A 24 hour answering service for every call
Some lines should be answered the same way at every hour, not only when staff are busy. With Asyntai, an AI takes every call on your number, around the clock. During your staffed hours it puts callers who ask for a person through to your team; overnight it takes callback requests. You size the plan by how many calls arrive together and how many minutes the line uses in a month.
How a full-time AI answering service runs through the day
When the AI takes every call, the same agent covers a quiet 3 am and a crowded Monday morning. The answers stay the same. What changes with the clock is where a request for a person goes.
During your staffed hours
The agent answers the question first. When a caller wants a person, it says it is putting them through and transfers the call to the line's transfer number. The phone that rings shows the caller's own number. No answer in 20 seconds, or a busy line, and the agent takes a callback request.
“Can I talk to someone about a refund for last week?”
Through the night
The knowledge and the answers do not change after dark. A caller who asks for a person gives a name and a callback number, the agent repeats the number digit by digit, and the request waits in your escalation email for the first shift.
“My flight is delayed until tomorrow. Do I pay for the extra night?”
At the busiest hour
Standard answers 2 calls at the same moment and Pro answers 5. Within that number, no caller waits for another to finish. A caller above it hears that the lines are busy and is asked to try again in a few minutes.
“I'm at the terminal now. Where does the shuttle stop?”
A transcript for every hour
Each call is stored as a conversation in your dashboard with the full transcript, so the day team can read what happened overnight. Numbers and email addresses callers give can be saved as leads when lead collection is on.
“Could you hold a space for our company van every week?”
Two ways to send every call to the AI
A 24 hour answering service needs all of the calls, not a share of them. There are two simple routes. Both keep the number and the call minutes on your own Twilio account.
- Publish the Twilio numberPut it on your website, your signs and your booking emails. Every call goes straight to the agent, with no forwarding in between.
- Forward your existing line, alwaysUnconditional call forwarding from your phone provider sends every call to the Twilio number. The number printed everywhere stays as it is.
- Point transfers at the staffed deskThe transfer number of the imported line is the phone your team answers during the day: a desk line or a mobile, in international format.
One agent, two routes, switched by your Escalation hours
Escalate to Human has business hours. On a round-the-clock line, those hours are the switch between day and night. The agent answers questions the same way at any hour; only the route for a request for a person changes.
- Inside the hours: a transferThe caller is put through to the transfer number. If it rings out or is busy, the caller returns to the agent for a callback request.
- Outside the hours: a callback requestName and a confirmed number, sent to the escalation email, with the transcript in the dashboard.
- Urgent at any hour: your ruleA rule can give a number that is staffed all night, such as a duty manager or an attendant, for the cases you name.
Switch a line to round-the-clock AI answering
You need an Asyntai Standard plan or higher, a paid Twilio account and a voice-capable number. Twilio bills the number, the call minutes and each transferred leg on your account.
- Create your Asyntai account and add the website. The pages are read in a few minutes. Upload rates, terms and anything else callers ask about at night.
- Write rules that hold at every hour in the AI Instructions, including what is urgent and which number is staffed overnight. Put the greeting on the Voice Agent page and make a free test call in the browser.
- Connect Twilio on the Phone Calls page with your Account SID and Auth Token, import the number, and add the transfer number for the day team.
- Set the staffed hours under Escalation, then publish the Twilio number or turn on unconditional forwarding. Call once at noon and once at midnight.
A human 24-hour service or an AI on the line
Round-the-clock cover can come from people at an answering service or from an AI agent on your own number. These are the points to check for a line that never closes.
| Point | Human 24-hour answering service | Asyntai, every hour |
|---|---|---|
| Who answers at 3 am | Operators at the answering service | The same AI agent as at 3 pm, which says it is an AI assistant, then gives your greeting |
| A question about your business | Answered as far as your script to the service goes, or a message | Answered from your website, documents and AI Instructions |
| A request for a person by day | As your instructions to the service say | Transfer to the line's transfer number during Escalate to Human hours |
| A request for a person at night | As your instructions to the service say | A callback request with a confirmed number, by email |
| Calls at the same time | Depends on the service | 2 on Standard, 5 on Pro |
| Billing | Usually by the minute or per call | A monthly plan with included voice minutes; Twilio bills the number and call minutes |
| What the day team reads | The messages the service passes on | The full transcript of each call in your dashboard |
Answering services differ, so check the terms of any service you compare. Asyntai transfers go to the transfer number of the line that was called.
