Business Line Call Forwarding: How It Works and Your Options

Call forwarding redirects incoming calls from your business line to a different destination number. The caller dials your normal business number and never sees the destination. This is useful when you are out of the office, when you want calls answered after hours, or when you want an answering service to pick up calls you cannot take.

Forwarding is a feature of your phone service, not a new phone number. You keep the number customers already have, and you can usually turn forwarding on and off whenever you want. Most providers handle it with short dial codes or a setting in an online account or app.

• Your business number stays the same for callers.
• Forwarding can usually be turned on and off at any time.
• The destination can be a cell phone, another office line, or an answering service.
• Some providers charge for forwarded minutes depending on your plan, so check with your carrier.

All-call forwarding (sometimes called unconditional or immediate forwarding) sends every incoming call straight to the destination. Your desk phone does not ring at all. This is what you want when the office is closed or you want an outside service to handle everything for a while.

Conditional forwarding only redirects calls in certain situations. The common conditions are: no answer (the line rings a set number of times, then forwards), busy (you are already on a call), and unreachable (the phone is off or out of service). Conditional forwarding lets your line ring normally first, which is a common setup for after-hours or overflow coverage.

One thing to know: all-call forwarding usually overrides voicemail on the original line, and on some systems it can override hunt groups that would otherwise pass a call to other extensions. If you rely on either of those, test carefully after activating.

• All-call: every call forwards immediately; the original line does not ring.
• No-answer: the line rings first, then forwards if nobody picks up.
• Busy: forwards only while you are on another call.
• Unreachable: forwards when the phone is off or has no signal.
• All-call forwarding typically overrides the original line's voicemail.

The code you use depends on your exact service, not just the brand name. AT&T wireless, AT&T Collaborate, and AT&T Phone for Business all use different codes, for example. Identify the service name on your bill or account portal first, then use the matching instructions below. These are the procedures each provider has published for its own service.

All-call (unconditional) forwarding: Verizon mobile uses *72 plus the 10-digit destination, set up from the phone while in Verizon coverage, and *73 disables; Verizon business landline also uses *72 and *73 from the same line. T-Mobile uses **21*1 then the destination and #, disabled with ##21# (##004# resets to defaults). AT&T Phone for Business uses *72, destination, #, with *73# to turn it off; AT&T Collaborate uses *72 plus destination and *73 to disable. Comcast Managed Voice (Panasonic TPA65) uses lift handset, *72 and destination, then hang up, with *73 to disable. Optimum Business Phone uses *72, wait for dial tone, then the destination, with *73 to turn it off. Frontier Unlimited Digital Voice uses *72, wait for the second dial tone, then the destination, with *73 to disable. C Spire uses *72 plus the 10-digit number and Call, with *73 then Call to disable.

Conditional (busy or no-answer) forwarding: Verizon mobile uses *71 plus the destination for unanswered calls. T-Mobile uses **61*1 for no reply, **62*1 for unreachable, and **67*1 for busy, each disabled with ##61#, ##62#, or ##67#. AT&T Phone for Business uses *92 for no answer and *90 for busy; AT&T Collaborate uses *92 for no-answer and *62 for busy. Comcast Managed Voice uses *92 for no-answer and *90 for busy. C Spire has not published conditional codes, so confirm any no-answer feature with them directly rather than borrowing another carrier's codes.

Portal-based setup: Vonage Business Communications lets you enable Call Forwarding in account settings and choose Forward Calls to a phone number; verify with an outside test call. Spectrum Business Voice uses SpectrumBusiness.net: open Voice, choose the number, then Voice Settings or Forwarding Manager, and pick all calls or busy/no-answer with a destination.

• Identify your exact product first; codes differ even within one brand.
• All-call forwarding is usually *72 plus the destination, and *73 disables it.
• Conditional codes vary widely: *71, *92, *90, **61*, **62*, and **67* all appear across providers.
• Some services use an online portal or app instead of dial codes.
• Never substitute one carrier's codes for another's.

Forwarding usually takes a few minutes to set up, but a little preparation prevents missed calls and surprise charges. Work through this list before you activate anything.

• Identify your exact service name from your bill or account portal. Carrier instructions differ between wireless, landline, and hosted products, even within the same brand.
• Confirm the feature is included or enabled on your plan. Some providers require you to add forwarding as a feature before it works.
• Check whether forwarded minutes cost extra on your plan.
• Decide between all-call and conditional forwarding based on whether your line should still ring first.
• Test the destination by calling your business number from an outside phone after activating.
• Write down the disable code so you can turn forwarding off quickly.

The two most common destinations are your own cell phone and an answering service. Forwarding to a cell is simple and free to configure on most plans, but it means every call interrupts you, and after hours you are back to voicemail. Forwarding to an answering service means a trained voice or an AI receptionist answers with your business information, takes messages, and can book appointments, with calls, transcripts, and summaries visible in a dashboard.

AllDayDesk is an AI receptionist that answers calls around the clock using the business details you save. You keep your existing number by forwarding calls to it, using the same carrier steps above. Setup involves choosing your business or entering its website, checking the details it found, hearing a personalized sample call, and then choosing your phone setup. The sample is a demonstration and creates no real booking. New appointments go to the built-in AllDayDesk calendar once you have configured your services and availability, and an optional Google Calendar connection is available in Settings after you connect and authorize your account. If a caller asks something the service does not know, like a price that is not saved, it takes a message instead of guessing.

Note one limitation: Google Voice numbers cannot be forwarded to an automated system. Google states this forwarding is unsupported, so a Google Voice number is not a workable source line for this kind of service.

• Forwarding to a cell keeps you in control but interrupts you on every call.
• An answering service or AI receptionist answers with your saved business details and takes messages.
• AllDayDesk shows calls, transcripts, summaries, and bookings in its dashboard.
• Google Voice numbers cannot be forwarded to an automated system.

The best choice depends on who should pick up and when. If you personally answer most calls and just need coverage while you are on a job or driving, conditional no-answer forwarding to your cell is often enough. If calls come in when you cannot answer at all, or you want a consistent greeting and message taking at any hour, forwarding to an answering service or AI receptionist fits better. Some owners combine both: the line rings their cell first, and unanswered calls forward onward.

Cost is part of the decision. Human answering services typically charge monthly plan fees, and published starting prices vary by provider, so compare included minutes or calls and overage rates on a current quote. AllDayDesk plans are shown with their pricing on this site separately from this guide. Also weigh what happens to each call: with plain forwarding to voicemail, callers get a recording; with a receptionist service, callers reach something that can take a message or book an appointment.

• Mostly self-answered calls with occasional gaps: conditional forwarding to your cell.
• Calls at all hours or while you work: forward to an answering service or AI receptionist.
• Compare included minutes, overage rates, and contract terms on any current quote.
• Whatever you choose, test it from an outside phone before relying on it.