Compare StarTech.com 1 Port USB over Cat5 / Cat6 Ethernet Extender - up to 131ft (40m) $130.64 Quick Look
Compare StarTech.com Serial DB9 RS232 Extender over Cat 5 - Up to 3300 ft (1000 meters) $116.89 Quick Look
Compare StarTech.com 1 Port Gigabit PoE+ Extender - 802.3at and 802.3af - 100 m (330 ft) - Power over Ethernet Extender - PoE Repeater Network Extender $134.55 Quick Look