Technical information

8/5
Characteristics
Technical information
Ethernet network
Infrastructure
Distance limitations and number of devices per segment
Based on standard 802.3, the distance limits and number of devices in cascade are as follows:
Type Maximum segment
length (1)
Maximum segment
length (offered by
ConneXium devices)
Maximum number of
hubs in cascade
Maximum number of
switches in cascade
10BASE-T 100 m/
328.08 ft 100 m/328.08 ft 4 Unlimited
100BASE-TX 100 m/328.08 ft 100 m/328.08 ft 2 Unlimited
1000BASE-T 100 m/328.08 ft 100 m/328.08 ft – Unlimited
10BASE-FL 2,000 m/6,561.66 ft 3,100 m/10,170.57 ft
(2)
11 (ber ring) –
100BASE-FX 412 m/1,351.70 ft
2,000 m/6,561.66 ft
4,000 m/13,123.32 ft
with multimode ber,
32,500 m/106,627 ft
with singlemode ber (3)
– Unlimited
1000BASE-SX 275 m/
902.23 ft – – Unlimited
(1) Based on 802.3, full duplex/half duplex.
(2) Depends on the optical ber budget and ber attenuation.
(3) Depends on the optical ber budget and ber attenuation, typical specication is
2,000 m/6,561.66 ft for multimode and 15,000 m/49,212.45 ft for singlemode.
Physical media
The Ethernet 802.3 standard denes the Physical Layer. A summary of the most common media is given below:
Type Data rate Cable type Connector type
Dened by 802.3 Recommended by
Schneider Electric
Dened
by 802.3
Recommended by
Schneider Electric
10BASE-T 10 Mbps CAT 3 - UTP CAT 5E - STP RJ45 RJ45
100BASE-TX 100 Mbps CAT 5 - UTP CAT 5E - STP RJ45 RJ45
1000BASE-T 1 Gbps CAT 5 - UTP CAT 5E - STP RJ45 RJ45
10BASE-FL 10 Mbps Two multimode optical
ber cables typically
62.5/125 µm ber,
850 nm light wavelength
Two multimode optical
ber cables typically
62.5/125 µm ber,
850 nm light wavelength
ST ST
100BASE-FX 100 Mbps Two multimode optical
bers typically
62.5/125 µm multimode
ber,
1,300 nm light wavelength
Two multimode optical
bers typically
62.5/125 µm multimode
ber,
1,300 nm light wavelength
ST SC
– Two monomode optical
bers typically 9/125 µm
multimode ber,
1,300 nm light wavelength
– SC
1000BASE-SX 1 Gbps Two 62.5/125 or 50/125
multimode optical bers,
770 to 860 nm light
wavelength
Two 62.5/125 µm or
50/125 m multimode
optical bers,
1,300 nm light wavelength
SC LC
1000BASE-LX 1 Gbps – Two 9/125 µm singlemode
optical bers,
1,300 nm light wavelength
– LC
Note: These specications are dened by IEEE 802.3. However, some of the cables are no
longer being developed. For instance, for 10BASE-T and 100BASE-TX, a CAT-5E cable is used.
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