Voice service

A-Z voice termination for wholesale buyers

One SIP interconnect. Two clearly labelled route classes. Global coverage.

What we terminate

VoxioTelecom is a wholesale voice carrier. We terminate outbound SIP voice traffic from carriers, ITSPs, contact centers and enterprise PBXs to fixed and mobile networks worldwide.

Outbound A-Z termination over SIP (UDP/TCP/TLS)
G.711, G.729, Opus and iLBC codecs
T.38 fax on supported destinations
Prepaid and postpaid billing, per-second after 1s
IP authentication or SIP digest

Sample INVITE

INVITE sip:+4915123456789@sbc.voxiotelecom.net SIP/2.0
Via: SIP/2.0/TLS 10.0.0.12:5061;branch=z9hG4bK...
From: "Alice" <sip:+442071234567@customer.example>
To: <sip:+4915123456789@sbc.voxiotelecom.net>
P-Asserted-Identity: <sip:+442071234567@customer.example>
Route: <sip:premium-cli@sbc.voxiotelecom.net;lr>
Contact: <sip:alice@10.0.0.12:5061;transport=tls>
Content-Type: application/sdp

P-Asserted-Identity is preserved end-to-end on Premium CLI routes.

Route classes, made explicit

You choose exactly which class each traffic profile takes. Route selection can be based on destination prefix, source trunk or a header.

Premium CLI

Premium CLI routes

Original caller ID preserved from your PBX all the way to the terminating operator. This is the default for the majority of our A-Z destinations.

Direct Tier-1 interconnects
ASR > 55% / ACD > 4 min targets
Priority NOC & SLA reporting
Anti-CLI-refile enforcement

Standard

Standard routes

Cost-optimized capacity for traffic that is not sensitive to caller ID display. Used only for destinations where CLI cannot be guaranteed.

Best-effort caller ID
Lower per-minute rate
Ideal for notifications / IVR
Same platform, same monitoring

Platform

Carrier-grade infrastructure operated by the engineers who designed it. Active-active SBCs, deterministic routing, and independent monitoring on every leg.

Redundant SBCs

Frankfurt, Amsterdam, Ashburn. Active-active with sub-second failover.

SIP over TLS 1.3

SRTP media, IP or digest auth. IPv4 and IPv6 signaling.

LCR + quality routing

Per-destination profile weighted by ASR, ACD and CLI-delivery.

Anti-fraud engine

Realtime velocity, country and destination-type filters. Auto-block on anomaly.

Technical specification

What your NOC needs to know before we open a trunk. If your PBX speaks standard SIP, it speaks VoxioTelecom.

Signaling: SIP 2.0 over UDP, TCP or TLS 1.3. RFC 3261 compliant. IPv4 & IPv6.
Media: RTP or SRTP (AES-128). Symmetric RTP. NAT-traversal via SBC.
Codecs: G.711 A-law/µ-law, G.729ab, Opus, iLBC. Transcoding available on request.
DTMF: RFC 2833 / RFC 4733. SIP INFO on legacy destinations.
Fax: T.38 UDPTL on supported destinations. G.711 pass-through fallback.
Authentication: IP whitelisting (preferred) or SIP digest with per-trunk credentials.
Capacity: No hard CPS/CC caps. Soft-limits agreed per customer, elastic on request.
CDRs: Real-time webhook, hourly API pull, or SFTP push. RADIUS on request.

Billing that respects the second

No connection fees. No hidden minute rounding. No monthly minimums. You pay for the seconds you use, on the payment rail that fits your treasury.

Prepaid

Fund by wire, credit card, SEPA or USDT/USDC. Balance visible in real time. Auto top-up when balance crosses your threshold.

Postpaid

Weekly or bi-weekly invoicing for approved accounts. Net-14 payment terms. Multi-currency: EUR, USD, GBP.

Per-second billing

First second minimum, then billed by the second. CDR shows exact duration — no 60/6 or 30/30 rounding.

See the live rate deck

Create an account to browse the full A-Z deck in your portal — Premium CLI and Standard clearly labelled, searchable by prefix or destination.

Create account