Solutions | SIP Trunking, Enterprise VoIP, CPaaS & Wholesale

Replace a legacy PRI

Swap TDM circuits for elastic SIP with number porting handled by our team. Typically 40–60% lower cost per channel.

Scale a contact centre

Burst to tens of thousands of concurrent calls without pre-provisioning capacity or renegotiating your contract.

Ship voice in your product

Programmable voice, SMS and verification APIs with sandbox keys issued at signup and clean webhook signatures.

Buy or sell wholesale

Direct A-Z termination with daily rate decks, quality tiering and settlement terms that suit your cash cycle.

Growth (up to 250 seats)

Pay-as-you-go SIP with self-service provisioning, sane defaults and no minimum commitment. Live the same day.

Mid-market (250–2,500 seats)

Dedicated trunks, committed rate tiers, a named account engineer and quarterly route reviews.

Enterprise (2,500+ seats)

Private interconnects, custom SLAs, regional data residency and direct NOC escalation paths.

Financial services

Recorded lines with regional residency, immutable CDR archives and STIR/SHAKEN attestation for outbound.

Healthcare & insurance

Encrypted media end to end, strict access logging and BAA-compatible processing arrangements.

SaaS & marketplaces

Programmable voice and verification embedded in-product, with per-tenant usage reporting out of the box.

01 — Connectivity

Global SIP Trunking

Scalable, crystal-clear voice connectivity engineered for unified communications — one trunk, every region you operate in.

Channels expand and contract with your traffic rather than sitting idle at your peak forecast. Signalling rides TLS 1.3, media rides SRTP, and every trunk terminates on geo-redundant SBC clusters so a single site failure never becomes your outage.

Elastic concurrency with no hard channel ceiling
Local, national, toll-free and mobile numbers in 90+ countries
Certified interop with Teams Direct Routing, Zoom Phone and 3CX
IP authentication or SIP registration — your choice per trunk
Managed number porting with parallel-run cutover

Get SIP pricing

90+ countries

Direct number provisioning with local regulatory documentation handled for you.

Instant burst

Seasonal or campaign spikes absorbed without a capacity ticket or contract change.

Encrypted by default

TLS 1.3 signalling and SRTP media on every trunk, not as a paid add-on.

Geo-redundant

Automatic SBC failover between regional clusters with session preservation.

20,000+ CC

Concurrent calls per cluster, sustained — not a marketing burst figure.

Sub-40ms PDD

Regional post-dial delay targets written into enterprise SLAs.

HD codecs

Opus and G.722 supported end to end where the destination network allows.

Dialler-ready

Predictive dialler, IVR and AMD traffic patterns supported without throttling surprises.

02 — Scale

Enterprise VoIP

High-capacity infrastructure custom-built for large-scale operations and contact centres that cannot afford a busy-hour surprise.

Contact-centre traffic behaves nothing like office calling — short durations, aggressive concurrency, brutal sensitivity to post-dial delay. We size, tune and monitor for that pattern specifically, and we tell you which destinations will fight you before you launch the campaign.

Call recording with configurable regional data residency
Per-campaign routing profiles and CLI management
Real-time concurrency and ASR alerting via webhook
Tested templates for CUBE, Acme Packet, AudioCodes, FreeSWITCH and Kamailio

Discuss capacity

03 — Developers

CPaaS & API Integration

Embed flexible voice, messaging and authentication features directly into your software — without becoming a telecom company.

REST endpoints that behave predictably, webhooks that are signed and retried, and SDKs maintained against the same API version your account is pinned to. Sandbox credentials are issued the moment you sign up, so your team can prototype before procurement finishes reading the MSA.

Programmable voice: originate, bridge, record, transcribe
SMS and verification with fallback-to-voice OTP
SDKs for Node, Python, Go, PHP, Java and .NET
Per-tenant usage reporting for multi-customer platforms

Get sandbox access

place-call.js

// Place an outbound call on the CarriersGrid network
import { Grid } from '@carriersgrid/sdk';

const grid = new Grid(process.env.CG_API_KEY);

const call = await grid.calls.create({
  from:      '+442038000112',
  to:        '+4915112345678',
  profile:   'quality-first',
  record:    true,
  webhookUrl:'https://api.acme.io/voice'
});

console.log(call.id, call.route.pop);
// cg_9f3ac21e  ·  fra-01

Median API response time across all regions: 84 ms. Versioned endpoints, never a breaking change without 90 days' notice.

04 — Carrier

Wholesale Voice Termination

Direct-route carrier termination across global markets at competitive rates — with quality tiers you select per destination rather than inherit.

A

Premium tier

Direct operator interconnects with full CLI, highest ASR and the tightest PDD. Built for retail-facing and regulated traffic where quality is non-negotiable.

Guaranteed CLI delivery
No transit resellers in path

B

Standard tier

Balanced quality and cost for high-volume outbound where a marginal ASR difference matters less than the per-minute rate.

Best-effort CLI
Quality-floor enforced by the routing engine

C

Value tier

Cost-optimised routes for internal, testing and non-revenue traffic. Fully disclosed as value tier — we do not slip these into a premium deck.

Lowest per-minute rates
Transparent tier labelling on every route

Daily rate decks

A-Z pricing refreshed every 24 hours, delivered by portal, email or API pull.

Flexible settlement

Prepay, weekly or net-30 terms once credit review is complete. Real-time balance visibility.

Bilateral welcome

Have termination we need? We swap capacity as readily as we sell it.

Dispute in 48h

Route disputes triaged with CDR evidence inside two business days, not two weeks.

Across Every Product

Fraud protection and compliance built into the path

Toll fraud rarely announces itself. Our controls run inline on every call, so anomalies get throttled while they are still cheap.

Velocity limits, destination allow-lists, geo-anomaly scoring and spend ceilings are configured per trunk and enforced in the signalling path rather than reconciled after the invoice. When something trips, you get a webhook and a phone call — in that order.

Inline fraud scoring

Per-call risk scoring on destination, velocity and pattern deviation.

Spend ceilings

Hard and soft caps per trunk, per destination group, per hour.

Data residency

Recordings and CDRs pinned to the region you nominate, contractually.

STIR/SHAKEN

Attestation signing and verification reporting on North American traffic.

Not sure which product fits?

Describe your traffic in two sentences. A solutions engineer will tell you which of the four you actually need — including if the answer is none of them.

Ask an Engineer Compare Plans

Tailored telecom solutions for enterprise success