The power is out and the internet is down: keeping a DFW office's phones answered

Your phones can stay up even when the office does not

With a cloud phone system, your phone service does not live in your office, so a power or internet outage at the building does not have to stop calls. The key is setting up, in advance, where calls go when the office is unreachable: typically to staff cell phones through the mobile app, to another office, or to a set of people who can answer from home. Install the app, decide who covers, configure the failover and test it on a calm day, and a storm becomes an inconvenience rather than a day when clients cannot reach you.

I am Beau Bearden, Channel Sales Manager at Cleod9 Voice, a unified communications company in Arlington. North Texas weather gives every office a reason to think about this, and the businesses that handle outages best are simply the ones that planned for them. Here is how that plan comes together.

What actually fails when the lights go out

When an office loses power, everything inside it goes down together: the internet modem, the router, the network switches, the desk phones and the computers. If the business runs an older on-site phone system, the system itself is in that list, and the phones are dead until power returns and the equipment restarts cleanly.

A cloud platform is different. The phone system runs in the provider's data centers, not in your closet, so it keeps working when your building does not. Providers build in redundancy, with multiple data centers, backup power and failover, so that if one part has a problem another takes over. What your office loses is its connection to that system. Calls still arrive at the platform; the question is where the platform sends them when your desk phones are unreachable. That is something you decide ahead of time.

The North Texas weather an outage plan should expect

Offices in Dallas and across the metroplex deal with a familiar set of disruptions. Spring brings severe thunderstorms, high winds and hail that can bring down power lines. Winter occasionally brings ice storms; the February 2021 winter storm left much of Texas without power, and many businesses learned in a single week how dependent they were on the building being open. Summer heat strains equipment, and construction across a growing region regularly cuts buried internet lines.

None of these is predictable to the day, which is the point. An outage plan that only works when someone remembers to switch it on at the right moment will fail. The goal is a setup that reroutes calls on its own and staff who already know what to do.

It also helps to separate the two kinds of outage. A power cut takes down everything in the building at once. An internet outage is quieter: the lights and computers stay on, but calls and anything else online stop. Both send calls down the same failover path, but an internet outage is easier to miss, because the office looks normal while calls are no longer reaching the desks. Automatic failover covers both without anyone needing to notice.

Set up the outage plan before the storm

These steps take an afternoon and turn a potential lost day into a manageable one:

• Decide who answers calls when the office is offline, usually the front desk plus one or two backups
• Install and sign in to the mobile app for every one of those people, and confirm it works on cellular data
• Configure failover so calls ring those devices automatically when office phones are unreachable
• Record a short emergency greeting you can switch on if the office will be closed for a day
• Keep an up-to-date contact list for staff outside the phone system itself
• Ask your IT provider whether a battery backup for the modem and router, or a second internet connection, makes sense for your office

How call failover works on our system

On our platform, if power or internet fails at the office, business calls ring another device at the same time, so the call that would have gone to a silent desk phone reaches a cell phone instead. The mobile app can run on cellular data, so staff can keep taking calls, checking voicemail and replying to texts from wherever they are. Callers dial the same number and, in most cases, never know the office was dark.

Calls can also be routed to backup lines or to another office location, which matters for businesses with more than one site. And because the system is updated and maintained remotely, restoring normal routing does not depend on a technician reaching your building. When we install a system, we set this up as part of the design rather than leaving it as a feature somebody might switch on later.

For businesses with more than one location, an outage at one site is also a chance for the other to help. Calls to the affected office can be sent to the front desk at the other one, which keeps a familiar voice answering. This only works if both sites are on the same platform and the routing has been planned, which is one more reason we design multi-site systems as a whole rather than office by office.

The first ten minutes of an outage

Even with automatic failover, people need to know their part. Write a short card for the front desk and the backups, and keep a copy somewhere other than a computer that may be off. It should cover the few things that matter in the moment:

• Check that calls to the main number are reaching the backup cell phones by calling it from a personal phone
• Tell the team, by text or a group message, who is covering calls and for how long
• Switch on the emergency greeting if the office will be closed or hours will change
• Note the time the outage started, which helps later when you review the call reports
• If anyone is hurt or in danger, call 911 from a cell phone first; everything else can wait

911 when the office is dark

Emergency calls deserve their own line in the plan. The FCC's consumer guidance on VoIP and 911 warns that internet-based phone service may not work during a power outage or when the internet connection fails, and suggests a backup power supply, a traditional phone line or a wireless phone as a backup. In practice, that means every person in the office should know that if the desk phones are down, a cell phone's own dialer is the way to reach 911.

The same guidance explains that 911 calls carry the location registered with the provider, and that an out-of-date location can send a call to the wrong place. If an outage sends staff home to work for several days, make sure your system's emergency locations reflect where people actually are, and remind staff how to update theirs.

Rehearse it on a calm afternoon

A failover plan that has never been tested is a hope, not a plan. Pick a quiet afternoon and simulate an outage: unplug the office internet for ten minutes, call the main number from an outside phone, and see what happens. Does it ring the right cell phones? Can those people transfer a call or take a message? Does voicemail still arrive? Can they send a text from the business line?

Write down what went wrong and fix it, then repeat the test at least once a year and whenever staff change. The person who was your outage backup last spring may have left, and nobody updated the routing. Put this test on your yearly phone system checkup so it happens without anyone having to remember.

When the office closes and everyone works from home

A longer outage, or a day when roads are too icy to drive, turns into a remote workday. A cloud system handles this well because the softphone runs in a web browser and the mobile app runs on any phone, so staff can sign in from home and work almost exactly as they do at the office, with calls, chat, texting and video in one place.

The weak point is usually home internet, which can be fine for email and choppy for calls. If that happens, the mobile app on cellular data is often the better option for that person. My guide on why VoIP calls cut out or sound choppy explains how to tell which connection is the problem, and the guide on choosing a desk phone, softphone or mobile app for each person shows why even desk-bound staff benefit from having the app installed.

After the storm passes, look at what the calls did

Once power is back, take ten minutes to review. Call detail reporting shows how many calls came in during the outage, who answered them and whether any went unanswered. That tells you whether the plan worked and where it needs adjusting, such as one more backup person or a different ring order.

Check the office equipment too. A power surge or a hard shutdown can leave a router, switch or desk phone misbehaving for days afterward, and the symptoms often look like call quality problems. If the network side is beyond your team, a managed IT firm can help; Anthony Omini's guide on what a small office actually needs from IT support is a good starting point. We help offices across Dallas–Fort Worth build and test outage plans, and it usually starts with a short look at how calls route today.

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