CB-EL1 DB9 to RJ45 Adapter Table of contents: This adapter converts the CB-EL11 RJ45 port to a female serial port.For example, this adapter is used in Benderlink modules to connect the CB-EL1 board to the QUATECH or MOXA serial device servers. <be>Breakout TesterUse a breakout tester for continuity checks like this: