This product is no longer being sold and might not be supported.
Please see replacement part: DDW-142-EX
EX Approved Ethernet extender with serial support 4x RJ-45, 10 Mbit/s, 100 Mbit/s Base T 2x 2-position detachable screw terminals for SHDSL ports 1x RJ-45, RS-232 port 300 bit/s – 115.2 kbit/s