RingCentral | Synthflow

RingCentral has two products that connect to Synthflow in different ways. RingCX, RingCentral’s contact center platform, routes voice queue calls into Synthflow natively. RingEX, RingCentral’s business phone system, connects through a SIP-extension setup that is being sunset and is no longer recommended.

For RingEX, we recommend forwarding your RingEX number over the PSTN to a Synthflow number or a Twilio number. You can also use the RingCX integration, or route calls directly to Synthflow. Talk to your account manager to choose the right path.

Integrations

RingCX

Run Synthflow as an Intelligent Virtual Agent (IVA) in RingCX voice queues. Recommended for RingCentral contact centers.

RingEX

Legacy SIP-extension setup, kept for existing deployments while it is sunset.

Comparison

	RingEX SIP extension (legacy)	RingCX
What it is	RingCentral’s cloud business phone system (RingEX, formerly MVP)	RingCentral’s contact center platform
Integration model	Synthflow registers to RingCentral as a SIP IP phone (extension)	RingCX routes voice queue calls into Synthflow as an Intelligent Virtual Agent (IVA)
Synthflow number setup	Add the number on the Phone Numbers page with RingCentral SIP credentials. The Termination URI is your RingCentral SIP domain.	Import the workflow channel number with Phone Provider set to RingCX. The Origination URI is filled in for you (`sip:sip.synthflow.ai:32681`).
RingCentral-side setup	Provision a generic SIP IP phone in the Service Portal	Create an IVA integration and build a workflow in Workflow Studio
Call transfers	Warm and cold transfers (SIP or PSTN) work normally	Not supported from Synthflow. Return the call with the RingCX Handoff action.
Other limits	No outbound calling. Maximum 5 concurrent calls per extension.	Caller context is passed through a JavaScript node. Calls return to the RingCX workflow.

FAQ

Why is the RingEX SIP-extension integration being sunset?

The SIP-extension setup depends on RingCentral behavior outside Synthflow’s control, so we can no longer guarantee its reliability. The legacy setup stays documented for existing deployments, but we do not recommend it for new ones.

Do these integrations require the Enterprise plan?

Yes. SIP trunking and the RingCentral integrations are available on the Synthflow Enterprise plan.

Can Synthflow make outbound calls on RingCentral?

Not from a RingEX SIP extension. RingEX SIP extensions registered through Synthflow cannot place outbound calls, so use a Synthflow number or a Twilio number instead. With RingCX, Synthflow handles inbound voice queue calls routed from the RingCX workflow.