Network Performance Guide
How Can Upgrading Network Cabling Improve Business Internet Performance?
You can pay for a gigabit internet plan and still get slow, unreliable connections at the desk. Often the bottleneck isn’t your provider; it’s the cable inside your walls. Here’s how upgrading your cabling helps, what it can and can’t fix, and how to tell whether it’s the problem in your Glendale office.
Internet Speed vs. Network Speed
Your internet plan sets how fast data can move between your building and the outside world. Everything after the carrier’s handoff, from the router and firewall to switches, cabling, access points, and devices, is your internal network. Data from the internet has to cross all of it to reach an employee’s screen, and it can only move as fast as the slowest link.
That’s why a 1 Gbps or 2 Gbps fiber plan can still feel slow in practice. If a desk connects over an old cable that only links at 100 Mbps, or an access point sits on a damaged run, that device never sees the speed you’re paying for. At Network Cabling Company Glendale, many of the “internet problems” we’re called to investigate turn out to be cabling problems inside the building.
Upgrading cabling doesn’t change your internet plan. What it does is remove the internal bottlenecks, so your connection reaches every desk, access point, and device at full speed and without errors.
How Old Cabling Holds Your Network Back
| What you notice | Likely cabling cause | What the upgrade fixes |
|---|---|---|
| Speed tests at the desk top out near 100 Mbps | Cat5 cable, a damaged pair, or a bad termination forcing the link down to Fast Ethernet | Certified Cat6 or Cat6A links at 1 Gbps or faster |
| Connections that drop and reconnect | Loose jacks, kinked cable, or runs damaged during past construction | New, properly terminated and tested runs |
| Choppy video calls and VoIP audio | Packet errors and retransmissions from marginal cable | Clean links with lower latency and jitter |
| Slow Wi-Fi even with strong signal | Access points on old or undersized cable limiting their uplink | Cat6A backhaul supporting multi-gigabit access points |
| Cameras or access points rebooting | Long or undersized runs struggling to carry PoE power | Runs sized and tested for the device’s PoE needs |
| Slow file transfers between floors | Old copper backbone between telecom rooms | Fiber backbone with 10 Gbps or faster uplinks |
| Problems at some desks but not others | Runs over 100 m, or cable bundled against electrical lines | Proper routing, separation from power, and length control |
What Improves After a Cabling Upgrade
Full speed to every device
Certified Cat6 delivers 1 Gbps to 100 m, and Cat6A delivers 10 Gbps to 100 m. Once every run tests to its rating, desks and devices link at the speed your switches support, so your internet plan reaches the people using it.
Faster, more stable Wi-Fi
Wi-Fi 6E and Wi-Fi 7 access points can move more data than a single 1 Gbps connection. With Cat6A to each access point, those uplinks can run at 2.5, 5, or 10 Gbps, so wireless users aren’t squeezed by the cable behind the ceiling. Upgrades are also the right time to add access points where coverage is weak, each with its own dedicated run.
Clearer calls and smoother video
Voice and video are sensitive to packet loss and jitter more than raw speed. Clean, properly terminated links cut the errors and retransmissions that cause robotic audio, frozen video, and dropped meetings.
Faster connections inside the building
Cloud apps, backups, shared drives, and printers all move traffic between devices and switches. A fiber backbone between telecom rooms and floors keeps that internal traffic from competing for a narrow copper link, which matters for Glendale studios and firms moving large files every day.
Reliable power for PoE devices
Cameras, access points, phones, and door controllers that draw power over the cable need runs that can carry it without voltage drop or overheating in large bundles. Properly sized and tested cable keeps those devices online.
Why the Way It’s Installed Matters
New cable only delivers better performance if it’s installed well. A Cat6A run with a sloppy termination, a tight bend, or a bundle zip-tied against a power feed can perform worse than older cable that was installed carefully. That’s why the upgrade itself should be planned and tested as a system, not pulled one cable at a time.
