USB to RS232 Serial over Cat5 Extender Kit is a low cost solution that provides remote access and control of any RS232 protocol device.

USB to RS-232 Extender
The USB to RS-232 Cat. 5 extender is a low cost hardware solution that will extend your RS-232 devices using a single standard Cat. 5 / 5e / 6 UTP cable. It provides full-duplex remote access and control of any RS-232 protocol device. The USB to RS-232 Cat. 5 extender kit consists of a local transmitter and remote receiver . It provides you with a tremendous amount of flexibility in your installation. You can place RS-232 devices in any location you want and control them remotely up to 90 meters ( 270ft ). 
Features
     Compatible with all RS-232 protocols.
     Extend RS-232 peripherals up to 90 meters.
     Compliant with USB 2.0 & 1.1 specification.
     Over 230kbps transfer rate.
     Bus-powered - no external power supply required for local or remote unit.
     Supports Windows 98SE / ME / 2000 / XP / Vista / 7 / 8 and Mac OS-8.6 and higher.
Model No.    UTS-101E
Chip    FTDI
Connector    Transmitter    Host    15 cm USB cable with USB Type A Male
        Output    RJ-45 Female
    Receiver    Input    RJ-45 Female
        Device    DB-9 Male
Interconnection Cable    Cat. 5 / 5e / 6
LED    Transmitter    1 ( Power)
    Receiver    3 ( TX / Power / RX )
Power Mode    Bus
Housing    Plastic
Dimension ( L x W x H )    66 x 39 x 20 mm