CABLE SPECIFICATIONS
(continued)
COPPER CABLE
Each RJ-45 connector requires 2 pairs of Category 5 rated cable.
The 50-pin Telco connector requires 24 pairs of Category 5 rated
cable.
Either shielded twisted-pair (STP) or unshielded twisted-pair (UTP) can
be used. DO NOT USE FLAT OR SILVER SATIN WIRE.
CATEGORY 5:
Gauge
24 to 22 AWG
Attenuation
22.0 dB /100m @ 100 MHz
Maximum Cable Distance:
Telco
75 meters
RJ-45
100 meters
TELCO CONNECTOR
TELCO SIGNALS
Media Converter Port in Full-Duplex Network
In a full-duplex network, maximum cable lengths are determined by the
cables used. See page 10 for cable specifications.
NOTE: The 5-Segment Rule described below does NOT apply in a full-
duplex network.
Media Converter Port in Half-Duplex Network
The 5-Segment Rule applies separately to each collision domain.
USING THE 5-SEGMENT (5-4-3) RULE:
NOTE: A segment is the cable connection between network interfaces.
In any 10-Mbit/sec Ethernet collision domain, the 5-Segment Rule allows no
more than five segments. The 5-4-3 Rule version of the 5-Segment Rule
allows no more than five segments and also allows no more than four
repeaters (hubs) and three populated segments (10Base-2 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.
E-TBT-FRL-xx
Port
Half-Duplex Collision Domain
Half-Duplex Collision Domain
Full-Duplex - NO Collision Domain
E-TBT-FRL-xx
Port
E-TBT-FRL-xx
Port
1
3
4
5
2
1
hub
hub
hub
hub
hub
hub
hub
3
4
2
10BASE-T/10BASE-FL Half-Duplex Collision Domain
5-Segment Rule
Pin # Signal
Pin # Signal
1
Port 1 Transmit -
26
Port 1 Tr
2
Port 1 Receive -
27
Port 1 R
3
Port 2 Transmit -
28
Port 2 Tr
4
Port 2 Receive -
29
Port 2 R
5
Port 3 Transmit -
30
Port 3 Tr
6
Port 3 Receive -
31
Port 3 R
7
Port 4 Transmit -
32
Port 4 Tr
8
Port 4 Receive -
33
Port 4 R
9
Port 5 Transmit -
34
Port 5 Tr
10
Port 5 Receive -
35
Port 5 R
11
Port 6 Transmit -
36
Port 6 Tr
12
Port 6 Receive -
37
Port 6 R
13
Port 7 Transmit -
38
Port 7 Tr
14
Port 7 Receive -
39
Port 7 R
15
Port 8 Transmit -
40
Port 8 Tr
16
Port 8 Receive -
41
Port 8 R
17
Port 9 Transmit -
42
Port 9 Tr
18
Port 9 Receive -
43
Port 9 R
19
Port 10 Transmit -
44
Port 10 Tr
20
Port 10 Receive -
45
Port 10 R
21
Port 11 Transmit -
46
Port 11 Tr
22
Port 11 Receive -
47
Port 11 R
23
Port 12 Transmit -
48
Port 12 Tr
24
Port 12 Receive -
49
Port 12 R
25
N.C.
50
N.C.
1
25
26
50
