Selta SAEfon CL Serie Instructions D'utilisation page 53

plug for line cable
plug for handset cable
Figure 1-2 Connecting SAEfon CL 16D-28D cables
plug for line cable
plug for handset cable
Figure 1-3 Connecting SAEfon CL 76D and K module
Warning!
Before inserting the line cable into the RJ45 socket, make sure that
this is configured for numeric telephones and not for other kind of
terminations (such as trunk lines or analog telephones).
SAEfon CL - Operating instruction 53