Standards, Protocols, And Related Reading; Ethernet Protocol; Media Specifications - 3Com 4007 Implementation Manual

Standards,
Protocols, and
Related Reading

Ethernet Protocol

Media Specifications

Table 39 Ethernet Media Specifications
Type Speed
10/100BASE-TX 10/100
Mbps
100BASE-FX 100 Mbps
1000BASE-SX 1000 Mbps
1000BASE-LX 1000 Mbps
GBIC
1000BASE-SX 1000 Mbps
GBIC
The system supports these Ethernet standards:
IEEE 802.3 — 10BASE-T Ethernet over unshielded twisted pair (UTP)
IEEE 802.3u — 100BASE-T Fast Ethernet over UTP or fiber-optic cable
IEEE 802.3z — 1000BASE-SX Gigabit Ethernet over multimode
fiber-optic cable and 1000BASE-LX Gigabit Ethernet over multimode
or single-mode fiber-optic cable
IEEE 802.3 — Carrier Sense Multiple Access with Collision Detection,
which controls Ethernet access. A station that intends to transmit
listens for network traffic. If it detects none, it transmits.
If two or more stations transmit at about the same time, their packets
experience a collision and the colliding data streams do not reach their
destinations. The sending stations stop transmitting, broadcast a
collision alert, and wait a random amount of time before trying again.
Table 39 summarizes the system's Ethernet media options.
Media Connector
Category 5 UTP RJ-45
single-mode fiber SC
multimode fiber SC
multimode fiber SC
single-mode fiber GBIC
multimode fiber GBIC, with duplex SC
conditioned launch cable
multimode fiber GBIC

Standards, Protocols, and Related Reading

Recommended Distance (max)
100 m
20 km
412 m (half-duplex)
2 km (full-duplex)
220 m (62.5 micron @
160 MHz * km modal bandwidth)
275 m (62.5 micron @
200 MHz * km modal bandwidth)
500 m (50 micron @
400 MHz * km modal bandwidth)
550 m (50 micron @
500 MHz * km modal bandwidth)
5 km (9 micron)
(qualified for up to 10 km)
550 m (62.5 and 50 micron @
all modal bandwidths)
550 m (62.5 and 50 micron @
all modal bandwidths)
159