Cable Specifications; Copper Cable - Transition Networks E-TEL-1200 User Manual

CABLE SPECIFICATIONS

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
Attenuation
Maximum Cable Distance:
TELCO CONNECTOR
1
26
TELCO SIGNALS
Pin # Signal
1 Port 1 Transmit -
2 Port 1 Receive -
3 Port 2 Transmit -
4 Port 2 Receive -
5 Port 3 Transmit -
6 Port 3 Receive -
7 Port 4 Transmit -
8 Port 4 Receive -
9 Port 5 Transmit -
10 Port 5 Receive -
11 Port 6 Transmit -
12 Port 6 Receive -
13 Port 7 Transmit -
14 Port 7 Receive -
15 Port 8 Transmit -
16 Port 8 Receive -
17 Port 9 Transmit -
18 Port 9 Receive -
19 Port 10 Transmit -
20 Port 10 Receive -
21 Port 11 Transmit -
22 Port 11 Receive -
23 Port 12 Transmit -
24 Port 12 Receive -
25 N.C.
(continued)
24 to 22 AWG
22.0 dB /100m @ 100 MHz
Telco 75 meters
RJ-45 100 meters
25
50
Pin # Signal
26 Port 1 Transmit +
27 Port 1 Receive +
28 Port 2 Transmit +
29 Port 2 Receive +
30 Port 3 Transmit +
31 Port 3 Receive +
32 Port 4 Transmit +
33 Port 4 Receive +
34 Port 5 Transmit +
35 Port 5 Receive +
36 Port 6 Transmit +
37 Port 6 Receive +
38 Port 7 Transmit +
39 Port 7 Receive +
40 Port 8 Transmit +
41 Port 8 Receive +
42 Port 9 Transmit +
43 Port 9 Receive +
44 Port 10 Transmit +
45 Port 10 Receive +
46 Port 11 Transmit +
47 Port 11 Receive +
48 Port 12 Transmit +
49 Port 12 Receive +
50 N.C.
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 512-Bit Rule described below does NOT apply in a full-duplex
network.
Media Converter Port in Half-Duplex Network
The 512-Bit Rule applies separately to each collision domain.
USING THE 512-BIT RULE
In a half-duplex network, maximum cable lengths are determined by the
round trip delay limitations of each Fast Ethernet
(Switches and routers divide the network into separate Ethernet™
collision domains.) The 512-Bit Rule determines maximum distances by
calculating the collision domain round-trip delay in bit-times.
To calculate a collision domain round-trip delay in bit-times, find the
Class I repeater
Class II repeater
Class I TX/FX media converter
Class II TX/FX media converter
DTE (PC, switch, router)
E-TX-FX-xx00 port
1 meter CAT.5 TP cable 1.11 BT
1 meter fiber cable
Fast Ethernet switch
the result is less than or equal to 512 bit-times, the path is good.
200 meters fiber
@ 1.0 BT/meter
= 200BT
Class II
10 meters TP
Hub
10 meters TP
@ 1.11BT/meter
= 92BT
@ 1.11BT/meter
= 11.1BT
= 11.1BT
50.00BT
+11.10BT
+92.00BT
DTE= 50BT
+200.00BT
+15.00BT
+11.10BT
+50.00BT
__________
_
= 439.20BT
Half-Duplex Collision Domain
NOTE: Media converter
port is 15 bit-times IN
and 15 bit-times OUT =
Full-Duplex - NO Collision Domain
30 bit-times round-trip.
collision domain.
™
longest path between any two
terminal devices in the collision
140 BT
92 BT domain. Calculate the round
130 BT
trip delay by multiplying the
92 BT
length of the cable (in meters)
50 BT
by the delay per meter (in bit-
15 BT
times (BT)), then take the sum of
1 BT all cable delays plus station
50 BT
(DTE), repeater, and multi-port
media converter port delays. If
Half-Duplex Collision Domain
50.00BT
+11.10BT
+140.00BT
150 meters fiber +150.00BT
DTE= 50BT
+15.00BT
@ 1.0 BT/meter
+11.10BT
= 150BT
+50.00BT
__________
Class I
Hub
= 437.20BT
= 140BT
10 meters TP
E-TX-FX-xx
@ 1.11BT/meter
Port
= 11.1BT
= 15BT
E-TX-FX-xx
DTE= 50BT
Port
= 15BT
10 meters TP
@ 1.11BT/meter
= 11.1BT
E-TX-FX-xx
Port
Switch/
= 15BT
Router
= 50BT
_