You do not need a new phone number to use an AI receptionist. You keep the number on your business cards, your website, and your Google listing, and you tell your carrier to forward only the calls you choose — after hours, when nobody picks up, or when every line is busy — to the receptionist's number. The whole change takes about ten minutes, it is reversible in seconds, and your daytime front desk keeps working exactly as it does today.
This guide walks through the three forwarding modes, how to set each one up on a typical business line, and how to test it before a real customer hits it.
The three kinds of call forwarding
Every carrier and phone system offers some version of these three:
Unconditional forwarding. Every call goes straight to the forwarding number. Your own phones never ring. This is what you want for a line nobody staffs, such as a dedicated after-hours number or a marketing number on a billboard.
No-answer forwarding. Your phones ring first. If nobody picks up within a set number of rings (usually four to six), the call forwards. This is the most common setup for a small office: staff take the call when they can, and the receptionist catches the rest.
Busy forwarding. If every line is in use, the new call forwards instead of getting a busy signal or a hold queue. This matters most for offices with one or two lines and bursts of calls, such as a dental front desk at 8 AM or a plumbing dispatcher during a cold snap.
Most offices turn on no-answer and busy together and leave unconditional forwarding off. That way the AI receptionist is invisible during the day and simply becomes the thing that answers when nobody else does.
Scheduling: "after hours" without touching the phones every evening
There are two ways to make forwarding follow your hours.
The first is to change nothing on your phones and let the receptionist's side handle the schedule. With TelAI, no-answer forwarding is always on, and the agent knows your business hours. Its greeting, its questions, and what counts as "urgent" adjust automatically depending on whether the office is open, closed, or on a holiday. During the day it says "the team is on another call"; at night it says "the office is closed" and tells the caller when to expect a callback.
The second is time-of-day forwarding at the carrier or phone system. Many VoIP systems (RingCentral, Ooma, Grasshopper, Google Voice for business, 8x8, Nextiva) have a business-hours rule that forwards everything outside your schedule. Traditional landlines usually do not have this, which is why most landline offices use the first approach.
Either works. The first is simpler because there is only one place the schedule lives.
Setting it up on a landline or mobile carrier
On a traditional landline or a cell phone, forwarding is usually turned on with a short star code dialed from the phone itself. The exact codes vary by carrier, so check your carrier's support page or call them, but the pattern is the same everywhere:
- Pick up the handset and dial the activation code for the forwarding type you want (unconditional, no-answer, or busy).
- Dial the receptionist's ten-digit number when prompted.
- Wait for the confirmation tone or message, then hang up.
- To turn it off, dial the matching deactivation code.
Write the codes on a sticky note by the phone. If the office ever needs to pull the receptionist out of the loop for a day, a five-second dial does it.
Setting it up on a VoIP or cloud phone system
If your office already uses a cloud phone system, forwarding lives in the admin dashboard rather than on the handset:
- Open the settings for the main business number (sometimes called the "auto-receptionist," "call handling," or "call flow").
- Find the rule for unanswered calls. Set it to forward to an external number instead of voicemail.
- Enter the receptionist's number and, if the system asks, set the ring count before forwarding to four or five rings.
- Find the rule for busy calls and do the same.
- If your system has a business-hours schedule, decide whether you want the receptionist to handle after-hours through forwarding or through its own schedule (see above), and avoid doing both.
One setting worth checking: some systems have a "ring all devices" or "simultaneous ring" option. If the receptionist's number is added as a simultaneous ring target rather than a forwarding target, it may answer at the same time as your staff. You want forwarding, not simultaneous ring.
Caller ID and what the receptionist sees
When a call forwards, the receptionist sees the original caller's number, not your office number, on nearly all modern carriers. That is what lets the intake brief include the caller's phone number even if they never say it out loud. If your carrier is one of the few that replaces the caller ID with your office number on forwarded calls, the agent simply asks the caller for a callback number, which it does anyway as a confirmation step.
The number you forward to
TelAI gives each office its own dedicated local number to forward to. It is not shared with any other business, so your greeting, your FAQs, and your intake questions are the only ones on that line. The number is yours for as long as the account is active and is shown in your portal from day one of setup.
Testing before a real customer does
Set aside five minutes and run this checklist:
- Call your main line from a cell phone during business hours and do not answer. After four to six rings, you should hear the receptionist's greeting, not voicemail.
- Call again while someone is on the other line. You should hear the greeting right away, not a busy signal.
- Give it a realistic call. Ask about hours, ask for an appointment or an estimate, leave a name and number. Then check the office inbox for the intake brief and the transcript. Confirm the caller ID matches the phone you called from.
- Call once after hours. Confirm the greeting says the office is closed and sets a callback expectation.
- Turn forwarding off and call once more. Confirm your voicemail comes back. Then turn it on again.
If any step fails, the most common causes are a wrong forwarding number, a ring count set too high, or a phone system rule that still points unanswered calls at voicemail.
Porting: when you want the receptionist to own the number
A few offices prefer to move their number to the receptionist provider entirely, so there is no carrier in between. This is called porting and it is possible, but it is a bigger change: it takes one to three weeks, it means the receptionist becomes the first stop for every call, and undoing it means porting again. For most offices, forwarding gets the same result with none of that risk, so we recommend starting there.
Frequently asked questions
Will my existing voicemail still work? Yes, if you leave unconditional forwarding off. Calls only forward when nobody answers or every line is busy. If you would rather callers never reach voicemail at all, the receptionist replaces it.
Does call forwarding cost extra? Most carriers include forwarding in a business line at no charge. Forwarded minutes may count against your plan's minutes on some mobile carriers, so check yours. On the TelAI side, forwarded calls count toward your included monthly minutes like any other call.
Can I forward only certain hours? Yes. Either use your phone system's business-hours rule, or leave forwarding on all the time and let the receptionist's own schedule change how it greets and handles callers. Most offices choose the second.
What happens if my internet goes down? Forwarding happens at the carrier, before the call reaches your office. If your internet or VoIP system is down, calls still reach the receptionist. Many offices consider this a side benefit.
Can I set the receptionist to forward calls back to a human? Yes. The office can turn on human handoff in the portal and choose a number. When a caller asks for a person or reports a real emergency, the receptionist transfers the call to that number.
Hear it answer a forwarded call yourself. Dial the live demo at (213) 752-9794, then let us set up forwarding for your office — setup is $49, the first month is free, and you keep your number throughout.