AI call routing decides where a call goes from what the caller says, not from a button they press. The speech is transcribed, matched to an intent with a confidence score, and a rule sends the call to a person, an answer or a message. For a small business a phone tree is enough when callers fit two or three buckets; AI routing earns its cost when they do not.
Key takeaways
- Nearly every guide to AI call routing is written for contact centers with queues and agents. A three-person office has three real options: a phone tree, a ring group, or AI routing.
- A keypress is a lookup and always lands in the same place. Speech is a classification with a confidence score from 0 to 1, so AI routing needs a fallback for when it is unsure.
- In a 2019 Vonage survey of 2,010 US consumers, the top complaint about phone menus was that the reason for calling was not listed, at 65 percent.
- Menu routing is included in most small business phone plans, from about 15 to 25 dollars a month per user or line, as of September 2026.
What is call routing?
Call routing is the set of rules that decides where an incoming call goes. Twilio defines it as sending voice calls to a specific queue based on predetermined criteria, and most vendors describe two parts: a menu that asks why you are calling, and a distributor that assigns the call to someone. Routing is not the same as forwarding. RingCentral draws the line well: forwarding sends a call to one other number, routing picks a destination for each call.
Those definitions assume a call center. In a small real estate office, the queue is your cell phone, the agents are you, your assistant and the maintenance contact, and the routing question is simple: should this call ring Maria, the office line, or the after-hours plumber?
The call routing types, in plain words
| Type | What the caller experiences | Who it suits |
|---|---|---|
| Direct | A separate number rings a separate person | Agents with their own lines |
| Sequential (fixed order) | Rings one person, then the next | Floor duty, a small team with a clear first call |
| Ring group (simultaneous) | Everyone's phone rings; the first to answer takes it | An office where anyone can help |
| Round robin | Calls rotate across the team | Lead rotation between agents |
| Time-based | Different rules for open, closed and holiday hours | Everyone, for nights and weekends |
| Menu (IVR or auto attendant) | Press 1 for leasing, 2 for maintenance | Callers who already know what they need |
| Intent-based (AI) | Says what they want; the system decides | Callers whose reason does not fit a menu |
Phone tree, ring group or AI routing: the three options a small office has
None of the pages ranking for this topic compare the options a small office actually chooses between. Here they are side by side.
| Phone tree (menu) | Ring group | AI routing | |
|---|---|---|---|
| What the caller hears | A recorded menu of options | Ringing | A voice asking how it can help |
| Who decides where it goes | The caller, with a keypress | Whoever picks up first | The system, from what the caller says |
| When nobody answers | Voicemail | Voicemail | It can answer the question, book, or take a message |
| Setup | Record prompts, map buttons | Add phones to a group | Write rules in plain sentences, set a fallback |
| Typical cost | Included in most phone plans | Included in most phone plans | A separate plan, per minute or per call |
| Where it breaks | The reason is not on the menu | Everyone assumes someone else got it | An unclear request with no fallback |
What AI call routing actually decides
This is the part the vendor guides skip. When a caller presses 2, the system looks up what 2 means. The answer is the same every time. When a caller speaks, three things happen instead.
- 1
The speech becomes text
Twilio's Gather can collect speech, keypresses, or both, and returns the transcript along with a confidence score between 0.0 and 1.0. - 2
The text is matched to an intent
Google's Dialogflow compares the input to training phrases and scores each possible intent. "Someone needs to look at my water heater" and "maintenance" land on the same intent without you listing every wording. - 3
A threshold decides
If the best score clears the threshold, the call follows that intent's rule. If nothing clears it, Dialogflow triggers a no-match, and the system needs a fallback: ask again, take a message, or transfer to a person.
Newer AI receptionists skip the intent list and take routing rules written as sentences. Retell's own example reads like an instruction to a person: if the caller wants support, transfer to one number; if they want sales, transfer to another. callflo.ai works the same way: you write when to transfer, to whom, and what to do instead, by caller type, property or urgency.
Why callers get stuck in phone trees
A menu can only list the reasons you predicted. In a 2019 Vonage survey of 2,010 US consumers, the most common complaint about phone menus was that the reason for calling was not listed (65 percent), followed by irrelevant options (63 percent). Respondents said they abandoned 27 percent of calls because they reached a menu. It is a vendor survey from a company that sells alternatives, and it is from 2019, so treat the numbers as direction, not measurement.
Real estate makes the problem sharper, because callers sort by role, not by department. A tenant with a leak, a renter asking about a listing, a vendor confirming a job and an owner asking about a statement all dial the same number. "Press 1 for sales" fits none of them.
Hear AI routing sort a tenant from a renter
Call callflo.ai's own AI agent and ask it anything about your business. When you are ready, pick a plan: no setup fee, no contract, and you do not pay unless you are satisfied.
Starter is $39 a month on annual billing. Live on your line about 5 minutes after you sign up.
When a phone tree is enough
A menu plus a ring group is cheaper and perfectly fine when three things are true: callers fit two or three stable buckets, call volume is modest, and someone can answer during business hours. Menu routing comes with most small business phone plans, as of September 2026:
- Google Voice Standard: 20 dollars per user a month, with a multi-level auto attendant and ring groups.
- Nextiva Core: 15 dollars per user a month on an annual plan, 23 monthly, with auto attendant and call menus.
- Dialpad Standard: 15 dollars per user a month on an annual plan, with routing and an auto attendant in Dialpad Connect.
- Grasshopper Solo Plus: 25 dollars a month on an annual plan, 32 monthly, for unlimited users.
Add conditional forwarding on your cell so unanswered calls roll to the system. On Verizon, *71 plus the number forwards only the calls you do not answer, and *73 turns it off.
When AI call routing earns its cost
- The reason for calling does not fit a menu. A buyer who saw a sign, a seller who got a mailer and a tenant with a question about their deposit all need different things, and none of them know which button that is.
- Callers need an answer, not a transfer. Is the unit still available, when is the open house, what is the pet policy. AI routing can answer those and route only what needs a person.
- Routing depends on who and when. A tenant emergency at 11pm goes to the on-call phone; a prospect at 11pm gets a tour booked for tomorrow.
- Nobody is free to answer. A ring group routes to people. If the people are at showings, it routes to voicemail.
The brokerage routing post covers lead rotation and floor duty for bigger offices, and the property managers page shows tenant and prospect routing on one leasing line. If you are deciding whether to retire the menu entirely, read IVR vs AI phone agent.
Setting up AI call routing without a contact center
- 1
Keep your number
Forward it on no answer, after hours, or always. The keep-your-number guide has the carrier codes. - 2
Name the buckets
List the four or five kinds of caller you get: prospects, tenants, vendors, owners, and the calls you never want. - 3
Write the rules as sentences
"If a tenant reports water, gas or no heat, transfer to the on-call phone. If a prospect asks about a unit, answer from the listing and book a tour." - 4
Set the fallback
When the request is unclear, ask once more, then take a message or transfer to a person. Never a dead end. - 5
Test it from an unknown number
Call as each kind of caller, then read the transcripts. The testing guide has a week-long plan.
callflo.ai handles routing as part of answering: it answers the call, works out who is calling and why, answers or books what it can, and transfers by your rules. Plans start at 39 dollars a month on annual billing, on the pricing page.