Siemens X-400 - Manual (Page 100)

Installation and Commissioning
Operating Instructions for SCALANCE X-400 Industrial Ethernet Switches
100 C79000-G8976-C186-03
Fast Ethernet Transfer with FOC
Data transmission at 100 Mbps is over multimode FOC or single mode FOC. In
both cases, the BFOC plug on the fiber-optic cable is plugged into the BFOC
socket.
When a media module is inserted, the two front sockets belong to port 1 and the
two rear sockets to port 2. The front socket is the input and the rear socket is the
output socket of the particular port. Behind the labeling strip on the front of the me-
dia module, you will see the relevant symbols.
Notice
Fiber-optic cable connectors are susceptible to contamination and mechanical
damage to the face. Protect open connections with the supplied dust caps.
Figure 6-19 BFOC plug with fast Ethernet media module MM491-2