Interface Card InLine 66659M

The InLine 66659M Interface Card is a USB-C to SFP Gigabit fiber network adapter designed for flexible, high-performance network connections. Its modular SFP port supports a range of fiber transceivers (for example SX, LX) to match different distances and infrastructures. The adapter delivers up to 1,000 Mb/s over USB-C and includes energy-saving IEEE802.3az support, on-chip buffering, flow control and checksum offload to ensure reliable, low-latency data transfer in professional IT and industrial environments.

Advantages

The adapter provides modular fibre optic connectivity via a USB-C port and a universal SFP slot for various transceivers, enabling easy changes to network architecture. It supports gigabit speeds while reducing power consumption through IEEE802.3az. Broad operating system compatibility (Windows, macOS, Linux) facilitates integration across devices. On-chip buffer, flow control and checksum offload minimise packet loss and maintain stable throughput. Additional features such as VLAN tagging, automatic cable detection, jumbo frame support (up to 9K) and QoS capabilities make it suitable for demanding environments.

Suitable for

• Temporary or permanent network connections for laptops and desktop systems
• Integration into server racks and data centre infrastructure
• Industrial and electromagnetically sensitive environments requiring fibre links
• Network setups needing VLAN support, QoS and jumbo frame handling

Key specifications

• Product name: Interface Card InLine 66659M
• Brand / MPN: InLine, 66659M
• EAN: 4043718345434
• Interface: USB-C to SFP (modular SFP port)
• Maximum throughput: up to 1,000 Mb/s (Gigabit)
• Supported protocols: IEEE 802.3 / 802.3u / 802.3ab
• VLAN / prioritisation: IEEE 802.1Q, Layer 2 Priority
• Jumbo frames: up to 9K
• Power saving: Power Down / Link Down / LPM (IEEE802.3az)
• Chipset: Realtek RTL8153
• Other features: skew/polarity correction, Auto-MDI/MDI-X crossover detection

How to use

Insert a suitable SFP transceiver into the modular SFP slot and connect the fiber cable according to the transceiver specifications. Plug the USB-C connector into a host device with a compatible USB-C port. Install any necessary drivers if the host operating system does not provide native support; Windows, macOS and many Linux distributions are broadly supported. Verify link status and configure network settings such as IP, VLAN and QoS on the host system or network equipment as required.

Usage recommendations

Use transceivers that match the required fiber type and distance (e.g. SX for short reach, LX for long reach). For rack or permanent installations, ensure secure mounting and proper cable management. Enable power-saving modes if supported in low-traffic scenarios. When deploying in critical environments, verify driver compatibility and test throughput with intended workloads.