A structured approach, with every run supported, separated from power, terminated on labeled patch panels, and certified with a tester, is what turns new cable into measurably better performance. It also makes future troubleshooting and changes much faster. To see what that approach delivers beyond speed, read about the benefits of professional structured cabling in Glendale, CA.
A performance-focused upgrade includes
- Cat6 or Cat6A matched to each type of connection.
- Cat6A to every Wi-Fi access point.
- Fiber backbone between telecom rooms and floors.
- Runs kept within copper’s 100 m limit.
- Separation from electrical lines and supported pathways.
- New patch panels and patch cords matched to the category.
- Certification testing and labeling on every run.
How to Tell if Cabling Is Your Bottleneck
- Test at the router first. Run a speed test from a device plugged directly into the router or firewall. If it’s slow there, the issue is your internet service or that equipment, not your cabling.
- Compare with a desk connection. Run the same test from a wired desk. A big drop between the router and the desk points to the internal network.
- Check the link speed. On the computer or the switch, look at the negotiated link speed. A port showing 100 Mbps on a gigabit switch often means a cabling fault.
- Look at switch error counters. Rising CRC or input errors on specific ports are a common sign of a bad cable or termination.
- Separate Wi-Fi from wired issues. If wired desks are fine but Wi-Fi is slow, check the access point uplink speeds and placement.
- Have the runs certified. A certification tester shows exactly which runs pass, fail, or fall short of their rated category, so you replace only what’s needed.
What Cabling Can’t Fix
A cabling upgrade removes physical-layer bottlenecks, but it isn’t a cure for every slowdown. It’s worth ruling out these other causes, too.
| Cause | What to check |
|---|---|
| Internet plan too small | Whether your bandwidth fits your headcount, cloud apps, and video use |
| Router or firewall limits | Whether its rated throughput, with security features turned on, matches your plan |
| Old switches | Whether switch ports and uplinks support 1 Gbps, multi-gigabit, or 10 Gbps |
| Wi-Fi configuration | Channel planning, access point placement, and outdated client devices |
| Network congestion | Large backups or updates running during business hours |
Should You Upgrade Part of the Plant or Replace It?
Not every performance problem calls for new cable throughout the building. Sometimes re-terminating a few jacks, replacing damaged runs, or adding Cat6A to the access points solves most of the issue. In other buildings, especially those with Cat5 or Cat5e of unknown condition, unlabeled runs from past tenants, or cable damaged by years of remodeling, replacing the plant is the faster and more economical path.
The right answer depends on the age, category, and test results of what’s already in your walls. For the specific warning signs and a practical way to make that call, see our guide on when a Glendale business should replace its old network cabling.
Frequently Asked Questions
Will new network cabling make my internet faster?
It won’t increase the speed of your internet plan, but it can make your internet feel much faster by removing the slow or faulty links between your router and your devices, so each one gets the speed you’re paying for.
Can bad cabling cause slow Wi-Fi?
Yes. Every access point connects to the network through a cable. If that run is old, damaged, or too long, the access point’s uplink is limited no matter how strong the wireless signal looks.
Is Cat5e good enough for business internet?
Cat5e supports 1 Gbps to 100 m when it’s in good condition and properly installed, but it’s a poor fit for multi-gigabit access points and has no headroom for future upgrades. Older runs of unknown condition should be tested before you rely on them.
How do I know if a cable is limiting my speed?
Check the link speed on the device or switch port. A connection stuck at 100 Mbps on gigabit equipment, or a port with rising error counts, usually points to a cabling fault. Certification testing confirms it.
Do I need fiber inside my office?
For most desk connections, no. Fiber is typically used for backbones between telecom rooms, floors, and buildings, and for any run longer than copper’s 100 m limit.
Can cabling be upgraded without shutting down the office?
Yes. Work can be phased by area and scheduled after hours, with new runs installed and tested before each area is switched over.
Find Out What’s Slowing Your Network Down
We’ll walk your Glendale site, test the existing cabling, and tell you plainly what’s causing the slowdown and what it will take to fix it, with a written scope and certification testing on every new run.
Call (424) 203-4572 or request a site walk online.
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