Glossary

AI receptionist terms, in plain English

Hi, and thanks for stopping by.

Let me guess how you got here. You've heard AI can now answer your business calls, and you thought, “Yes, please.” No more dropping what you're doing to grab the phone. No more losing your train of thought, or your afternoon, to a call that could have been handled without you.

Then you started reading, and it got confusing fast. AI receptionist, call agent, virtual assistant, answering service, IVR, LLM, webhook. Everyone seems to be using a different word for what sounds like the same thing, and nobody stops to explain.

That's not on you. There are too many choices and too much jargon.

The good news: we're going to break it all down, one term at a time, in plain English. No tech-speak, no sales pitch. By the time you reach the bottom, you'll know exactly what each term means, how they differ, and what actually matters for your business.

Ready? Let's start with the one that trips everybody up.

IVR (Interactive Voice Response)

Also called: phone menu, phone tree, auto attendant

You know the phone menu. “For billing, press 1. For appointments, press 2. To hear these options again, press 9.” That's IVR: a recorded menu that sends you down a branch for every button you press, and back to the start when you press the wrong one.

What it is not: A menu that says “Say billing” is still IVR. It listens for one word instead of a button. Say “I think I was charged twice” and it asks you to repeat yourself. An AI receptionist listens to the whole sentence and answers it.

Hear it liveSkip the menu. Talk to our AI receptionist in your browser and ask it anything, in your own words.

Why it matters: Every menu layer is another chance for a caller to hang up. An AI receptionist skips the menu and simply asks how it can help.

Answering service (and AI answering service)

Also called: call answering service, telephone answering service

An answering service is a team of people in a call center who pick up your phone when you can't and take a message. An AI answering service does the same job with AI, so it never puts a caller on hold and never calls in sick.

What it is not: A classic answering service mostly takes messages. It rarely knows your prices or your calendar, so the caller still has to wait for you to call back.

Why it matters: Callers get a real answer on the first ring instead of “I'll pass that along,” which is often the difference between a booked job and a lost one.

AI receptionist

Also called: AI phone receptionist, AI front desk

An AI receptionist answers your business phone the way your best front-desk person would: it greets the caller, answers questions about your business, books the appointment and tells you what happened. It just never takes a lunch break.

A patient calls a medical clinic's front desk (1:06).

Why it matters: Every call gets answered, day or night, without hiring another person or sending anyone to voicemail.

These four sound alike because they all answer your phone. An AI receptionist and an AI call agent are the same idea, software that talks to callers; a virtual receptionist is usually a real person working remotely; and an answering service is a call center team that mostly takes messages.

Why it matters: Knowing which is which tells you what you are paying for: a person's time by the minute, or software that answers every call at once.

Warm transfer

Also called: the secret whisper, announced transfer

A good receptionist never just throws a call at you. They ring your desk first: “Bob from Acme is on the line about the proposal. Got a minute?” That's a warm transfer, and Call Agent AI does the same thing: before it puts the caller through, it privately tells you who is calling and why.

What it is not: A cold (or blind) transfer just rings your phone. You pick up with no idea who it is, and the caller has to explain everything again.

Hear it liveHear how the AI handles a caller who needs a person. Talk to it in your browser.

Why it matters: Callers never repeat themselves, and you start every transferred call already knowing what it is about.

After-hours answering

Also called: after-hours call routing, overnight answering

After-hours answering means someone still picks up when the office is dark: nights, weekends and holidays. With an AI receptionist that someone is always awake, so the 9 PM caller gets the same help as the 9 AM caller.

Why it matters: Many people call after work. If nobody answers, most of them call the next business on the list.

Languages and regional accents

Also called: multilingual AI receptionist, bilingual answering service

Your callers don't all sound the same, so your receptionist shouldn't either. Call Agent AI speaks more than 50 languages, can switch to the caller's language, and lets you pick a familiar accent such as American, British, Australian or Indian.

Why it matters: People relax and stay on the line when they hear their own language. A bilingual receptionist costs a lot more than one setting.

Picture a receptionist who types neat notes into your customer records during every call. That's CRM integration, minus the typing: the AI writes the caller's details, what they wanted and what happens next straight into your CRM.

