Business voice and numbers, direct from a wholesale carrier.

SIP trunking, virtual numbers and voice for businesses running on legacy PSTN or fragmented UCaaS providers. One provider, one invoice, one support contact.

Business voice from one provider.

Business voice

Voice for sales teams, contact centres and offices, delivered over direct carrier routes.

Standard SIP

Connect the PBX or UCaaS platform you already run over standard SIP trunking.

One invoice

Voice and numbers from one provider, on one invoice, with terms agreed up front.

One support contact

A single contact who knows your account. Not a ticket queue.

What enterprises use it for.

Replace legacy PSTN

Migrate your on-premise PBX to SIP trunking and keep the phone system your team already uses.

Global office numbers

Virtual numbers for regional offices. Local presence without local infrastructure.

Contact centre infrastructure

SIP trunking for inbound and outbound call centres, with call detail records for reporting.

Built on standard SIP.

Microsoft Teams Direct Routing
Zoom Phone
Cisco CUCM
Avaya
Asterisk
FreeSWITCH
3CX
Genesys
Five9
Amazon Connect

Platforms commonly connected over SIP.

Tell us about your voice setup.

We'll come back with what moving to Callvox would look like.

Contact us