Fits your setup

Connecting CallWhiz AI to your phone lines over SIP

CallWhiz AI agents run on your existing telephony over SIP, so nothing is replaced and you keep your numbers, carrier and rates. Routing is per number, so one account can run different agents on different lines.

Updated 21 September 2026

In short: Agents connect to the telephony you already have, over SIP. No replacement of your phone system.

Definitions

SIP
The protocol phone systems use to carry calls over the internet. CallWhiz AI connects to your existing cloud or on-premise platform over it.
Per-number routing
Each number maps to an agent, so different lines can run different agents and an agent can be swapped on a number without touching the carrier.
Bring your own carrier
Keeping your own carrier account, and its rates, while CallWhiz AI handles the calls.

What it does

  • Connects over SIP to your existing setup, including major cloud and on-premise platforms.
  • Or take a number from us: call destinations in 180+ countries, numbers available in 20+.
  • Inbound and outbound from the same agent. One build, both directions.
  • Bring your own carrier account if you have one, and keep your rates.
  • Recording, transcripts and per-number routing included.

How it works

Inbound routing is per number, so one account can run different agents on different lines, and an agent can be swapped on a number without touching the carrier.

Related questions

Will it replace my phone system?

No. It connects to your existing telephony over SIP. You keep your numbers, your carrier and your setup.

Does CallWhiz AI work with my existing phone number and phone system?

CallWhiz AI connects over SIP to the telephony you already have, including major cloud and on-premise platforms, so you keep your numbers, your carrier and your rates. You can also take a number from CallWhiz AI: call destinations in 180+ countries, with numbers available in 20+.

Which countries can CallWhiz AI call?

CallWhiz AI can place calls to destinations in 180+ countries and offers phone numbers in 20+ countries. You can also bring your own carrier account and keep your rates.

Put an agent on a number this afternoon.

Sign up, describe the job, attach a line, and pay per minute. No sales call, no platform fee, no seat licences, no minimum.