A homeowner calls a plumbing company that uses Jobber (0:35).

Why it matters: No more sticky notes or “who was that?” Every call ends up in the system your team already uses.

LLM (large language model)

Also called: the brain

The LLM is the brain. It understands what the caller means and decides what to say back, so the conversation feels natural instead of following a script. Call Agent AI is not locked to one brain: you can choose between different AI models.

Why it matters: The brain decides whether your caller feels understood or feels stuck in a menu.

STT (speech-to-text)

Also called: the ears

Speech-to-text is the ears. It turns what the caller says into words the brain can work with, the same way a good receptionist listens closely before answering.

Why it matters: If the ears mishear a name or a number, everything after it goes wrong. Good ears mean fewer “sorry, can you repeat that?” moments.

TTS (text-to-speech)

Also called: the voice

Text-to-speech is the voice. It turns the brain's answer back into speech, with the warmth, pace and accent you picked for your business.

Why it matters: The voice is the first thing a caller notices. A natural one keeps them talking; a robotic one makes them hang up.

Why Call Agent AI answers faster

Most AI voice agents stitch three separate tools together for hearing, thinking and speaking, and every handoff adds a pause. Call Agent AI runs all three as one unified pipeline, so there is no handoff delay.

Typical AI voice agent

Ears· · ·Brain· · ·Voice

Call Agent AI

Ears + Brain + Voice, one pipeline

Outbound campaigns

Also called: AI outbound calling

A campaign is the AI making calls for you instead of waiting for them: reminders, follow-ups or reaching out to a list. You pull the list from your CRM, pick a time, and watch the calls happen live, with every past campaign kept for later.

Why it matters: Follow-up calls that nobody had time to make finally get made.

No CRM? No problem. Upload a simple spreadsheet of names and phone numbers, and the AI works through the list one call at a time, like a very patient intern who never gets bored.

Why it matters: You can run your first calling campaign today with the spreadsheet you already have.

Calendar integration

Also called: AI appointment booking

For businesses without a CRM, the AI books straight into your calendar. You set up a free Cal.com link that syncs with Google Calendar or Outlook, and the AI only offers times you are actually free.

A client calls a salon to book an appointment (0:57).

Why it matters: Callers leave with a confirmed time instead of a promise that someone will call them back.

The old website chatbot, the one with buttons like “Track my order” and “Talk to sales,” is basically IVR for your website: a menu dressed up as a chat. A modern conversational AI agent reads what you actually typed or said and answers it.

What it is not: A button-based chatbot can't handle a question it wasn't scripted for. A conversational AI agent can.

Why it matters: Visitors who hit a dead end in a scripted bot leave. A real conversation keeps them on your site.

When the AI calls someone and reaches their voicemail, it can leave a message for you. Write the exact words you want read out, or let the AI write a fitting message on the spot.

Why it matters: A clear voicemail gets returned. Silence or a garbled message does not.

When someone calls, the AI checks the number against your CRM, like a receptionist who remembers every regular. If it's a known customer, it greets them by name and already knows who they are.

Why it matters: Returning customers feel remembered, and they skip the “can I get your name and number?” routine.

A webhook is the AI tapping another app on the shoulder the moment something happens. An order taken on the phone can land in your point-of-sale system or a Slack channel seconds after the call ends.

Palma Pasta: phone orders go straight into their point-of-sale system.

Why it matters: Your other tools learn about the call right away, with nobody copying details from one screen to another.

Nobody wants to read a 12-minute transcript to find a phone number. The data extractor skips the small talk and pulls out only the details you chose, such as name, phone, email and reason for calling, into a clean summary.

Why it matters: You get the facts you need in seconds, ready for your CRM or your team.

Post-call SMS and email

Also called: call summary text, call recap email

After every call, the AI can send a short recap by text or email. You choose who gets it: your staff, the caller, or both.

Why it matters: Your team knows what happened without asking, and the caller has the details in writing.

Every call can be recorded and saved, like a security camera for your phone line, so you can listen back to exactly what was said.

