Cable Spec 40 - RJ45-DB25 MiiC Pinout
From ATTWiki
The MiiC serial port at connector CNP109 is a female gender. Use a male gender on the DB25 end of this adapter.
You can use this in a cable with the connector defined as Cable Spec 1 at the opposite end of the cable.
Note that the jumping of the two wires is necessary for newer MiiC benders. Without it, the MiiCs will not respond to a request for communication.
Pinout
Other
See Cable Spec