LEGRAND C2G 89510 Mode D'emploi page 30

Serial Configuration (UK)
29510/89510 built-in serial interface allows users to transmit RS-232 up to a maximum baud rate of 115,200 bps at bi-directional pass-through. Please
follow the installation and operation steps below.
You will need to use the supplied 6-pin RJ11 extension cable and RJ11 to DB9 adaptor for connecting the transmitter and receiver between the DCE (data
communication equipment) and DTE (data terminal equipment).
All manuals and user guides at all-guides.com
If there's no serial connector on your computer, you may use
a USB-to-serial adapter for connection. PN. 81632
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Baud Rate 115,200bps
Data Bits 8
Parity None
Stop Bits 1
Flow Control None