Why it matters: Recordings settle “who said what” questions and show you how the AI is treating your customers.

Call logs are the diary of your phone line. You can read every conversation as a transcript, and play the recording too if you turned recording on.

Why it matters: You can check any call in a minute instead of relying on someone's memory.

Training a new receptionist takes weeks. With Call Agent AI you upload a PDF or Word document about your business, such as prices, hours and FAQs, and the AI knows it moments later.

Why it matters: Callers get accurate answers about your business, and updating them is as easy as uploading a new file.

Website platforms

Also called: website voice and chat widget

The same AI can sit on your website as a voice and chat widget. It works with WordPress through a plugin, with Shopify through an app, and on Wix, Squarespace, GoDaddy or any site where you can paste one line of code.

Why it matters: Website visitors get the same instant answers as phone callers, on the website you already have.

The setup wizard walks you through building your AI receptionist step by step, and most businesses are live in about 20 minutes. Rather not do it yourself? We can set it up for you.

Why it matters: You don't need a developer or a week of meetings to start answering every call.

Think of it as picking your receptionist's personality. You choose the AI model, the voice and the language, and many of the models speak several languages.

Why it matters: The AI sounds like it belongs to your business, not to a software company.

Conversation-flow tuning

Also called: patience and turn-taking settings

Good receptionists know when to talk and when to wait. These settings control the AI's patience and turn-taking: how long it waits before replying, how easily a caller can interrupt it, and how it ignores background noise and its own echo.

Silence timeout
How long the AI waits after speaking before asking “are you still there?” Default 30 seconds, range 10 to 120. Set it to 0 to turn it off.
Interruption control
Presets for how easily a caller can cut in: Quick & Reactive, Balanced (the most common), Patient & Careful, or Custom.
Voice detection
A sensitivity dial. Lower picks up quieter speech but more noise. Higher needs louder, cleaner speech.
Response delay
How much audio is captured before speech counts. Lower is faster but may clip the start of what the caller says.
Wait before responding
How long after the caller stops before the AI replies. Lower is faster but may cut people off mid-thought.
Mid-sentence interruption
How long after the AI's last audio to ignore speech. Default about 300 ms, so the AI's own echo doesn't count as an interruption.
Echo prevention
Briefly mutes incoming audio after the AI speaks so it doesn't hear itself.
Minimum agent speak time
Protects the start of the AI's reply from being interrupted. Default 0.8 seconds.
Max interruptions per minute
A limit that stops a caller, or a noisy line, from interrupting endlessly.
Minimum text length
Default 8 characters. Stops a cough or a stray sound from counting as an interruption.
Confidence threshold
How sure the AI must be that it heard real words before an interruption counts.
Interruption cooldown
A short wait between noticing an interruption and acting on it.
Volume threshold (RMS)
How loud a sound must be to count, for calls made in a web browser.
Volume frames (RMS consecutive frames)
Requires the loud sound to last a moment, so a quick bang or click is ignored.
Volume cooldown (RMS cooldown)
The minimum time between two volume-based interruptions.

Why it matters: Most businesses never touch these. When a line is noisy or callers speak slowly, a small change makes conversations feel natural again.

How the five ways of answering compare

A quick side-by-side of what each one usually does. Services vary, so treat the middle columns as the typical case.

FeaturePhone menu (IVR)Old scripted chatbotAnswering serviceVirtual receptionistAI receptionist (Call Agent AI)
Who answersA recordingA website menuCall center staffA remote personAI software
Answers phone callsYesNo, website onlyYesYesYes
Available 24/7YesYesOften, sometimes at extra costUsually business hoursYes
Understands full sentencesNo, buttons or single wordsNo, buttons and keywordsYesYesYes
Many calls at onceYes, but only plays the menuYesLimited by staff on shiftOne call per personYes, nobody waits on hold
Books appointmentsNoRarelySometimes, by handYesYes, into your calendar
Transfers with contextNo, the transfer is coldNoUsually takes a messageYesYes, a warm transfer
How you usually payPhone system feesSoftware subscriptionPer minute or per callMonthly plan plus minutesMonthly plan, from $45

Now you know the words. Hear the real thing.

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