Call routing
Call routing is the process of sending each incoming phone call to the right destination, such as a person, a team, a voicemail or an AI voice agent, based on rules like the time of day, the caller's number, the skill required or what the caller says they need.
What is the difference between call routing and call forwarding?
Call forwarding sends every call to one other number. Call routing chooses a destination for each call by applying rules, so two callers who dial the same number can end up with different people. A business with a single phone line and a mobile it forwards to is using forwarding. A business that sends invoice questions to accounting, service questions to the workshop and everything after 5 p.m. to an answering service is using routing.
What are the main types of call routing?
Most phone systems combine several methods. The table shows what each one decides on and where it breaks down.
| Method | Routes the call by | Works well for | Weak spot |
|---|---|---|---|
| Time-based | Clock and calendar | Opening hours, after-hours rules, holidays | Does not know what the caller wants |
| Skills-based | Agent skill or language | Teams with specialists | Needs someone with that skill to be free |
| Round-robin or ring-all | Rotation, or all phones at once | Small teams on a shared number | The call still rings out if everyone is busy |
| Number or location based | Dialed number or caller area code | Multi-site businesses, separate lines per brand | Where a caller is says little about the need |
| Menu-based (IVR) | Key press ("press 2 for service") | A few stable, clearly separate options | Callers hang up on long menus or pick the wrong key |
| Intent-based (AI) | What the caller says | Open requests across many topics | Needs clean handoff rules and system access |
How is AI call routing different from an IVR menu?
A traditional IVR asks the caller to translate a problem into a menu choice. AI call routing lets the caller describe the problem, then classifies the request and acts on it. The same technology powers a full voice agent, so the system does not have to stop at routing. It can answer the question, book a time or take a message, and pass the call on only when a person is needed. The longer comparison is in the entry on conversational IVR.
Voice agent vs. conversational IVR vs. chatbot vs. human agent
Call routing is one step of handling a call. This table compares a voice agent, a conversational IVR, a chatbot and a person.
| Input | Handles unscripted speech | Books / acts in systems | Typical use | |
|---|---|---|---|---|
| Voice agent | Spoken, over the phone | Yes | Yes — calendars, CRMs, ticketing | Complete inbound and outbound calls, end to end |
| Conversational IVR | Spoken, over the phone | Yes, to identify the request | Sometimes — lookups and simple bookings | Replacing press-1 menus: understanding and routing the call |
| Chatbot | Typed text, in a web or app window | Yes, within its trained scope | Varies with its integrations | Self-service support on a website or in an app |
| Human agent | Spoken, over the phone | Yes | Yes, manually | Judgement calls, disputes, sensitive conversations |
What should happen when nobody is free to take the call?
Routing rules only help if there is somebody at the end of them. A missed call usually means a lost customer, so the fallback matters as much as the first rule. A sensible order is the phone first, then WhatsApp, then text and email:
| Step | What happens | Why it works |
|---|---|---|
| 1. Phone | An AI voice agent answers, finds out what the caller needs and resolves it or collects the details | The caller gets an answer on the same call |
| 2. WhatsApp | A confirmation goes out right after the call, and the caller can reply with photos or documents | The thread stays open for the next question |
| 3. SMS | A short text for callers who do not use WhatsApp | Reaches any mobile number |
| 4. Email | A summary with the caller's details goes to the right inbox | Gives the team something to file and act on |
This is the part of routing that an AI receptionist covers: it takes the call when staff cannot, and the same system follows up in writing. For evenings and weekends, see how an after hours answering service handles it.
How do you set up call routing for a small business?
- 1. List why people call. Go through a month of your call log and group the reasons. Most businesses find four to six real categories.
- 2. Give each reason a destination. A person, a team or an AI agent. One owner per category avoids calls bouncing between desks.
- 3. Add the time rules. Opening hours, lunch, holidays and what the line does after closing.
- 4. Decide the fallback. What happens when the destination is busy or does not answer. Never let the answer be silence.
- 5. Pass on context. Whoever picks up should know the caller's name and reason before saying hello.
- 6. Review the missed calls weekly. Calls that ring out or get transferred twice show you which rule is wrong.
Related industries and use cases
AI Receptionist
Sono answers every call, routes it to the right person with context, and follows up on WhatsApp, 24/7.
Learn moreConversational IVR
The routing step done by voice: callers say what they need instead of pressing keys.
Learn moreAnswering service
What happens to calls your team cannot pick up, and who takes them instead.
Learn moreAfter hours answering
Routing rules for evenings, weekends and holidays, when nobody is at the desk.
Learn more