An FTP cable usually stands for Foiled Twisted Pair Ethernet cable. It is similar to ordinary Ethernet cable, but it has an additional foil shield wrapped around all four twisted pairs of wires. This shielding helps reduce electrical interference.
Here’s how it compares:
- UTP (Unshielded Twisted Pair): No shielding. The most common type for home and office networks.
- FTP (Foiled Twisted Pair): One overall foil shield around all the wire pairs.
- STP (Shielded Twisted Pair): Individual shielding around each pair, sometimes plus an overall shield, offering even greater protection.
FTP cable is useful where there is significant electrical noise, such as:
- Near power cables
- Industrial environments
- Around radio transmitters
- In some data centres
Advantages:
- Better protection against electromagnetic interference (EMI)
- Can provide more reliable networking in noisy environments
Disadvantages:
- More expensive than UTP
- Slightly thicker and less flexible
- Ideally should be used with properly grounded shielded connectors and networking equipment to get the full benefit
For most home networks, Cat5e or Cat6 UTP is perfectly adequate. However, given your interest in radio astronomy and radio equipment, if your Ethernet cables run close to receivers, transmitters, or antenna feedlines, FTP or another shielded cable may help reduce unwanted interference.