Call Routing Software: A Small Business Guide to Where Calls Go

Call routing software is the part of a phone system that sends each incoming call to a destination. The destination can be your cell phone, your office line, a coworker, a voicemail box, or an outside answering service. Routing rules decide which destination gets the call and when.

Routing is different from answering. Routing moves the call; answering handles the conversation. A routing rule that sends after-hours calls to voicemail has moved the call, but nobody answered it. A rule that sends the same call to an answering service or AI receptionist means a caller hears a voice, gets questions answered, and can leave a detailed message or request an appointment.

For a small business, the practical question is not which software has the longest feature list. It is: for each kind of call, at each time of day, where should the call land, and who or what should handle it if you cannot pick up?

• Routing destinations: your own phones, voicemail, a team member, or an outside answering service
• Routing rules: always, only at certain times, or only when busy or unanswered
• Answering layer: voicemail, a human answering service, or an AI receptionist
• Visibility: a dashboard where you can review calls, transcripts, summaries, and bookings

These are the two routing patterns small businesses use most, and they solve different problems.

Time-based routing sends calls somewhere different depending on when they arrive. During business hours, calls ring your cell phone. After hours, they go to an answering service or voicemail. Time-based routing is usually configured in your phone provider's account portal, because the provider's system needs to know the schedule.

Conditional routing forwards a call only when something goes wrong with the first attempt: the line is busy, nobody answers, or the phone is unreachable. This is the pattern behind overflow coverage. You keep answering your own phone as usual, and the conditional rule only kicks in when you miss the call. Unconditional (all-call) forwarding is the third pattern: every call goes to the destination immediately, and your original line does not ring. It matters to know the difference, because activating an all-call code when you meant to set up overflow coverage will stop your phone from ringing at all.

One caution: not every phone service supports every pattern. Some carriers publish all-call forwarding codes but have not documented conditional forwarding for every product, and some devices support forwarding only in select areas. Check your own carrier's instructions for your exact service before assuming a rule is available.

• Time-based: destination changes by schedule; usually set in the provider portal
• Conditional: forwards only on busy, no answer, or unreachable; the overflow pattern
• Unconditional: every call forwards immediately; your line does not ring
• Carrier support varies by product, so confirm your exact service's options first

Most routing destinations are dumb endpoints. Voicemail records audio and waits. A forwarded cell phone just rings somewhere else. An AI receptionist is a routing destination that can actually handle the call.

With AllDayDesk, you keep your existing public phone number and forward calls to the service; the forwarding instructions depend on your phone provider. Once a call arrives, the AI receptionist answers using the business information you saved during setup. It answers common questions, takes messages, and can book new appointments into the built-in AllDayDesk dashboard calendar once you have configured your services and availability. An optional Google Calendar connection is available in Settings after you connect and authorize your Google account. It can also transfer a call to you, but only after you have configured a transfer destination and rules. Neither pickup nor an immediate response is guaranteed on a transfer, so the destination and rules you choose matter. When the AI does not know an answer, a price, or whether an appointment is possible, it takes a message instead of guessing.

Everything is visible afterward: calls, transcripts, summaries, and bookings appear in your dashboard, so you can see what happened on each routed call without listening to a voicemail box.

A note on limits: an AI receptionist is not a human. It does not give medical, legal, or financial advice, and it does not handle emergencies. If your calls need judgment calls or licensed advice, the routing rule should send those to you directly.

• Keep your existing number; forwarding instructions depend on your phone service
• Setup: choose your business or enter its website, check the details, hear a sample, then choose phone setup
• The sample is a personalized preview and creates no real booking
• New appointments go to the built-in dashboard calendar by default; Google Calendar is an optional connection in Settings
• Changes to existing appointments are requests for you, not confirmed changes

Routing setup has two halves: the rule in your phone system and the destination that receives the call. Do them in this order.

First, decide your destinations. Write down where calls should go during business hours, after hours, and when you are busy or do not answer. Most owners answer their own phone during working hours, so the common pattern is: ring me first, and route to the answering destination on busy or no answer, or route everything after hours to the answering destination.

