbound delivery
DocumentedWavix documents routing a purchased number to a SIP-capable PBX or forwarding it to an external number. Preserve the exact number, selected route, destination URI or address, identity format and fallback ownership; provisioning a trunk alone does not prove that the number points to it.
Inbound failover
Not verifiedThe provider advertises redundant trunking and multiple fail-over options, but the reviewed public pages do not define customer destination order, response-code triggers, timers, restoration or active-call behavior. Obtain the applied route policy and test each approved failure state; data-centre count is not proof of customer-site recovery.
Number and regional availability
Not verifiedWavix markets local, mobile and toll-free numbers in more than 140 countries and API or portal provisioning. Exact inventory, address or identity documents, voice and messaging capabilities, portability and activation are country-, number-, account- and date-specific; verify the intended transaction rather than relying on the headline count.
Audio codecs
Not verifiedThe reviewed public product and pricing pages promote HD voice but do not publish an exact trunk codec list, DTMF method, transcoding rule or packetization policy. Preserve the real SDP offer and answer and qualify required destinations before choosing a PBX codec allow list.
T.38 fax
Not verifiedNo T.38 or fax-over-audio procedure was verified in the reviewed first-party product and pricing pages. Confirm the exact number, direction, gateway, carrier path, page profile and fallback behavior before relying on fax.
Signaling and media encryption
DocumentedWavix documents TLS-encrypted SIP signaling and SRTP-protected media as available and lists secure audio as included on the reviewed voice pricing page. Availability does not establish that a particular trunk has it enabled; verify transport, certificate validation, SRTP profile, keying and fallback on both call directions.
Concurrent calls and call starts
Not verifiedWavix uses terms such as unlimited outbound capacity, scalable inbound capacity and tens of thousands of concurrent inbound calls. Those statements do not define the selected account's concurrent-call, calls-per-second, destination or burst controls. Obtain enforceable limits and an authorized load-test plan separately.
Emergency calling
DocumentedWavix lists emergency calling as an add-on, describes assigning an emergency address and routing to a public-safety answering point, and says Flex Pro includes emergency and short-code dialing in more than 40 countries. Eligibility, calling identity, location validation, callback, activation and approved testing remain account- and country-specific.
Pricing model
DocumentedWavix publishes usage-based starting rates, separate number and add-on charges, a Flex monthly minimum starting at $15 and Flex Pro starting at $250. The minimum is not an included-usage promise, and displayed routes or examples are not a quote. Preserve the dated destination rate, billing increment, number rental, add-ons, taxes and account commitment.
Administration and support
DocumentedWavix documents portal and API provisioning, call and message detail records, email support on Flex and priority support plus an account representative on Flex Pro. These features do not establish an SLA or response time. Export applied routes and security settings and retain account terms, traces and provider cases together.
SMS
Not verifiedWavix offers SMS-enabled numbers, APIs, delivery reports and per-message pricing, but eligibility, sender registration, consent, throughput, segmentation, carrier fees and inbound support vary by number and destination. Treat messaging as a separate acceptance path from voice and verify the current program before launch.
Bind every number to its actual inbound route
Wavix documents pointing an international number to a SIP-capable PBX or forwarding it to an external number. Preserve the number, route type, destination URI or address, identity format and responsible owner. Provisioning a trunk does not prove that a number reaches it, and an outbound call does not validate the inbound assignment.
The provider promotes redundant trunking, ten data centres and multiple fail-over options, but the reviewed public pages do not define customer destination priority, response-code triggers, timers, restoration or preservation of established calls. Obtain the applied route policy and pilot approved failure states before representing this as customer-site recovery.
Qualify media, fax and protected transport separately
The reviewed product page promotes HD voice but does not publish an exact trunk codec list, DTMF method, packetization or transcoding policy. Preserve the actual SIP offer and answer, negotiated codec and observed media path for each required direction and destination. No T.38 or fax-over-audio procedure was verified, so fax remains a separate end-to-end qualification.
Wavix documents TLS signaling and SRTP media as available and lists secure audio as included on the reviewed voice pricing page. That does not prove it is enabled on a selected trunk. Verify transport, certificate validation, SRTP profile, keying and downgrade or fallback behavior on both call directions.
Turn capacity language into account limits
Wavix uses phrases including unlimited outbound capacity, scalable inbound capacity and expansion to tens of thousands of concurrent inbound calls. Those are not a calls-per-second limit, a destination guarantee or an authorization to generate load. Obtain the effective concurrent-call, call-start, burst and route controls for the selected account in writing.
Build a bounded test plan with a provider-approved ceiling, stop conditions and observable rejection behavior. Keep customer PBX, access circuit, provider edge, destination and regulatory throttles separate. A high configured inbound ceiling is not evidence that every linked component or destination will sustain it.
Verify number, emergency and messaging state per service
Wavix markets local, mobile and toll-free inventory in more than 140 countries through a portal and API. Exact inventory, identity documents, portability, activation and voice or messaging capability remain specific to the number, country, account and date. Preserve the dated order result instead of treating the headline country count as availability.
Emergency calling is listed as an add-on with an assigned address and public-safety routing; Flex Pro advertises emergency and short-code dialing in more than 40 countries. Confirm eligibility, calling identity, validated location, callback and provider-approved testing. SMS-enabled numbers, APIs and delivery reports are separate: verify registration, consent, throughput, segmentation, carrier fees and inbound eligibility before launch.
Price the effective account and retain rollback evidence
The public pages show usage-based starting rates, separate number and add-on charges, a Flex monthly minimum starting at $15 and Flex Pro starting at $250. The minimum is charged when usage falls short; it is not proof of included usage. Capture the effective destination rate, billing increment, number rental, emergency and messaging add-ons, taxes, discounts and commitment terms at the decision date.
Before cutover, export authentication, number routes, emergency records, encryption settings and support contacts, then keep approved rollback targets with PBX traces and provider cases. No Wavix account, trunk, registration, number, call, codec, fax, failover, capacity, emergency call, message, rate, availability or support response was tested for this guide.
Sources & applicability
Primary references for the technical details above. Operational examples and planning checklists are VoIP.info editorial guidance.
- Wavix business SIP trunk ↗
- Wavix international phone numbers ↗
- Wavix pricing overview ↗
- Wavix voice pricing ↗
- Wavix account levels ↗
Examples require adaptation to your topology. No live PBX or hardware testing is claimed.