Milan Technology EFLHB0X00 Switch User Manual


 
E-FL-HB-0x00 in Half-Duplex Network
The 5-4-3 Rule applies separately to each collision domain. NOTE: A
collision domain is any Carrier Sense Multiple Access with Collision Detection
(CSMA/CD) network in which a collision will occur if two attached stations
transmit at the same time. A segment is the cable connection between two
network interfaces.
USING THE 5-4-3 RULE:
The 5-4-3 Rule allows no more than five segments in any 10-Mb/sec
Ethernet collision domain, no more than four repeaters (hubs) and no
more than three populated segments (10Base-2 or 10BASE-5 coaxial-
cable installations).
To determine the size of the collision domain by assigning segment
numbers to cable connections, determine the two network devices in a
transmission path that are separated by the greatest number of segments.
Define a segment path between the network devices by labeling the
cable connection to the first device segment 1 and numbering each
segment in the path to the last network device, up to segment n (n =
total number of segments 5). Verify that no segment path in the entire
collision domain contains more than n 5 segments.
STAT
10BASE-FL
1
2
3
4
5
6
7
8
PWR
COL
ACT
BB
1
3
2
4
5
7
6
8
STAT
10BASE-FL
1
2
3
4
5
6
7
8
PWR
COL
ACT
BB
1
3
2
4
5
7
6
8
STAT
10BASE-FL
1
2
3
4
5
6
7
8
PWR
COL
ACT
BB
1
3
2
4
5
7
6
8
STAT
10BASE-FL
1
2
3
4
5
6
7
8
PWR
COL
ACT
BB
1
3
2
4
5
7
6
8
1
2
3
3
3
4
4
4
4
5
CABLE SPECIFICATIONS
10BASE-2 Cable Specifications
10BASE-2 CABLE CHARACTERISTICS:
Cable type: Stranded Coaxial RG58 (ThinNet)
Impedance: 50 @ 10 MHz
Mutual Capacitance: 24 pF/ft ±20% @ 10 MHz
Maximum Cable Length: 185 meters (610 feet)
Maximum number network connections: 30
Minimum distance between connections: 0.5 meters (1.6 feet)
Terminate 10BASE-2 cable at one end using a 50 ohm terminator and at the other end
using a 50 ohm terminator grounded to earth ground.
AUI/10BASE-5 Cable Specifications
10BASE-5 CABLE CHARACTERISTICS:
Cable type: RG8 Solid Coaxial (ThickNet)
Impedance: 50 @ 10 MHz
Capacitance: 26pF/ft
Maximum Cable Length: 500 meters (1650 feet)
Maximum number network connections: 100
Minimum distance between connections: 2.5 meters (8.2 feet)
Terminate 10BASE-5 cable at one end using a 50 ohm terminator and at the other end
using a 50 ohm terminator grounded to earth ground.
AUI CABLE AND CONNECTOR SPECIFICATIONS
The cable is a special 4-pair individually shielded with an overall braided shield.
Maximum AUI Cable Length: 50 meters (165 feet)
AUI CONNECTOR CHARACTERISTICS:
AUI Port: Male DB-15 with locking posts.
AUI Connection: Cable shell must be grounded.
Connector Legend: 1 Logic Ref. 6 Power Return 11 Logic Ref
2 Collision+ 7 N/C 12 Receive
3 Transmit+ 8 Logic Ref. 13 Power
4 Logic Ref. 9 Collision-- 14 Logic Ref.
5 Receive+ 10 Transmit- 15 N/C
10BASE-FL Cable Specifications
Fiber Optic Cable Recommended: 62.5 / 125 µm multimode fiber
Optional: 100 / 140 µm multimode fiber
85 / 125 µm multimode fiber
50 / 125 µm multimode fiber
Wavelength 1300 nM
Fiber Optic Transmitter Power: min: -__._ dBm max: -__._ dBm
Fiber Optic Receiver Sensitivity: min: -__._ dBm max: -__._ dBm
Typical Maximum Cable Distance*: 2000 meters (6600 feet)
*Actual distance dependent upon physical characteristics of network installation.