Black Box LR0304A-KIT 4-Port T1/E1 Ethernet Network Extender Kit

• Supports speeds up to 6.144 Mbps on T1 and 7.936 Mbps on E1.
• Autosensing, autonegotiating 10-/100-Mbps LAN connections.
• Auto MDI/MDI-X means you never need a crossover cable on the Ethernet side.
• RS-232 console port for configuration.
• Line build-out (LBO) capability.

The pair of extenders included with this kit act as a bridge, enabling you to link two Ethernet networks across four T1/E1 lines. Because you're using leased lines provided by your telco, there are no distance limitations—you can extend your network anywhere you can get a T1 line. 
The T1/E1 Ethernet Network Extender converts protocols and data from Fractional T1/E1 to 10BASE-T/100BASE-TX Ethernet and supports both framed and unframed modes with line codes. 
The extenders multiplex data onto all four lines and automatically maintain the connection if a T1/E1 line goes down. When the line comes back into service, the extenders automatically restore it.

• Kit includes two extenders.
• Bridges 10BASE-T/100BASE-TX Ethernet across four T1/E1 lines.
• Dual Ethernet ports.
• Supports Fractional T1/E1 in framed and unframed mode.

Part code:

LR0304A-KIT