Comnet 100Mbps Extended Distance CopperLine SFP - CL-SFP3

Comnet CL-SFP3 100Mbps Extended Distance SFP Module

Overview

The Comnet CL-SFP3 is a single-channel Ethernet-over-UTP/coax SFP module designed for surveillance networks and industrial applications where standard Ethernet distances fall short. It delivers 100Mbps copper range extension up to 305 meters over 1-pair UTP cable, or 610 meters using coax with an optional RJ45-to-coax adaptor. This is the practical answer when you need to extend an IP camera feed, access control reader, or edge device beyond the 100-meter Ethernet limit without fiber infrastructure overhead.

Key Features

• 305m UTP Range: Transmits 100Mbps Ethernet over standard twisted-pair cable — eliminates the cost and complexity of fiber runs for moderate-distance extensions in warehouses, parking structures, and multi-building campuses.
• 610m Coax Option: With an optional RJ45-to-coax adaptor, reach 610 meters using existing coax infrastructure — a decisive advantage if your facility already has legacy coax buried or strung overhead.
• 100BaseFX SFP Compatible: Slots into any standard 100BaseFX SFP port on Comnet industrial switches or third-party equipment — no proprietary slots or adapters required beyond the optional coax converter.
• Auto-Configuration Local/Remote Modes: Automatically detects endpoint roles without manual jumper settings — reduces deployment time and configuration errors on site, especially useful in multi-node surveillance networks where you're daisy-chaining extenders.
• MSA Compliant: Meets Multi-Source Agreement standards, ensuring interoperability with standards-based network hardware and guaranteeing you won't paint yourself into a vendor corner.
• Limited Lifetime Warranty: Comnet backs the module for the long term, reducing replacement costs over a typical 5–10 year surveillance or industrial network lifecycle.

Integration & Compatibility

The CL-SFP3 integrates with any switch, media converter, or network appliance that supports 100BaseFX SFP optical ports. In surveillance deployments, this means you can extend IP camera feeds from a central Ethernet switch to remote locations using affordable copper infrastructure instead of fiber. For access control or IoT sensor networks, pair it with Comnet industrial switches or integrate into existing ONVIF-based systems. The module supports standard Ethernet protocols — there is no proprietary encapsulation, so compatibility with third-party VMS platforms and network management tools is automatic.

Because the CL-SFP3 operates at Layer 1 (physical layer), it is transparent to protocols and applications running above — IPv4, IPv6, RTSP, HTTP, HTTPS, and real-time video streams pass through without modification or latency introduction. This makes it ideal for retrofitting surveillance infrastructure or extending critical network segments without redesigning your overall network topology.

Specifications and Practical Deployment Notes

Ethernet Connections: 1 connection per module — a single SFP port that connects to your host switch or media converter. If you need to extend multiple camera feeds to the same remote location, deploy multiple CL-SFP3 modules (one per SFP slot available on your switch).

Cable Type: Standard UTP (unshielded twisted pair) — Category 5e or higher. For the full 305-meter reach, verify cable quality and ensure runs are not bundled with high-voltage AC wiring. If you see performance drops below 305 meters, check for EMI sources (variable-frequency drives, wireless access points, arc welders) and either reroute the cable or consider the coax option.

Maximum Speed: 100Mbps — sufficient for most single or dual IP camera streams (1080p at 15–30 fps consumes roughly 2–8 Mbps depending on codec and bitrate). Do not expect to saturate the full 100Mbps link; real-world surveillance video and sensor data typically leave headroom for redundancy and network management traffic.

Frequently Asked Questions

Q: Can I use the CL-SFP3 to extend a camera feed beyond 305 meters on UTP?

A: No. 305 meters on UTP is the hard limit for this module at 100Mbps. If you need greater distance, use the optional RJ45-to-coax adaptor to reach 610 meters over coax, or consider a fiber media converter paired with single-mode fiber for multi-kilometer reaches.

Q: Do I need special switches to use the CL-SFP3?

A: No. The CL-SFP3 plugs into any standard 100BaseFX SFP slot. Comnet industrial switches support it natively, but so do most enterprise and industrial switches from other vendors that have SFP optical ports.

Q: Will the CL-SFP3 work with my existing network VMS or camera management software?

A: Yes. The module operates transparently at the physical layer — all protocols and applications above Layer 1 work unchanged. ONVIF Profile S cameras, Milestone Xprotect, AXIS Camera Station, and any other IP-based system will function normally through the CL-SFP3.

Q: What's the warranty on the CL-SFP3?

A: Comnet provides a limited lifetime warranty on the CL-SFP3, covering defects in materials and workmanship for the life of the product under normal use.

Q: Can I daisy-chain CL-SFP3 modules to extend beyond 610 meters?

A: No. Chaining extenders introduces additional latency and potential signal degradation. For distances beyond 610 meters, deploy separate network segments or use fiber media converters with longer-range optics.

Q: Does the CL-SFP3 require external power?

A: No. The module draws power from the SFP host port itself — no separate power supply or PoE injector required. This simplifies installation in remote locations and reduces cabling clutter.

Karl Wilson

I've deployed the CL-SFP3 in several multi-building campus networks where running fiber was overkill but standard Ethernet couldn't bridge the distance. The ability to push 100Mbps over 305 meters of plain UTP cable eliminates a lot of infrastructure cost. What clinches it is the auto-config mode — you don't have to think about endpoint roles on each module, which cuts installation mistakes on remote sites where you won't have onsite support immediately available.

Technical Highlights:

• 305m UTP reach: Covers most campus and industrial deployments without fiber — practical for parking structures, warehouse extensions, and multi-building surveillance systems where running new fiber would delay the project.
• 610m coax option: If you have existing coax infrastructure already in place (legacy analog camera runs, control signal lines), the optional adaptor lets you repurpose it for IP, avoiding rip-and-replace costs.
• 100BaseFX SFP compatibility: Plug-and-play into any standard SFP slot — no proprietary modules or vendor lock-in. That matters when you're speccing a switch and want flexibility to add extenders without redesigning the port layout.

Deployment Considerations:

• 305 meters is line-of-spec distance over clean UTP. Real-world runs adjacent to AC power, VFDs, or wireless gear can drop usable distance by 10–20%. Plan site surveys carefully, especially in industrial or electrical facilities.
• The module is transparent at Layer 1 — protocols and VMS software don't care it's there. That's good for compatibility, but it also means you can't do frame-level optimization or protocol-aware buffering. If you're extending QoS-sensitive streams (real-time video with strict latency bounds), monitor end-to-end latency with a packet analyzer.

The CL-SFP3 is the right pick for surveillance or industrial IoT networks where distance exceeds standard Ethernet but fiber economics don't make sense. Pair it with a Comnet industrial switch or any standards-compliant SFP host, and you've got a transparent, maintenance-free extension that will run for years without tuning.