5 Signs Your Office Network Is Holding Your Team Back

Your office network is the foundation everything else runs on — email, cloud applications, phone systems, video conferencing, file sharing. When it's working well, nobody notices. When it's not, everything grinds to a halt.

The problem is that network degradation is often gradual. People adapt — they wait longer for files to transfer, they restart their laptop when WiFi drops, they move to a different room for video calls. These small workarounds add up to significant lost productivity, but because no single incident feels like a crisis, the underlying problem never gets addressed.

Here are five signs that your network infrastructure needs attention — and what to do about each one.

1. Teams and Zoom Calls Keep Breaking Up

If your team regularly experiences frozen video, choppy audio, or dropped calls on Microsoft Teams or Zoom, your network is almost certainly struggling. Video conferencing is one of the most demanding applications in terms of network requirements because it needs consistent, low-latency bandwidth in both directions.

Common Causes

• Insufficient bandwidth: A single Microsoft Teams video call uses approximately 1.5-4 Mbps. If you have 20 people in your office and half are on video calls simultaneously, that's 15-40 Mbps just for video — before you account for everything else.
• No Quality of Service (QoS): Without QoS configured on your network, video call traffic competes equally with file downloads, Windows updates, and someone streaming music. QoS prioritises real-time traffic so calls stay clear even when the network is busy.
• WiFi congestion: If everyone is on WiFi and you're using consumer-grade access points, the wireless network becomes a bottleneck. WiFi is a shared medium — the more devices connected to an access point, the less bandwidth each one gets.
• Old cabling: If your office runs on Cat5 Ethernet cable (common in buildings wired before 2005), your maximum speed is 100 Mbps — shared between all devices on that cable run. Cat5e supports Gigabit; Cat6 and Cat6a are recommended for modern offices.

What to Do

Start by testing your actual internet speed from multiple locations in the office during peak hours. Free tools like Speedtest by Ookla give a quick indication. Then compare that against your ISP contract — if you're paying for 100 Mbps and getting 30 Mbps, the issue may be with your ISP or your internal cabling. If speeds are as expected but still insufficient, you may need to upgrade your internet circuit.

For internal network improvements, configure QoS on your firewall/router to prioritise Teams/Zoom traffic. If you're on WiFi, consider upgrading to business-grade access points (UniFi, Meraki, or Aruba) that support WiFi 6/6E and can handle 30+ concurrent devices per access point.

2. File Transfers Between Offices or to the Cloud Are Painfully Slow

If copying a large file to a shared drive takes minutes when it should take seconds, or syncing to OneDrive/SharePoint crawls during working hours, you have a throughput problem.

Common Causes

• Network switch bottleneck: If your switch only supports 100 Mbps ports (Fast Ethernet) rather than Gigabit, all internal traffic is throttled. This is surprisingly common in offices that haven't updated their switching infrastructure in 10+ years.
• Upload speed limitations: Many UK business broadband connections have asymmetric speeds — 80 Mbps download but only 20 Mbps upload (FTTC). Cloud syncing relies heavily on upload speed. If multiple people are syncing to OneDrive simultaneously, you'll hit the ceiling quickly.
• DNS or routing issues: Misconfigured DNS can cause seemingly random slowdowns as devices take longer to resolve domain names. Similarly, routing problems can send traffic on inefficient paths.

What to Do

Check your switch ports — are they running at 100 Mbps or 1 Gbps? Replace any Fast Ethernet switches with Gigabit models. Check your cabling — Cat5 cable limits you to 100 Mbps regardless of switch capability. For cloud sync issues, consider a leased line or FTTP (full fibre) connection with symmetric speeds. A 100/100 Mbps leased line costs approximately £200-400/month and eliminates the upload bottleneck entirely.

3. WiFi Dead Zones Around the Office

If your team has to relocate to get a reliable WiFi signal — moving to the kitchen for a Teams call, or sitting near the router to download a large file — your wireless coverage is inadequate.

Common Causes

• Single access point: A single consumer-grade router in the server room cannot cover an entire office floor. WiFi signals are weakened by walls, floors, metal fixtures, and distance. A typical access point provides reliable coverage for about 30-50 metres in open plan, much less with walls.
• Channel interference: In busy office buildings, neighbouring WiFi networks on the same channel create interference. This is particularly problematic on the 2.4 GHz band, which only has 3 non-overlapping channels.
• Outdated hardware: Older WiFi standards (802.11n/WiFi 4 or earlier) are significantly slower and less capable of handling multiple devices than modern WiFi 6 (802.11ax).

What to Do

Conduct a wireless site survey — this maps your actual WiFi coverage and identifies dead zones, interference sources, and optimal access point placement. Based on the survey, deploy multiple business-grade access points positioned for overlapping coverage. Use a centralised WiFi management system (UniFi Controller, Meraki Dashboard, or Aruba Central) to manage channels, power levels, and roaming between access points automatically.

As a rough guide: plan for one access point per 20-30 users or per 100-150 square metres, adjusted based on wall construction and floor layout.

4. Network Keeps Going Down — Even Briefly

Intermittent network outages — even lasting just 30 seconds — are incredibly disruptive. They disconnect VoIP calls, interrupt file saves, drop VPN sessions, and force cloud applications to re-authenticate. If someone says "the internet went down again" more than once a month, you have a reliability problem.

Common Causes

• Failing hardware: Switches, firewalls, and access points degrade over time. A firewall that reboots due to an overheating processor or a switch with a failing power supply can cause brief but repeated outages.
• IP address conflicts: If two devices are assigned the same IP address (common with poorly managed DHCP), intermittent connectivity issues occur for both devices.
• ISP issues: Your broadband provider may have intermittent problems on your line. Check your router logs for line drops — if you're on FTTC, these are recorded as DSL sync losses.
• No redundancy: If your entire office depends on a single internet connection and a single router, any failure in either means total loss of connectivity.

What to Do

Implement network monitoring using tools like PRTG, Datto RMM, or even free options like Uptime Kuma. These tools monitor your network devices and internet connectivity, alerting you (or your IT provider) when issues occur — often before users notice. For critical environments, consider a secondary internet connection (4G/5G failover) that activates automatically if your primary connection drops.

5. Your Team Has Grown but Your Network Hasn't

The network that worked perfectly for 10 people doesn't scale linearly to 30. Most office networks are designed for a specific user count and usage pattern. When the business grows — more people, more devices, more cloud applications, more video calls — the network that was "fine" becomes a bottleneck.

Warning Signs

• You've added staff but haven't added network capacity (switches, access points, internet bandwidth)
• People are plugging desktop switches under their desks because there aren't enough wall ports
• Your firewall is more than 5 years old and was spec'd for a smaller team
• You're running out of IP addresses in your DHCP scope
• The internet "slows down" noticeably between 10am and 12pm when everyone is working

What to Do

Treat your network as infrastructure that needs capacity planning — just like office space. When planning growth, factor in: one Gigabit switch port per desk, WiFi capacity for at least 1.5x your headcount (to account for phones and tablets), internet bandwidth of at least 5-10 Mbps per user for cloud-heavy workloads, and a firewall rated for your actual user count (check the vendor's datasheet for maximum concurrent sessions and throughput).

Don't Ignore the Foundation

Your network is the single piece of infrastructure that affects every person and every application in your business. A poorly performing network doesn't just cause frustration — it directly impacts productivity, client relationships (nobody wants to be the person with a choppy video call), and your ability to use modern cloud-based tools effectively.

The good news is that most network problems are fixable with targeted improvements rather than a complete overhaul. A proper network assessment identifies the specific bottlenecks, and a prioritised upgrade plan addresses them in order of impact.