INSTALLING THE MODEL 2100
Connection to the AUI Port. Follow these steps to connect the Model 2100
to the DB-15 AUI port:
1. Turn OFF the computer or device to which the Model 2100 is to be
connected.
2. If the Model 2100 is to be connected to the AUI port of an Ethernet
interface card, turn the SQE switch ON. If the Model 2100 is to be
connected to the AUI port of an Ethernet hub or repeater, turn the SQE
switch OFF.
3. Open the slide latch of the AUI port and insert the Model 2100 into the
DB-15. Lock the slide latch to secure the Model 2100 in place. If the AUI
port is mounted to a card, be sure that the card is configured correctly so
that the AUI port is enabled.
Note: If connection to the AUI port is being made by DB-15 cable, be sure
that the cable is wired STRAIGHT THROUGH, with at least the following
signals being passed:
AUI PORT
MODEL 2100
Pin#
Signal
Pin#
Signal
3
Data Out+
3
Data Out+
10
Data Out-
10
Data Out-
5
Data In+
5
Data In+
12
Data In-
12
Data In-
2
Collision In+
2
Collision In+
9
Collision In-
9
Collision In-
Connection to the 10BaseT Hub. To connect the Model 2100 to a 10BaseT
hub, use an unshielded twisted pair cable--terminated with RJ-45 plugs--wired
STRAIGHT THROUGH in the manner shown below:
MODEL 2100
10BASET HUB
Pin#
Signal
Pin#
Signal
1
T
1
T
2
Transmit-
2
Transmit-
3
3
6
Receive-
6
Receive-
REFERENCE
APPENDIX A. - LED INDICATORS
Power (PWR). This red light turns on when the Model 2100 is supplied
with power by the AUI port.
Link (LNK). This yellow light turns on when the Model 2100 is properly
connected to the twisted pair link and the network is operating If the
Link LED is not illuminated, transmit, receive and SQE functions will not
work.
Polarity (POL). This red light turns on when the Model 2100
determines that the polarity of the twisted pair signals is reversed.
Actually, the Model 2100 monitors the twisted pair receive signal to
determine if data is normal or inverted. If inverted data is detected, the
Model 2100 corrects the data internally. However, the Polarity LED will
remain on until the polarity of the twisted pair signals is physically
reversed.
Collision (COL). This red light turns on when the Model 2100
determines that transmit and receive signals have occurred
simultaneously over the twisted pair link. The collision LED also lights
when network jabber occurs, or when the SQE switch is turned ON.
Receive (RCV). This green light turns on when the Model 2100
receives a data packet from the network (via the twisted pair wiring).
Transmit (XMT). This green light turns on when the Model 2100
receives a data packet from the node (via the AUI port).
Jabber (JAB). This green light turns on when the Model 2100 receives
a continuous stream of unrecognizable data from the node. When the
jabber LED is illuminated, the Model 2100 will not transmit data. This
function is designed to keep a damaged node from continually
transmitting garbled information through the network. During normal
operation, this LED should remain unlit.
APPENDIX B. - SQE FEATURE
The SQE feature verifies that the Model 2100 receives packets
correctly: After the node sends each packet, the Model 2100 sends a
pulse back to the node verifying that the Model 2100 has received the
packet correctly. If the Model 2100 is connected to an interface card,
the SQE feature should be enabled (switch ON). If the Model 2100 is
connected to a hub or repeater, the SQE switch should be OFF.
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