The unit will support synchronous uses like HDLC and support a hardware handshake or software handshake. The unit supports asynchronous operations using hardware or software handshake. The pins, on both connectors, are connected to jumper posts so they can be connected internally to any of the other pins. The jumper posts are setup so the RS232 and RS422 interfaces can be setup for either a DCE or DTE interface using shorting jumpers on the jumper posts.
||-25 to +85
||-65 to +125