Work out the monthly minutes before you choose
A line answered at every hour uses more minutes than one that is covered only at night. Four numbers tell you which plan fits. The example figures are made up; use your own.
| Step | Where to find it | Example |
|---|---|---|
| Calls a day on the line | Your phone bill, or the call log of your phone system | 8 calls a day |
| Average call length | The same bill or log | 2.5 minutes |
| Minutes a month | Calls a day, times the average length, times 30 | 8 x 2.5 x 30 = 600 minutes |
| Voice button on the website | Add it if you switch it on; it uses the same minutes | Plus any website voice calls |
| The plan that fits | Standard includes 200 minutes, Pro includes 1,500 | 600 minutes fits within Pro |
When the month's voice minutes are used up, calls are declined with a short message until the minutes reset, so leave room for a busy month. For more minutes than Pro includes, write to [email protected].
- 200 voice minutes a month
- 2 calls at the same time
- 15,000 AI replies a month
- $125 a month billed annually
- 1,500 voice minutes a month
- 5 calls at the same time
- 50,000 AI replies a month
- $404 a month billed annually
Each answer the agent gives on a call also counts as one AI reply on the plan. Twilio bills the number and the call minutes on your own account; see Twilio voice pricing.
24 hour answering service: questions about full-time cover
For businesses that want one answer on the line at every hour of the day and night.
What makes the service 24 hour?
Every call reaches the Twilio number that the agent answers. Either you publish that number as your line, or your phone provider forwards all calls to it with unconditional forwarding. The agent then picks up at any hour, including weekends and holidays.
Does the agent act differently in the day and at night?
Its answers stay the same. The difference is a request for a person. Inside your Escalate to Human hours, that caller is transferred to the line's transfer number. Outside them, the agent takes a callback request with the caller's name and a confirmed number and sends it to your escalation email.
How many voice minutes does round-the-clock cover need?
Multiply the calls a day by the average call length and by 30. For example, 8 calls a day of 2.5 minutes is 600 minutes a month, which fits within Pro's 1,500 but not Standard's 200. Add website voice calls if the voice button is on, because they use the same minutes.
What happens if the minutes run out late in the month?
Calls are declined with a short message until the minutes reset. On a line that is meant to be answered at every hour, plan with room to spare. If you need more minutes than Pro includes, write to [email protected].
How many people can call at the same moment?
Two on Standard and five on Pro. The next caller above that limit hears that the lines are busy and is asked to call again in a few minutes. If calls on your line come in waves, such as when a flight lands or a store opens, size the plan for the wave, not the daily average.
Can my staff still take calls themselves during the day?
Yes. Callers who ask for a person during your hours are put through to the transfer number, which can be a desk line or a mobile. If it does not answer within 20 seconds, the caller returns to the agent. If you would rather have staff answer first by day, the after hours answering service setup forwards only the closed hours.
How do we keep answers right when nobody is around to check them?
Change the source, and the next call uses it. Uploaded documents and AI Instructions take effect on the next call. If a web page changes, have Asyntai read that page again. The transcripts in the dashboard show what callers were told overnight.
Can we pause the 24-hour line?
Yes. Switch the number off in Asyntai, and calls are declined with a short message. You can also change the forwarding on your own line, or remove the number, which clears its webhook.
