Integrations / Business phone systems and carriers

Use AssistCall with RingCentral

Keep your RingCentral number. Forward it to AssistCall when you're busy, don't pick up or after hours, and every call gets answered, booked or turned into a message, with a summary by email.

RingCentral: Cloud business phone system (RingEX) with calling, texting, video and team chat in one app, used by small offices up to large companies.

Connects

Example call

A patient calls a dental office's RingCentral number at 6:30 pm. After-hours handling forwards the call to AssistCall, which books a cleaning, and a Zap texts her the confirmation from the office's RingCentral number.

• In the RingCentral app's call handling settings, set missed calls and after-hours calls to 'Forward to external number' with your AssistCall number, so callers reach the receptionist instead of voicemail.
• When AssistCall books an appointment, a Zap uses RingCentral's Send SMS/MMS action to text the caller a confirmation from your business number.
• Post every call summary to a RingCentral team chat with Zapier's Create Post action, so the office sees messages taken overnight.

How it connects

• Call forwarding: Forward your business line to AssistCall when busy, after hours or always. Works with any carrier.
• Zapier: Send AssistCall events to a Zap (Webhooks by Zapier, Catch Hook), then use the app's Zapier actions. Needs a paid Zapier plan.
• Make: Start a Make scenario with a custom webhook and use the app's Make modules.
• n8n: Start an n8n workflow with a webhook node, then call the app with its node or an HTTP request.

About RingCentral's API

• Self-serve API: you can create a key in your account
• Style: REST, plus webhook and WebSocket event subscriptions
• Authentication: OAuth 2.0; a JWT credential (can be set to never expire) is exchanged for access tokens that expire within hours and must be refreshed
• On Zapier: yes. On Make: yes.

Anyone with a developer account can create an app and JWT credential, but every API call needs a short-lived access token (about 1 to 2 hours), so AssistCall can't call RingCentral live with a fixed header; use Zapier (Send SMS/MMS, Create Contact, Create Post), Make (RingCentral app) or n8n instead. Business texting through RingCentral needs carrier (TCR) registration. Forwarding: in the RingCentral app go to Settings > Phone > Call handling; set a work-hours schedule, then under Missed calls choose 'Forward to external number'. 'Forward all calls' (profile picture > Incoming call rules) can run on a schedule. A RingCentral community answer says the company auto-receptionist can't forward straight to an outside number, so route the main number to a user extension and forward that extension.

Not included: no one-click RingCentral app, no listing in RingCentral's marketplace, no two-way sync, and no partnership with RingCentral, Inc..

Researched by the AssistCall team and checked against RingCentral, Inc.'s public pages on October 24, 2026. RingCentral is a trademark of RingCentral, Inc.. AssistCall is an independent product of Starling Global LLC and is not affiliated with, endorsed by, sponsored by or approved by RingCentral, Inc..

More Business phone systems and carriers integrations

• AT&T Business: AT&T's business wireless, fiber and phone service, which many small businesses use for the mobile or landline number printed on their trucks, cards and listings.
• Comcast Business: Comcast's internet and business phone service (Business Voice and VoiceEdge) for offices, shops and restaurants in its cable footprint.
• Spectrum Business: Charter's internet, mobile and business phone service (Spectrum Business Voice) for small businesses in Spectrum service areas.
• T-Mobile for Business: T-Mobile's wireless and internet service for small businesses, often the owner's mobile number doubling as the business line.
• Verizon Business: Verizon's business wireless, internet and phone service, used by many small businesses whose main number is an owner's or staff member's Verizon mobile line.
• Zoom Phone: Zoom's cloud phone system, added to Zoom Workplace so a business can make and take calls in the same app it uses for meetings.

All product and company names in this directory are trademarks or registered trademarks of their respective owners, used only to identify systems AssistCall can send call information to or receive information from. Their use does not imply any affiliation with or endorsement by their owners. AssistCall connects using signed webhooks, the business's own API keys, automation platforms (Zapier, Make, n8n) the business sets up in its own account, and call forwarding. AssistCall does not provide one-click connectors, marketplace apps, certifications or two-way record or calendar sync, and does not sign HIPAA business associate agreements. Vendor features, plans and API access can change; information last checked October 24, 2026.