An inline coupler is a small, passive networking device used to connect two Ethernet cables (RJ45) together, acting as a female-to-female extender. It enables joining cables to create a longer, single cable without requiring tools or re-terminating, which is ideal for extending network connections. It connects two cables to extend their reach without altering the data signal. They are requently used for LAN networks, telephone lines, and industrial data applications. They are available in various categories (Cat5e, Cat6, Cat6a) to match network performance needs. Common options include shielded (for reduced interference) or unshielded, with straight pin-outs being the standard. While functionally similar to a keystone jack, an inline coupler is typically used inline with cables, whereas a keystone jack snaps into a wall plate. While they extend distance, they do not boost the signal and may introduce minor attenuation. It is recommended to use them sparingly, generally no more than one per connection channel.
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