3.0 INSTALLATION
The Model 2102 is designed to be easy to use. There are no
internal jumpers or configuration switches to set, so there is no need to
open the unit. The only configuration necessary for operation is the
proper setting of both the SQE and COL switches.
Figure 1 shows the location of the SQE switch, the COL switch and
the BNC coaxial jack.
3.1 CONNECTION TO THE AUI PORT
To establish connection to the AUI port, you must follow these
installation steps:
1.
Turn OFF the computer or device to which the Model 2102 is to be
connected.
2.
If the Model 2102 will be connected to the AUI port of an Ethernet
interface card, turn the SQE switch ON (the down position). If the
Model 2102 will be connected to the AUI port of an Ethernet hub or
repeater, turn the SQE switch OFF (the up position).
Note: The default is ON.
3.
If the Model 2102 will be used with a workstation or terminal server,
turn the COL switch OFF (the up position). When OFF, the MAU
detects collisions only when it is transmitting data. If the Model
2102 will be attached to a repeater (such as a hub), turn the COL
switch ON (the down position). When ON, the COL switch detect
collisions occurring during the transmitting or receiving modes.
Note: The default is OFF.
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Figure 1. Location of the SQE switch, COL switch and BNC coaxial jack
SQE COL
ON
Switches
BNC Coaxial Jack
4.
Open the slide latch of the AUI port and insert the Model 2102 into
the DB-15. Lock the slide latch to secure the Model 2102 in place.
If the AUI port is mounted to a card, make sure the card is
configured correctly and the AUI port is enabled.
Note: If connection to the AUI port is through a DB-15 cable, make
sure the cable is wired STRAIGHT THROUGH, with at least the
following signals being passed:
AUI PORT
MODEL 2102 DB-15
Signal
Pin #
Pin #
Signal
Data Out+
3 --------------3
Data Out+
Data Out -
10 --------------10
Data Out-
Data In+
5 --------------5
Data In+
Data In-
12 --------------12
Data In-
Collision In+
2 --------------2
Collision In+
Collision In-
9 --------------9
Collision In-
Voltage Common
6 --------------6
Voltage Common
Voltage Plus
13 --------------13
Voltage Plus
Protective
DB-15 --------------DB-15
Protective
Ground
Shell
Shell
Ground
3.2 CONNECTION TO THE 10BASE2 NETWORK
To establish connection to the 10Base2 network, you must attach a
BNC T-connector to the BNC coaxial jack (see Figure 1). Then attach
the two portions of BNC cable to the T-connector. If this is one of the
stations at either end of the BNC cable, attach the cable to the BNC
T-connector and attach a 50 ohm BNC termination (load) to the
remaining connection on the BNC T.
See Appendix B for the maximum number of MAUs per segment
and their proper spacing on the coaxial cable.
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