Integrations / Business phone systems and carriers

Use AssistCall with Vonage Business Communications

Keep your Vonage Business Communications 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.

Vonage Business Communications: Vonage's cloud phone system for small and mid-size businesses, with desk phones, a desktop and mobile app, and a virtual receptionist.

Connects

Example call

A patient calls a physical therapy clinic's Vonage number on Saturday. The Virtual Receptionist's after-hours schedule sends the call to AssistCall, which books a Monday evaluation and emails the clinic the summary.

• Add an after-hours schedule to your Vonage Virtual Receptionist that sends calls to your AssistCall number, so evening and weekend callers are answered.
• Add AssistCall as the last number in a Follow Me or Never Miss a Call sequence so calls nobody picks up reach the receptionist instead of voicemail.
• Turn on Forward All Calls to AssistCall with Originating Caller ID during a staff meeting or day off, and read each call summary by email afterwards.

How it connects

• Call forwarding: Forward your business line to AssistCall when busy, after hours or always. Works with any carrier.

About Vonage Business Communications's API

• API access not confirmed
• Style: REST (Vonage Business Communications APIs)
• Authentication: OAuth 2.0; access tokens expire after 24 hours and refresh tokens after 7 days
• On Zapier: no. On Make: no.

The Vonage Business Communications APIs use OAuth tokens that expire, so AssistCall can't call them live with a fixed header. Vonage's marketplace describes a Zapier app for this product, but Zapier's page for it was not found in October 2026, and Make's Vonage app covers Vonage's developer APIs, not this phone system. Forwarding: users set Settings > Call Forwarding > Forward All Calls with an outside number (choose 'Originating Caller ID' so the caller's number shows); admins use Phone System > Extensions > Call Forwarding. For after-hours routing, Vonage points to the Virtual Receptionist: a third-party guide describes adding an after-hours schedule under Phone System > Virtual Receptionists > Schedules & Call Flows and sending calls to an outside number. Never Miss a Call and Follow Me can ring several numbers in sequence.

Not included: no one-click Vonage Business Communications app, no listing in Vonage Business Communications's marketplace, no two-way sync, and no partnership with Vonage (an Ericsson company).

Researched by the AssistCall team and checked against Vonage (an Ericsson company)'s public pages on October 24, 2026. Vonage Business Communications is a trademark of Vonage (an Ericsson company). AssistCall is an independent product of Starling Global LLC and is not affiliated with, endorsed by, sponsored by or approved by Vonage (an Ericsson company).

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

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.