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We run through a rapid set of real-world low voltage questions, from multimeter cable length estimates to what your certifier’s “Level 3E” label really means. We also dig into the jobsite choices that quietly drive callbacks, disputes, downtime, and overheated equipment.

• estimating copper cable length with loop resistance and a multimeter, plus what impacts accuracy
• understanding Level 3 vs Level 3E cable certifiers and why backwards compatible is not forwards compatible
• defining the uncertainty zone and why we never accept star pass or star fail results
• troubleshooting marginal certification results through terminations, pair untwist, damage, bend radius, and tester setup
• explaining fiber connector undercut and how it can affect insertion loss and reflectance
• setting practical vertical clearance for stacked cable tray tiers to help today’s install and future adds
• weighing the risks of electrical transformers in telecom rooms, including heat, space, and separation guidance
• preventing OSP cable damage with pulling tension limits, breakaway swivels, grips, bend radius, and inspections
• breaking down mediation vs arbitration and why documentation and change orders matter
• translating asynchronous vs synchronous transmission into plain English examples
• setting fusion splice loss expectations, what to troubleshoot, and why customer specs win
• simplifying redundancy terms N, N+1, N+2, 2N, and 2N+1 with an easy UPS example
• choosing security camera FOV based on distance, resolution, identification goals, and sun position over the year
• managing heat in small enclosed cabinets with PoE switches, UPSs, open space, and fan kits

Make sure you send your questions for next week’s show.

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Chuck Bowser RCDD TECH
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We walk through the cable test results that look “fine” until you understand what the graphs are really saying, from split pairs that still link up to length readings that don’t match reality. Along the way, we share practical ways to spot water intrusion, validate extended distance copper, and avoid patch cord mistakes that can quietly break PoE.
• split pairs and transposed pairs causing crosstalk and data loss even with a link light
• cable length vs electrical length plus propagation delay and delay skew for gig speeds
• why NVP settings matter and how faked settings show up in project-wide test reviews
• return loss patterns that point to water in the cable and using HDTDR to locate it
• pulling lubricant vs water symptoms and how insertion loss can improve as lube dries
• extended distance cabling and selecting vendor-specific test limits in the tester
• alien crosstalk testing workflow using saved results, disturbed links, and disturbers
• thin patch cords, PoE risk from rising resistance, and using the correct adapters for patch cord tests
So make sure you join us for this conversation and let me know in the comments below if you enjoyed this episode and should I do more like this?
Email Chuck at advertising at letstalkcabling.com and let's connect your brand to the right audience today.

Support the show

Knowledge is power! Visit our webpage to find out ways you can support the show. Also if you would like to be a guest on the show, please complete the application.

Chuck Bowser RCDD TECH
#CBRCDD #RCDD

Send us Fan Mail

We get hands-on with return loss, impedance, and wiremap faults to show how small physical choices in cable and connectors turn into measurable performance problems. We also share practical ways to use LinkWare and HDTDR diagnostics so you can stop guessing, pinpoint faults faster, and deliver results clients will actually accept.

• using certification testers proactively to validate jacks, patch panels, and install practices before full deployment
• why LinkWare files beat screenshots for troubleshooting and trend spotting across large projects
• what return loss measures and how impedance changes create reflections that hurt gig and multi-gig performance
• why matching cable and connectors as a system improves impedance consistency and throughput margin
• real-world failure example using screw-terminal “Category” wall plates and how HDTDR reveals end spikes
• how over-cinched zip ties and regular spacing distort cable geometry and push return loss into marginal territory
• the “star pass” problem and how codes, standards, best practices, manufacturer rules, and contracts collide
• using HDTDR to localize damage and distinguish return loss issues from crosstalk behavior
• wiremap fault walkthroughs for opens, shorts, and rolled pairs plus what distance-to-fault really means
• why cheap wiremap testers can miss split pairs and create hard-to-explain network problems
• pass-through connector controversy framed as crimper fit, blade maintenance, and workmanship
• why field-terminated IDC connectors can reduce bad crimps and resistance imbalance within a pair

if you have not joined the Let's Talk Cabling crew, do it. Link below.
starting October, we're flipping the schedule. We're going to start doing live streams on Monday night at 6 p.m. And we're going to start doing the podcast on Wednesday night.
We'll see you in Philly at Texgiving October 23rd through the 25th.
Email Chuck at advertising at letstalkcabling.com and let's connect your brand to the right audience today.

Support the show

Knowledge is power! Visit our webpage to find out ways you can support the show. Also if you would like to be a guest on the show, please complete the application.

Chuck Bowser RCDD TECH
#CBRCDD #RCDD