Setting up an office network sounds technical, but the job follows a simple order. You decide what the office needs, run the cables, place the equipment, set up the firewall and Wi-Fi, then test everything before staff arrive. Skip a step and you usually pay for it later with slow Wi-Fi, dropped calls or a closet nobody can find.
This guide walks through that order for a Dallas office of about 5 to 50 people. You can do some of it yourself. Other parts are worth handing to a team that does network installation services every week, because mistakes inside walls and ceilings are expensive to undo.
Dallas adds a few local wrinkles. Many offices sit in glass towers Downtown or in Uptown, where you share risers with other tenants and need building approval for any cabling work. Others are in older brick buildings in Deep Ellum or Bishop Arts, where wiring is uneven. Summer heat also matters, because a warm closet shortens equipment life. We cover all of this below.
Start With What Your Office Actually Needs
Before you buy anything, write down how the office works. Count the people, the desks, the printers, the phones and any machines that need a wired connection. Note who works remotely and how they connect. This list drives every decision after it.
Then ask a few plain questions. How many people will you have in two years? Do you run video calls all day? Do you move large files, such as drawings, scans or video? Do you take card payments on site? A law firm in Uptown and a design studio in Deep Ellum have very different answers, and that changes how much capacity you buy.
- Headcount today and in 24 months
- Devices per person (laptop, phone, tablet, desk phone)
- Shared gear: printers, scanners, door systems, cameras, card readers
- Internet-heavy tasks: video calls, cloud apps, large uploads
- Areas that need coverage: meeting rooms, break room, reception, patio
A good rule is to plan for about double your current device count. Most people carry two or three connected devices, and that number only grows.
Choose Your Internet Connection First
Your internet service sets the ceiling for everything else. Fiber is the best choice when the building offers it, and many Downtown, Uptown and Las Colinas buildings do. Cable is common and usually fine for small teams. Fixed wireless or cellular works as a backup, not a main line.
Ask the building manager which carriers already reach the building. Getting a new carrier into a tower can take weeks, sometimes longer, because the building controls access to the risers. Order service early. Many Dallas offices lose a week of move-in time waiting on a circuit.
| Connection | Typical speed | Best for | Watch out for |
|---|---|---|---|
| Fiber | 500 Mbps to 1 Gbps or more, same up and down | Offices with video, cloud apps and large files | Install lead time, building access rules |
| Business cable | 300 Mbps to 1 Gbps down, slower up | Small offices with light upload needs | Upload speed, shared neighborhood capacity |
| Fixed wireless | 50 to 500 Mbps | Backup or places fiber cannot reach | Line of sight, weather |
| 5G/LTE backup | Varies by signal | Failover when the main line drops | Data caps, signal inside the building |
Most offices do well with one main line and one cheap backup. Texas storms and construction cuts happen, and a backup line keeps phones and payments running.
Many towers have a single telecom room where every carrier enters, so installs are scheduled with the building engineer.
Plan the Cabling Before You Plan the Wi-Fi
Wi-Fi gets the attention, but cabling does the heavy lifting. Every access point, phone, camera and desktop works better on a wired connection. Plan the cable runs first, then decide where wireless fills in.
For most offices, Cat6 is the right choice today. It handles gigabit speeds easily and costs only a little more than older cable. Run at least two drops to each desk and more to meeting rooms, so you never have to open the ceiling again. See data cabling for what a clean install includes, and Cat6 installation costs in Dallas for typical per-drop pricing.
- Walk the space. Mark every desk, printer, phone, access point location and the spot for the network closet.
- Measure runs. Keep each cable under 295 feet from the switch to the wall jack.
- Label everything. Number both ends of each cable and keep a simple map.
- Use plenum-rated cable above ceilings. Most commercial buildings require it for fire safety.
- Test every run. Each cable should pass a certification test before you accept the work.
Older buildings in Bishop Arts, Deep Ellum or the Design District often have surprises behind the walls, such as brick, old conduit or unlabeled wiring. Allow extra time for those spaces.