Second, configure the destination itself before you point calls at it. If the destination is AllDayDesk, complete setup by choosing your business or entering its website, checking the business details it found, listening to a personalized sample call, and choosing your phone setup option. Configure your services and availability so booking works, and set up any transfer destination and rules you want.

Third, activate the routing rule with your phone provider. The exact steps depend on your carrier and product. Some services use star codes, such as *72 plus a destination for all-call forwarding on several carriers, while others use an online portal where you pick the number, choose all calls or busy/no-answer, and set the destination. Conditional codes differ from unconditional ones, so use the instructions for your exact service. Fourth, test from an outside phone and then turn the rule off or adjust it if needed. Most carriers use a separate code, commonly *73, to disable forwarding. Verify the call lands where you expect before you rely on it.

• Step 1: map call types and times to destinations
• Step 2: configure the destination (business details, services, availability, transfer rules) before forwarding
• Step 3: activate forwarding with your carrier's verified instructions for your exact product
• Step 4: test with a real outside call, then disable or adjust with the deactivation code
• Common deactivation code: *73 on several carriers, but confirm for your service

The same carrier can use different codes for different products, which is the most common setup mistake. A few verified examples show the pattern.

On Verizon mobile, *72 plus the 10-digit destination forwards all calls, *71 plus the destination forwards only unanswered calls, and *73 disables forwarding. Setup must be done from the mobile phone while in Verizon coverage. On Verizon business landline, the guide covers *72 and *73 for all-call forwarding; the wireless *71 conditional instructions should not be applied to a landline product.

AT&T is a clearer example of product differences. On AT&T Phone for Business, all calls use *72, no answer uses *92, and busy uses *90, each followed by the destination and #. On AT&T Collaborate, always-forward is *72, busy forwarding is *62, and no-answer is *92, with separate disable codes. Same company, different products, different codes. Portal-based services skip codes entirely: Spectrum Business Voice forwarding is managed by signing in to SpectrumBusiness.net, opening Voice, choosing the number, and enabling forwarding as all calls or busy/no-answer with a destination, and Vonage Business Communications manages forwarding in its settings by enabling forward calls to a phone number.

The lesson: identify the exact product name on your bill first, then find that product's instructions. If your carrier's conditional forwarding is not documented for your service, ask the carrier to confirm what your plan supports rather than borrowing another product's code.

• Verizon mobile: *72 all calls, *71 no answer, *73 off; from the phone itself
• AT&T Phone for Business: *72 all, *92 no answer, *90 busy, each with destination and #
• AT&T Collaborate: *72 always, *62 busy, *92 no answer, separate disable codes
• Spectrum Business Voice and Vonage Business: configure forwarding in the online portal
• Always confirm the exact product before using any code

Use these questions to build your routing rules before you touch any settings.

Who should hear the phone ring first? If you are the business, route to yourself during working hours. Most owners answer their own phone, and callers calling a small business usually want the owner. What happens when you miss a call? If a missed call means lost work, route busy and no-answer calls to a destination that answers: an AI receptionist, a human answering service, or at minimum a voicemail box you actually check. Voicemail is free but silent; an answering destination captures details and can request appointments.

What happens after hours? Time-based routing lets after-hours calls skip your phone entirely and go straight to the answering destination. Decide whether after-hours callers should hear a person or a recording, and what you promise about callbacks. Which calls must reach you personally? Emergencies, pricing negotiations, and anything needing licensed advice should route to you or become a message for you, not a conversation with a service. Configure transfer rules so the AI receptionist transfers only the calls you want transferred, and remember a transfer is not guaranteed to connect.

How will you review what happened? Pick a destination with visibility. AllDayDesk shows calls, transcripts, summaries, and bookings in the dashboard, so a routed call leaves a record you can act on.

• Business hours: ring you first; overflow to an answering destination
• After hours: time-based rule straight to the answering destination
• Sensitive calls: route to you or take a message; never let a service guess
• Transfers: configure destination and rules, and accept that pickup is not guaranteed