Cascade (Series Connection) Of Two Scalance Xcm-100 - Siemens SCALANCE XCM-100 Equipment Manual

• Make sure that an 8-core copper cable is used.
• The media converter only establishes one Gigabit Ethernet link via autonegotiation.
3.4

Cascade (series connection) of two SCALANCE XCM-100

You can connect two media converters in series. Coupling of the two media converters is usually
performed over its optical ports. Coupling over the electrical ports is also possible (repeater for
optical links). The coupled SCALANCE XCM-100 are operated between two partner devices:
①
②
The same SFP transceiver must be plugged into both media converters.
A maximum of two SCALANCE XCM-100 can be connected in series. Mixed operation of
SCALANCE XCM-100 with SCALANCE X101-1/X101-1LD is not possible.
Because the SFP ports are connected to each other, both media converters switch the
connection status (link up or link down) at almost the same time. Delays only occur due
to the length of the optical connection or the duration of link establishment on the electrical
ports of the media converters.
Observe the following rules for Fast Ethernet operating mode:
• Use an SFP transceiver of the type SFP991-1* between the two media converters.
• Make sure that the correct optical cable is used.
• Make sure that autonegotiation is enabled for the partner devices of the electrical
connections.
• The media converters ensure that the Fast Ethernet link is set via autonegotiation. This
applies to partner devices with Fast Ethernet and Gigabit Ethernet.
Observe the following rules for Gigabit Ethernet operating mode:
• Use an SFP transceiver of the type SFP992-1* between the two media converters.
• Make sure that the correct optical cable is used.
• Make sure that the partner devices of the electrical connections are Gigabit-capable and the
configuration of the devices is not restricted to Fast Ethernet.
SCALANCE XCM-100 Media Converter
Equipment Manual, 12/2023, C79000-G8976-C659-03
SCALANCE XCM102
Partner device (electrical connection)
3.4 Cascade (series connection) of two SCALANCE XCM-100
Area of application
13