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Connecting to the AUI Port

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Installation Guide for the Model EN516 Ethernet Hub Connecting to the AUI Port The AUI port at the rear panel of the Model EN516 hub is normally used for connecting a thick coaxial segment. When using the AUI port, refer to Figure 3-6 and follow these steps: 1. Connect the AUI port on the hub to an external coaxial transceiver through an AUI transceiver cable. With the right type of transceiver, you could use the AUI port to connect to most types of network media, including 10BASE-T twisted pair, thin coaxial, thick coaxial, and 10BASE-FL ﬁber optic cables. 2. Disable the signal quality error (SQE) test function for each external transceiver connected to the AUI port. Refer to your transceiver documentation for information about disabling the SQE test function. Note: If the SQE test function is not disabled, the port is automatically partitioned. 3. Proceed to "Completing and Verifying the Installation" on page 3-11. 1 2 3 4 Key: 1 = Cable termination device 2 = 10BASE-5 transceiver 31EA 3 = Thick coaxial cable 4 = Transceiver cable (AUI cable) Figure 3-6. Cascading hubs through the AUI port Installation 3-9

Section	Page
Installation Guide	1
for the Model EN516	1
Ethernet Hub	1
Trademarks	2
Statement of Conditions	2
Federal Communications Commission (FCC) Statement	2
EN 55 022 Declaration of Conformance	2
Bestätigung des Herstellers/Importeurs	2
Certificate of the Manufacturer/Importer	3
Voluntary Control Council for Interference (VCCI) Statement	3
Customer Support	3
World Wide Web	3
Contents	5
Chapter1 Introduction	5
Chapter2 Physical Description	5
Chapter3 Installation	5
Chapter4 Troubleshooting	6
Appendix A Technical Specifications	6
Appendix B Cabling Specifications	6
Appendix C Connector Pin Assignments	6
Index	6
Figures	7
Tables	9
Chapter1 Introduction	11
Features	11
Chapter2 Physical Description	13
Front Panel	13
Figure21. Front panel of the Model EN516 hub	13
LED Indicators	14
Table21. LED descriptions	14
RJ-45 Ports	15
Normal/Uplink Push Button	15
Rear Panel	16
Figure22. Rear panel of the Model EN516 hub	16
Chapter3 Installation	17
Preparing the Site	17
Package Contents	17
Required Tools	18
Installing the Hub	18
1. Unpack the hub.	18
2. Choose a location near the devices to be connected and close to an electrical outlet.	18
3. Follow the instructions for installing the hub on a flat surface or in a rack.	18
Installing the Hub on a Flat Surface	19
1. Install self-adhesive pads on the bottom of the hub.	19
2. Set the hub on a tabletop or shelf so that it has at least 2 inches (5 cm) of space on all sides.	19
3. Install any PCs, additional hubs, or other devices in your stack.	19
Installing the Hub in a Rack	19
1. Attach the mounting brackets (supplied in the rack mounting kit) to the sides of the hub using...	19
2. Attach the hub (with the mounting bracket) to the rack using two pan-head screws with nylon wa...	19
3. Install any PCs, additional hubs, or other devices in your stack.	19
Figure31. Installing mounting brackets to the hub and to a rack	20
Connecting the Hub	20
Connecting to the RJ-45 Ports	20
Figure32. Connecting a workstation to an RJ-45 port on the Model EN516 hub	21
Figure33. Cascading multiple hubs in a hierarchical star through the RJ-45 ports	22
Figure34. Cascading multiple hubs daisy-chain style through the RJ-45 ports	23
Connecting to the BNC Port	23
1. Insert the BNC T-connector on the BNC port of the Model EN516 hub.	23
2. Connect the coaxial cable that leads from a device on the network to one of the self-locking e...	23
3. Connect the coaxial cable from another device to the remaining end of the self-locking BNC T-c...	24
4. Proceed to “Completing and Verifying the Installation” on page311.	24
Figure35. Cascading hubs through the BNC port	24
Connecting to the AUI Port	25
1. Connect the AUI port on the hub to an external coaxial transceiver through an AUI transceiver ...	25
2. Disable the signal quality error (SQE) test function for each external transceiver connected t...	25
3. Proceed to “Completing and Verifying the Installation” on page311.	25
Figure36. Cascading hubs through the AUI port	25
Connecting to Other NETGEAR Products	26
Figure37. Connecting multiple NETGEAR products	26
Completing and Verifying the Installation	27
Chapter4 Troubleshooting	29
Front Panel LEDs	29
Collision LED	29
Link/Rx LED for the RJ-45 Ports	30
AUI Rx LED and BNC Rx LED for the AUI and BNC Ports	30
Partition LED for the RJ-45 Ports	30
Partition LED for the BNC Port	30
Partition LED for the AUI Port	31
Installation	31
Cabling	31
Network Interface Cards	32
Configuration	32
Hub Integrity	32
Appendix A Technical Specifications	33
General Specifications	33
Network Protocol and Standards Compatibility	33
Data Rate	33
Interface	33
Power Adapter	33
Electrical Specifications	33
Physical Specifications	33
Environmental Specifications	34
Electromagnetic Emissions	34
Electromagnetic Susceptibility	34
Safety Agency Approvals	34
Appendix B Cabling Specifications	35
Cable Specifications	35
TableB-1. Electrical requirements of Category 3, 4, and 5 cables	35
Twisted Pair Cables	36
FigureB-1. Straight-through twisted pair cable	36
FigureB-2. Crossover twisted pair cable	36
50 W Coaxial Cable	37
TableB-2. Specifications of 10BASE2 (ThinNet) RG 58 A/U or RG 58 C/U coaxial cable	37
AUI Cable	37
TableB-3. Specifications of AUI cable	37
Appendix C Connector Pin Assignments	39
RJ-45 Connector	39
Figure C-1. RJ-45 connector	39
TableC-1. RJ-45 connector pin assignments	40
AUI Connector	40
Figure C-2. AUI connector pin assignments	40
TableC-2. AUI connector pin assignments	41
BNC Connector	41
Figure C-3. BNC connector	41
BNC T-Connector and 50 W Terminator	42
Figure C-4. 50 W terminator and BNC T-connector	42
Numerics	43
A	43
B	43
C	43
D	44
F	44
H	44
I	44
L	44
M	44
N	44
P	45
R	45
S	45
T	45
U	45
W	45

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Installation Guide for the Model EN516 Ethernet Hub

Installation

3-9

Connecting to the AUI Port

The AUI port at the rear panel of the Model EN516 hub is normally used for connecting a thick

coaxial segment.

When using the AUI port, refer to Figure 3-6 and follow these steps:

Connect the AUI port on the hub to an external coaxial transceiver through an AUI

transceiver cable.

With the right type of transceiver, you could use the AUI port to connect to most types of

network media, including 10BASE-T twisted pair, thin coaxial, thick coaxial, and 10BASE-FL

fiber optic cables.

Disable the signal quality error (SQE) test function for each external transceiver

connected to the AUI port.

Refer to your transceiver documentation for information about disabling the SQE test

function.

Proceed to “Completing and Verifying the Installation” on page 3-11.

Key:

1 = Cable termination device

3 = Thick coaxial cable

2 = 10BASE-5 transceiver

4 = Transceiver cable (AUI cable)

Figure 3-6.

Cascading hubs through the AUI port

Note:

If the SQE test function is not disabled, the port is automatically partitioned.

31EA