Set Up the Network Closet
The network closet is where cables, the switch, the firewall and the internet line come together. It can be a small room, a wall-mounted cabinet or a short rack. What matters is that it is clean, cool and locked.
Heat is the main enemy in Dallas. A closet with no airflow can pass 90 degrees in summer, which shortens the life of the equipment. Leave room for ventilation, or add a small fan or cooling unit. Put the gear on a battery backup so a brief power blip does not take down the office.
- A locked door or cabinet, not an open hallway
- Cool, ventilated space, ideally under 80 degrees
- A battery backup (UPS) for the firewall, switch and modem
- A patch panel so cables are labeled and tidy
- Enough power outlets on a dedicated circuit
- A printed network map taped inside the door
Tidy closets cost a little more up front. They save hours every time something needs to be traced or replaced.
A labeled patch panel lets a technician trace any desk to its switch port in under a minute.
Pick the Firewall, Switch and Router
The firewall is the front door of your network. Skip the consumer router from the electronics store. A business firewall gives you better control, logging and protection, and it can be monitored and updated for you. If you want that handled, look at managed firewall services.
The switch connects all the wired devices. For a small office, a managed switch with Power over Ethernet (PoE) is a safe pick, because it powers access points and phones through the same cable. Buy more ports than you need today. Adding a second switch later costs more than starting with a larger one.
| Piece of gear | What it does | Typical range for a small office |
|---|---|---|
| Business firewall | Blocks threats, controls traffic, handles VPN | $600 to $2,500, plus yearly licensing |
| Managed PoE switch (24 to 48 ports) | Connects wired devices and powers access points | $500 to $2,500 |
| Wireless access points (each) | Provides Wi-Fi coverage | $150 to $500 |
| Battery backup (UPS) | Keeps gear running through short outages | $200 to $900 |
| Rack or wall cabinet | Holds and protects the gear | $150 to $800 |
These are typical ranges. Your final number depends on office size, brand and how much support you add.
Design Wi-Fi That Actually Covers the Office
The most common complaint about a new network is weak or patchy Wi-Fi. It almost always comes from too few access points or poor placement. One powerful router in a corner rarely covers a whole floor, especially in glass or concrete buildings.
Place access points on ceilings, spread evenly, and wire each one with its own cable. Aim for coverage in meeting rooms first, since that is where video calls happen. Our page on wireless network installation explains how coverage surveys and placement work.
Keep Staff, Guest and Device Networks Separate
Create at least two Wi-Fi networks. One is for staff and company devices. The other is for guests. If you have smart TVs, printers or door systems, put those on a third network. This keeps a visitor’s phone away from your files and limits the damage if one device is compromised.
- Use a strong passphrase on the staff network
- Give guests a separate network with internet access only
- Turn off old or weak Wi-Fi security settings
- Update access point software on a schedule
- Turn down power on access points in small offices to reduce interference
Lock Down Security From Day One
A new network is the easiest time to set up security properly. Changing settings later means touching every device. Do these basics before anyone starts working.
- Change every default password. Firewalls, switches and access points ship with well-known logins. Replace them right away.
- Turn on automatic updates. Set firmware and software to update on a schedule.
- Use multi-factor sign-in. Require a second step for email, remote access and admin accounts.
- Set up a secure remote connection. Use a VPN or secure access tool instead of opening ports on the firewall.
- Limit who can change settings. Give admin access to as few people as possible.
- Back up the configuration. Save a copy of firewall and switch settings off the network.
Security is not a one-time job. Someone has to watch for alerts, apply updates and review who has access. That is why many small offices pair the build with ongoing management.
Firewall settings are saved as a backup file so the device can be replaced and restored in under an hour.
Test, Document and Hand Off
A network is not done when the lights turn green. Testing catches the problems that otherwise show up on Monday morning when everyone is working. Walk the whole office with a laptop and phone and check speed, signal and call quality in every room.
