Interfaces And Signaling Contact Of The Switches; Ethernet Interfaces - Electrical Ports; 10Base-T / 100Base-Tx - Siemens SCALANCE X-300 Manual

Description of the device

4.3 Interfaces and signaling contact of the switches

4.3 Interfaces and signaling contact of the switches
4.3.1

Ethernet interfaces - electrical ports

4.3.1.1

10Base-T / 100Base-TX

Transmission rate
The transmission rate of the electrical ports is 10 Mbps or as Fast Ethernet ports 100 Mbps.
Transmission mode
The transmission mode for 10Base-T / 100Base-TX is specified in the IEEE 802.3i / IEEE
802.3u standards of the Institute of Electrical and Electronic Engineers.
Autonegotiation (automatic detection of the best transmission modes) is default. The order in
which they are selected is:
● 100Base-TX full duplex
● 100Base-TX half duplex
● 10Base-T full duplex
● 10Base-T half duplex
Two communication modes are possible:
● Half duplex
● Full duplex mode
Connections to other switches can use half or full duplex; connections to hubs are possible
only in half duplex mode.
Transmission medium
Data transmission at 10 Mbps and at 100 Mbps is over two wire pairs (pin 1, 2, 3, 6) of the
twisted pair cable. For 10 Mbps, at least a category 3 (Cat 3) and for 100 Mbps, at least a
four-wire (2 x 2) category 5 (Cat 5) cable is necessary.
Transmission range
The maximum transmission range (segment length) is 100 m.
80
Two-way alternate transmission mode - it is only possible to either send or receive over
the interfaces at any one time.
Two-way simultaneous - both communication partners can send and receive at the same
time.
Operating Instructions, 10/2010, A5E01113043-10
SCALANCE X-300