Cabling Replacement Guide
When Should a Glendale Business Replace Its Old Network Cabling?
Network cabling lasts a long time, but not forever. Outdated categories, damage from years of remodeling, and unlabeled runs left by past tenants can quietly limit your network. Here’s how to tell when your Glendale office should repair, partially upgrade, or fully replace its cabling.
How Long Does Network Cabling Last?
Copper and fiber cable don’t wear out the way computers and switches do. A properly installed cable plant, supported in pathways and protected from damage, can physically last well beyond 15 years. The real question is usually not whether the cable still works, but whether it still does what your business needs.
Cable installed in 2005 may still pass data, but it was chosen for the phones, desktops, and speeds of that era. Today’s Wi-Fi access points, PoE cameras, and cloud-heavy workloads ask much more of the same wires. Add a few tenant changes, remodels, and quick fixes, and many Glendale buildings end up with a mix of categories, damaged runs, and cable no one can identify.
At Network Cabling Company Glendale, we start every replacement conversation with testing, because the right answer depends on what’s actually in your walls, not just how old it is.
| Cable category | Rated speed | Typical recommendation |
|---|---|---|
| Cat3 | Up to 10 Mbps | Replace. Suitable only for legacy phone lines. |
| Cat5 | Up to 100 Mbps | Replace. Can’t reliably support gigabit connections. |
| Cat5e | 1 Gbps to 100 m | Test and evaluate. Often fine for desks, but a poor fit for multi-gigabit access points. |
| Cat6 | 1 Gbps to 100 m; 10 Gbps to about 55 m | Keep if it passes certification; upgrade access point runs to Cat6A. |
| Cat6A | 10 Gbps to 100 m | Keep if it passes certification and is well documented. |
Signs It’s Time to Replace Your Cabling
Some problems show up as slow connections or dropped calls. Others show up only when you open the ceiling or the network closet. Any of these is a strong reason to have your cabling tested and evaluated.
When performance is the main concern, it helps to understand exactly how cable limits speed, Wi-Fi, and call quality before deciding what to replace. Our guide on how upgrading network cabling can improve business internet performance walks through the symptoms and how to confirm whether cabling is the bottleneck.
Warning signs
- Desks or devices that link at 100 Mbps on gigabit equipment.
- Connections that drop, reconnect, or slow down at random.
- Wi-Fi that stays slow even after adding access points.
- Cameras or access points that reboot or lose power.
- Cat3 or Cat5 cable anywhere in the plant.
- No labels, no records, and no one who knows where runs go.
- Cable resting on ceiling tiles or damaged by past construction.
- Old, abandoned cable crowding ceilings and pathways.
The Best Times to Replace Cabling
Replacing cabling costs the least and disrupts the least when it’s done alongside other work. These are the moments Glendale businesses most often use.
| Trigger | Why it’s a good time |
|---|---|
| Moving into a new space | Inherited cable from past tenants is often unlabeled, untested, or the wrong category. Replacing it before move-in avoids problems on day one. |
| Tenant improvement or remodel | Ceilings and walls are already open, so new runs are faster and cheaper to pull. |
| Wi-Fi 6E or Wi-Fi 7 upgrade | New access points need Cat6A runs to reach their full uplink speed. |
| Adding cameras or access control | PoE devices need runs sized and tested for their power needs. |
| Switch or network refresh | Multi-gigabit and 10 Gbps switches can’t deliver their speed over outdated cable. |
| Failed certification tests | Test results show which runs are holding the network back. |
| Lease renewal or building purchase | A longer stay means a new plant pays for itself over more years. |
A note on older Glendale buildings
Glendale has a wide mix of commercial buildings, from Brand Boulevard and downtown towers to older low-rise offices and storefronts along Central Avenue, San Fernando Road, and Colorado Street. Older buildings often carry decades of layered cabling from successive tenants. High-rises add building rules, after-hours work windows, and landlord approvals. Both are reasons to plan replacement carefully rather than piecemeal.
Repair, Partial Upgrade, or Full Replacement?
Not every problem calls for a full rewire. Certification testing tells you which approach fits.
| Approach | When it fits | What it typically involves |
|---|---|---|
| Repair | Most runs pass testing; a few fail from bad jacks or local damage | Re-terminating jacks and patch-panel ports, replacing patch cords, fixing individual runs |
| Partial upgrade | Cat5e or Cat6 that tests well, but new devices need more | Cat6A to access points and cameras, a fiber backbone, and cleanup of the rack |
| Full replacement | Cat3 or Cat5, widespread failures, no documentation, or a major remodel | New structured cabling throughout, removal of abandoned cable, testing, labeling, and records |
What a Cabling Replacement Project Looks Like
- Site walk and audit. Review the rack, pathways, outlet locations, building rules, and any existing records.
- Test the existing plant. Certify a sample or all of the current runs to see what can be kept.
- Plan the new design. Choose cable categories, outlet locations, rack layout, PoE needs, and spare capacity.
- Schedule around your business. Phase the work by area and after hours so the office keeps running.
- Install and cut over. Pull, terminate, and test new runs, then move devices over area by area.
- Remove abandoned cable. Clear old, unused cable from ceilings and pathways as code generally requires.
- Hand off documentation. Deliver certification results, labels on every port, and as-built records.
Replace It With a System, Not More of the Same
Many aging cable plants became a problem because they were built one run at a time: a cable added for each new desk, printer, or camera, often by a different vendor, with no labels or records. Replacing that kind of plant with more of the same only resets the clock.
A replacement is the right time to move to a planned, standards-based system, with every run terminated on a labeled patch panel, supported in pathways, tested, and documented. To see how the two approaches compare in practice, read our explanation of the difference between structured cabling and traditional network wiring.
Frequently Asked Questions
How often should a business replace its network cabling?
There’s no fixed schedule. Well-installed cabling can last 10 to 15 years or more. Replace it when its category no longer supports your equipment, when testing shows widespread failures, or when a move or remodel makes replacement practical.
Can I keep my Cat5e cabling?
Often, for standard desks and phones, if it passes certification testing and is well documented. Cat5e is a poor fit for multi-gigabit Wi-Fi access points, so those runs are usually upgraded to Cat6A.
How do I know what category of cable I have?
The category is usually printed on the cable jacket every few feet. If it’s hidden or unreadable, a certification tester can show how the run performs against each category.
Do I have to remove old cable when I install new cable?
Code generally requires accessible abandoned cable to be removed. Removing it also frees up pathway space and makes the new plant easier to maintain.
Can cabling be replaced while the office stays open?
Yes. Work is usually phased by area and scheduled after hours, with new runs tested before devices are moved over.
Should I replace cabling before moving into a new office?
If the existing cable is unlabeled, untested, or an older category, replacing or certifying it before move-in is usually the best time, since the space is empty and there’s no one to disrupt.
Not Sure Whether to Repair or Replace?
We’ll walk your Glendale site, test your existing cabling, and give you a clear recommendation: what to keep, what to repair, and what to replace, with a written scope for the work.
Call (424) 203-4572 or request a site walk online.
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