I manage purchasing for a 70-person engineering services company. That means I'm the one who orders the laptops, the HVAC filters, the cable—and, once in a while, the kind of telecom equipment that makes me wish I'd paid more attention in physics class. This is the story of the time I typed RFS vs Cisco into Google and almost bought the wrong thing.
It started as a simple problem. Our warehouse has no Ethernet, and the inventory scanners run over Wi-Fi. That Wi-Fi backhauls through a cellular router in the IT rack. The router kept dropping because the signal in that warehouse was terrible—concrete block walls, a metal roof, and a lot of racks between the front door and the back wall. The operations VP put it bluntly: "I don't care what you buy. Just make it work."
So I did the natural thing: I started researching. I knew Cisco made network gear. I had also seen RFS on some antenna and cable product pages. My first question was, RFS vs Cisco—which one is better for cellular?
That was the wrong question.
A regional distributor sent me a quote that had both brands on it. And that's when the confusion really kicked in.
The Quote That Made Me Pause
The quote had four real line items:
- RFS Cellflex cable, about 300 feet, for the antenna run
- RFS GDT, which the quote wrote as "GDT RFS"
- A Cisco 3210 LTE router for the warehouse network
- A Cisco switch that our network engineer referred to as the N93
My first reaction: two big names on one purchase order. That looked like a conflict. I even sent an email that said, "Which of these is the main brand? I don't want to buy both if we're choosing between RFS and Cisco."
The sales engineer was polite about it. "They're not competing," he said. "The Cisco 3210 is the modem. It makes the cellular connection. The RFS antenna and Cellflex cable get that connection to and from the outside. The RFS GDT protects the equipment from a surge. And the N93 is how everything connects to the office network."
I remember thinking: oh. They're layers, not options.
The Part I Almost Missed
Here's where the rookie mistake happened. I almost took the RFS GDT off the order. It was a small line item, about $200, and I had never heard of a gas discharge tube—or rather, I had seen the words, but I didn't know what it did. I thought it was some kind of filter we didn't need.
Everything I'd read about lightning protection was about whole-building surge protectors, not coax entry points. The spec sheet from RFS, which I finally pulled up in March 2024, said the GDT was designed for the frequencies our cellular router used. It would sit between the outside antenna and the Cisco 3210 and give a spike a safe place to go. Without it, a lightning hit on the roof antenna could go straight into a $1,500 router and probably damage the N93 switch too.
I didn't know that. But I learned it before I signed the order, and that's the lesson in this story.
As I said, I've been buying for this company for five years. I've made plenty of mistakes. The classic one is assuming a recognized brand name is enough. For this project, Cisco was the easy brand to recognize. RFS was the brand that actually solved the RF path. The part number N93 didn't mean anything to me, and neither did "GDT." But recognition isn't a substitute for understanding what each line item does.
Install and Result
The install took a weekend plus a morning. The contractor mounted a directional antenna on the exterior wall, ran the RFS Cellflex cable down through an existing conduit, and installed the RFS GDT at the entry panel. Inside, the cable connected to the Cisco 3210, and the router linked back to the office LAN through the N93 switch.
It was way simpler than I expected. The signal strength went from "drops every twenty minutes" to "steady enough that nobody thinks about it." The warehouse supervisor stopped asking me for updates. That sounds small, but for a busy operation, that's a win.
Small Order, Big Support
I want to be clear about something: our RFS order was small. Three hundred feet of cable, one gas tube, a few connectors—that's not a carrier-scale purchase. A lot of vendors would have sent the quote and disappeared. At first, that looked like a red flag.
This distributor didn't. The engineer spent time explaining the GDT to someone who clearly didn't know what it was. He answered emails on a Saturday. After that, choosing the distributor was a no-brainer. That's the kind of support that makes a small customer loyal.
Small doesn't mean unimportant. It means potential. The first time we had a big antenna project, we didn't go shopping for a new name—we called the same people.
So, RFS vs Cisco?
If you're searching RFS vs Cisco, stop. Here's what you need to know: those two companies don't compete in the way a head-to-head comparison assumes. Cisco builds the networking brain—routing, switching, wireless controllers. RFS builds the physical radio path—antennas, coaxial cable, filters, and the gas discharge tube that keeps lightning out of your equipment.
Most of the time, you don't choose one. You match them.
- Need a router or switch? Cisco is a solid pick.
- Need to get an RF signal from an antenna to that router? RFS Cellflex is a solid pick.
- Need to protect that router from a surge? That's where RFS GDT comes in.
The conventional wisdom is to standardize on one vendor and keep your life simple. My experience with this project taught me that some systems are better when the vendors are specialists. The key is knowing who owns which layer—and not skipping the $200 part that saves your $1,500 part.
If you've ever sat in front of a quote with part numbers that look like a code, take it from someone who was there: ask the "stupid" questions. The engineer who answers them is the vendor you should buy from. That's the bottom line.
