Model EN104/EN108/EN116 Ethernet Hub Installation Guide
AUI Connector

The AUI connector for the hub connects the hub through an external transceiver to other devices.

An inter-repeater fiber link using a 10BASE-F transceiver is an example of such an application.

BNC Connector

The BNC connector for the hub supports 10 Mbps data transmission and connects the hub to other

devices.

RJ-45 Connector
Pin Assignment
Normal Assignment:
Ports 1–3 on the
Model EN104 hub
Ports 1–7 on the
Model EN108 hub
Ports 1–15 on the
Model EN116 hub
Uplink Assignment:
Port 4 on the
Model EN104 hub
Port 8 on the
Model EN108 hub
Port 16 on the
Model EN116 hub
1 Input Receive Data + Output Transmit Data +
2 Input Receive Data - Outpu t Transmit Data -
3 Output Transmit Data + Input Receive Data +
6 Output Transmit Data - Input Receive Data -
4, 5, 7, 8 Not used Not used
AUI Connector Pin Assignment Signal
1, 4, 11, 14, 15 Ground
2CI-A
3DO-A
5DI-A
6 + 12 V DC return
7, 8 Not used
9CI-B
10 DO-B
12 DI-B
13 + 12 V DC (500 mA maximum)
8148EA
1 8
15 9
AUI connector
8149EA
12
Center conductor Ground shield
BNC connector