3
Section 5 - Specifications
Network Standard:
IEEE 802.3u Ethernet 100Base-TX Class II Repeater
Transfer rate:
100 Mbps
Topology:
Tree/Star
Access Method:
CSMA/CD, 100 Mbps
Media:
Catagory 5, 2 pair, UTP or STP
Max. cable length:
328 ft. (100 meters)
Ports:
8 RJ-45 jacks
Crossover connector: 1 (port 8)
Auto-partition:
Yes
Dimensions:
10.75” x 6.54” x 1.69”
Certification:
FCC Part 15 Class A
Temperature:
0° C to 40° C (operating)
Humidity:
5% to 95% (operating, non-condensing)
Power:
100-240VAC, 0.4 Amp max., 50/60 Hz
Section 6 - 100 Base-TX Cable Requirements
100Base-TX networks use unshielded or shielded twisted-pair cable and 8-pin RJ-
45 modular connectors. Use 22-26 AWG, 2- or 4-pair, 100 ohm/ft, solid conductor
Category 5 cable. Maximum cable length from hub to workstation is 328' (100 m).
Figure 3 Hub’s RJ-45 Pin Assignments
Schematics for both straight and crossover twisted-pair cable are shown below.
Straight-Through
Crossover
(Hub)
(Adapter)
(Hub)
(Hub)
1 IRD+
1 OTD+
1 IRD+
1 IRD+
2 IRD-
2 OTD-
2 IRD-
2 IRD-
3 OTD+
3 IRD+
3 OTD+
3 OTD+
6 OTD-
6 IRD-
6 OTD-
6 OTD-
Note:
A crossover cable is only necessary if you are connecting two hubs which
do not have a daisy-chain port available.
Pin
Assignment
(MDI-X Port 1 - 8)
Assignment
(MDI Daisy-Chain Port)
1
Input Receive Data +
Output Transmit Data +
2
Input Receive Data -
Output Transmit Data -
3
Output Transmit Data +
Input Receive Data +
6
Output Transmit Data -
Input Receive Data -
4,5,7,8
Not Used
Not Used
8
1
