What is call forwarding?

Call forwarding is a phone feature that automatically redirects an incoming call from one phone number to another. When a caller dials your forwarded number, the phone system picks up and routes the call to a different destination — without the caller ever knowing the redirection happened.

Call forwarding is the standard way businesses move their existing phone traffic to a new service (like an AI receptionist) without changing their published phone number, notifying customers, or updating business cards.

Types of call forwarding

• Unconditional forwarding — every call is forwarded immediately, regardless of state. Your phone never rings.

• Forward on busy — calls are forwarded only when your line is already in use

• Forward on no-answer — calls are forwarded after a set number of rings if you don't pick up

• Forward on unreachable — calls are forwarded if your line is disconnected or out of service

• Simultaneous ring — calls ring your main line and a forwarded number at the same time; whoever picks up first takes the call

• Conditional forwarding — a combination of the above based on rules (e.g., forward to AI during business hours, forward to voicemail after hours)

How to set up call forwarding

Setup depends on your phone provider. Most modern business phone systems (RingCentral, Nextiva, Zoom Phone, 8x8, Vonage, Webex Calling, Teams Phone, etc.) offer call forwarding in their admin dashboard. Traditional landlines and older PBX systems usually support forwarding via star codes dialed from the phone itself (for example, *72 to enable, *73 to cancel on many carriers — but the exact codes vary).

We maintain step-by-step guides for every major provider in our Call forwarding help collection.

Why call forwarding matters for AI voice agents

Deploying an AI receptionist or answering service usually means forwarding your existing business number to the AI. This lets you:

• Keep your existing published phone number

• Route specific scenarios (after-hours, overflow, specific departments) to the AI while humans still handle the rest

• Test the AI on a subset of calls before committing fully

• Roll back instantly if you ever need to — just turn forwarding off

What you need to know before forwarding

• Your business number stays with your current carrier; only the routing changes

• Caller ID information is preserved (your AI agent sees who's actually calling)

• Some carriers charge a small per-minute fee for forwarded calls — check your plan

• Forwarded 911 calls work, but emergency location data may not transfer correctly — check your E911 configuration

Related concepts

• AI receptionist — the most common destination for forwarded calls

• Call routing — broader category that includes forwarding

• Number porting — the alternative to forwarding (moving the number itself)

• E911 — the emergency-call concern with forwarded numbers

See it in action

The Receptionist Agent at 365agents is typically deployed by forwarding your existing business number — no carrier change needed. Our Call forwarding collection has step-by-step instructions for every major provider.