- Run a speed test at a wired desk and in each meeting room
- Check Wi-Fi signal in corners, stairwells and the break room
- Make a test video call from the farthest room
- Print from every area to each printer
- Pull the power on the main internet line and confirm the backup connects
- Confirm the battery backup holds the gear for several minutes
Then write it down. Keep a simple document with the network map, passwords stored in a password manager, internet account details, device models and warranty dates. When something breaks at 4 p.m. on a Friday, that document saves time and money.
If you are also changing locations, read the office relocation IT checklist to line up internet orders and cutover dates, and see office move IT services for help running the move itself.
Common Mistakes to Avoid
- Ordering internet too late, then moving in with no connection
- Running only one cable per desk and having no spares
- Putting the network closet somewhere hot, wet or unlocked
- Buying a consumer router to save a few hundred dollars
- Covering the office with a single access point
- Leaving default passwords in place
- Skipping the written network map
- Forgetting a backup internet line
Most of these cost little to avoid. They cost a lot more to fix once the walls are closed and the staff are in.
A good office network is mostly planning. Know what your team needs, order the internet early, run the cables right, cover the space with Wi-Fi, and lock down security before day one. Test everything and write it down. Do that, and the network fades into the background, which is exactly where it should be.
If you would like a second set of eyes, a free IT assessment is a calm place to start. You will get a plain-English review of your space and a written quote, with no pressure to commit.
FAQs
How long does an office network setup take in Dallas?
A small office of 10 to 30 people usually takes one to three days on site once the plan, equipment and internet service are ready. The slower parts are the internet order and building approvals, which can take several weeks in towers Downtown or in Uptown.
How much does it cost to set up an office network?
Most small offices spend a few thousand to tens of thousands of dollars, depending on cabling, access points and gear. Cabling is often priced per drop, while firewalls, switches and Wi-Fi are priced by quality and size. A written quote after a site visit is the reliable way to know.
Do I need a wired network or is Wi-Fi enough?
Use both. Wired connections are faster and more reliable for desktops, phones, printers and access points. Wi-Fi covers laptops, tablets and phones. An office that relies only on Wi-Fi tends to have dropped calls and slow file transfers when it gets busy.
Can I set up the network myself?
You can handle simple tasks like plugging in a firewall and naming a Wi-Fi network. Cabling inside walls, closet layout, security settings and Wi-Fi design are better left to a professional, since errors are hard to see and costly to fix after move-in.
How many access points does my office need?
It depends on size, walls and the number of users, not just square footage. A small open office may need one or two. A floor with glass walls and many meeting rooms may need four or more. A coverage survey gives a more accurate count than guessing.
What internet speed should a small office have?
Many offices of 10 to 30 people do well with 500 Mbps to 1 Gbps, especially with cloud apps and video calls. Upload speed matters as much as download speed. Fiber usually gives matching speeds in both directions, which helps with cloud backups and calls.
Do I need a backup internet connection?
Most offices should have one. A cellular or second wired line keeps phones, payments and cloud apps running when the main line drops. It is usually a small monthly cost compared with the revenue lost during an outage.
Who owns the network gear and passwords?
You should. Make sure the firewall, switches and access points are bought in your company’s name, and that you hold the admin logins and network map. This keeps you in control if you ever change IT providers.
Should I separate guest and staff Wi-Fi?
Yes. A guest network keeps visitors away from your files and devices and limits damage if a guest’s phone is infected. It is a standard feature on business equipment and takes only a few minutes to set up.
When should I bring in an IT company?
Bring one in during planning, before you order internet or sign a lease buildout. Early advice helps with cable counts, closet space and power, which are hard and expensive to change later.
Caleb Whitaker
Editorial Director, Byte Dallas
Caleb runs the Byte Dallas editorial desk and turns what our technicians see every week, from hail-season outages to office moves along the Tollway, into straight answers for Dallas business owners. A Dallas native, he has worked in IT services for more than 15 years, first answering help desk calls and later leading network and support projects for accounting firms, clinics and distributors across North Texas. He holds Microsoft 365 and CompTIA Security+ certifications. These days he spends much of his time on practical AI, such as Microsoft Copilot, and on how small teams can use it without exposing client data. Every guide he publishes is reviewed by a working technician first.