What it takes to run a 24 hour answering service on AI
A 24 hour answering service is a different request from after-hours cover. You are not asking someone to catch the calls your team misses. You want one consistent answer on the line at every hour, whether it is a quiet Tuesday at 3 am or the first busy hour of a holiday weekend. Typical examples are airport parking, self-storage, equipment rental and travel, where customers keep odd hours. This page goes through what full-time cover looks like with Asyntai: how every call reaches the agent, how the day and the night differ, how much capacity you need, and how to plan the minutes.
The first decision is routing, because round-the-clock cover needs all of the calls. The agent answers a number in your own Twilio account, and there are two ways to send everything to it. You can publish the Twilio number as your main line, on the website, the signs and the confirmation emails, so callers reach the agent directly. Or you can keep your existing number and set unconditional forwarding with your phone provider, so every call on that line goes on to the Twilio number. In both cases Twilio bills the number and the call minutes to you, and the setup on the Asyntai side is the same: import the number on the Phone Calls page.
Next, decide what day and night mean on your line. Asyntai uses the business hours of Escalate to Human for that. Inside those hours, a caller who asks for a person hears that they are being put through, and the call goes to the transfer number of the line. The receiving phone shows the caller's own number. If nobody answers within 20 seconds, or the line is busy, the caller returns to the agent, which apologizes and takes a callback request. Outside those hours, the same request becomes a callback request straight away, sent to your escalation email with a name and a number the caller confirmed digit by digit. Set the hours to the times someone is really at the transfer number, and the switch happens on its own every evening and every morning.
Some calls cannot wait for the morning shift even on a line that is always answered. For those, write an AI Instruction that names the cases and the number to give. On an airport parking line it might be an exit gate that will not open; the rule tells the caller to press the help button on the gate, where the attendant on duty answers at any hour. A duty manager's mobile or a security desk works the same way. Because the rule is the same at noon and at midnight, write it so that it is true at both times.
Capacity matters more on a full-time line, because peaks can come at any hour. Standard answers 2 calls at the same time, and Pro answers 5. Within that number nobody waits; above it, the next caller hears that the lines are busy and is asked to call again in a few minutes. Think about the moments when calls arrive together on your line, such as several flights landing within half an hour, the morning a sale starts, or a storm that closes a road. Choose the plan for those moments rather than for the daily average.
Minutes are the other half of the plan. Standard includes 200 voice minutes a month and Pro includes 1,500. To estimate your need, take the calls a day from your phone bill or call log, multiply by the average call length, and multiply by 30. Eight calls a day at two and a half minutes comes to 600 minutes a month, inside Pro and well above Standard. If you also switch on the voice button in the website chat, those conversations use the same minutes. When the month's minutes are used up, calls are declined with a short message until they reset, so leave headroom on a line that is meant never to go unanswered. For more minutes than Pro includes, write to [email protected].
The full cost has three parts. The plan is $139 a month for Standard ($125 billed annually) or $449 a month for Pro ($404 billed annually). Each answer the agent gives on a call also counts as one AI reply on the plan, out of 15,000 a month on Standard and 50,000 on Pro. Twilio bills the number, the call minutes and each transferred leg on your own account. A human 24-hour answering service is usually billed by the minute or per call, so to compare, set its last invoice next to your minutes estimate. The page on AI receptionist cost works through more examples.
Round-the-clock answers are only as good as the material behind them, and at night nobody is around to correct a wrong one. The agent answers from your website, read page by page, from the documents you upload and from your AI Instructions, and it offers a callback request when a question is not covered. Uploaded documents and AI Instructions take effect on the next call; when a web page changes, have Asyntai read that page again. Each morning, the transcripts in the dashboard show what callers asked overnight and what they were told, which makes gaps easy to find and fix before the next night.
To start, add your website and the documents callers need, write rules that hold at every hour, and make a free test call in your browser. Then import the number, set the transfer number and the staffed hours, and switch on unconditional forwarding or publish the Twilio number. Call once at midday and once after midnight to hear both routes. The answering service overview compares other ways to cover a business phone.
Put one AI answer on your line, at every hour
Add your website, write rules that hold day and night, and make a test call. Then send every call to the agent.