Digi Switch 910H User Manual

910H  
Ethernet Hub  
Quick Installation Guide  
For the Ethernet 10BASE-T 9-Port Mini Hub  
This guide includes the following information:  
“Introduction” on page 2  
Wall Mounting” on page 5  
“Legal” on page 6  
Doc #: 75411 Rev. A  
 
Install Guide  
1. Power (GREEN) Indicator  
When the power LED is lit, it indicates that the hubs power is on.  
2. Collision (RED) Indicator  
This LED indicator blinks when the hub detects a collision on the network.  
3. Link/ Transmit (GREEN) Indicators  
These LEDs Indicator light green when the respective connection is okay. A  
blinking LED indicates that transmission is occurring on the segment.  
4. Polarity/ Receive (YELLOW) Indicators  
These LEDs Indicator light red when data wires have been reversed (the  
polarity has been reversed) A blinking LED to indicates data is being received  
on the segment.  
5. Partition Indicators  
Partition is indicated by the alternate flashing of the green and yellow LEDs  
Normal Cascade  
8
7
6
5
4
3
2
1
9
DC 7.5V  
Fig u re 2  
1. RJ-45 UTP Ports  
The Hub is equipped with 8 RJ-45 UTP ports for making 10BASE-T hub-to-  
workstation connections.  
2. Cascade Enable Slide-Switch  
Slide this switch to the right to enable cascading with straight UTP cables.  
3. AC Adapter Port  
Plug the AC adapter jack into this port  
4. BNC Port  
The Hub is equipped with one BNC port for making 10BASE2 hub-to-  
workstation connections  
Model: MIL-910H  
3
 
Install Guide  
Making Network Connections  
The 910H hub has eight RJ-45 connectors for attaching up to eight 10BASE-T  
based workstations. To establish such connections:  
1. Ensure that both the Hub and the soon-to-be-connected workstation are in the  
power off mode.  
2. Plug one end of the UTP cable into an available 10BASE-T hub port.  
3. Plug the other end into the workstations network interface card. The  
following figure 3 illustrates a simple network topology using a 10BASE-T  
hub-to-workstation connections.  
The 910H hub has one BNC port for making 10BASE2 hub-to-workstation  
connections. To establish such connections:  
1. Ensure that both the Hub and the soon-to-be-connected workstation are in the  
power off mode.  
2. Plug one end of the coaxial cable into the Hubs BNC port. Please refer to  
figure 3 if you are having trouble locating this port.  
3. Connect the other end of the coaxial cable to the workstations BNC connector  
located on the network interface card. Please refer to figure 3 for an illustration  
of such a connection.  
Note: If port 1 (BNC PORT) doesn’t connect to the hub port1 (BNC PORT) is indicated by the  
alternate flashing of the green and yellow LEDs. The port 1 LEDs don’t flash after  
connecting cable to port 1 and using hub.  
The following diagram illustrates 10BASET and 10BASE-2 network connections  
using the hubs BNC connector.  
Normal Cascade  
8
7
6
5
4
3
2
1
9
DC 7.5V  
185m max.  
Fig u re 3  
Model: MIL-910H  
4
 
 
Install Guide  
Cascading Hubs  
When you 10BASE-T network needs to grow past the eight available UTP  
connections provided by the hub you should consider purchasing an additional  
hub and cascading it with the original hub.  
The 910H features a cascade enable switch. The switch allows you to use straight  
UTP cables instead of the traditional cables when cascading hubs on port 9.  
The following diagram illustrates 10BASE-T cascading:  
Up to 7 PCs  
Hub 1  
Normal Cascade  
8
7
6
5
4
3
2
1
9
DC 7.5V  
Up to 6 PCs  
Hub 2  
Normal Cascade  
8
7
6
5
4
3
2
1
9
DC 7.5V  
Up to 6 PCs  
Hub 3  
Normal Cascade  
8
7
6
5
4
3
2
1
9
DC 7.5V  
Up to 7 PCs  
Hub 4  
Normal Cascade  
8
7
6
5
4
3
2
1
9
DC 7.5V  
Fig u re 4  
Wall Mounting  
After you have decided on a suitable location for mounting the hub, mark the  
location for mounting two screws 165mm apart. At the marked locations, drill  
two holes and insert a tapping screw in each hole. Align the hubs wall-mount  
slots with the screws and slide the hub down until the screws are securely last to  
the hub. You can now complete the installation procedure by marking the  
necessary cable connections.  
Model: MIL-910H  
5
 
   
Legal  
Regulatory Approvals  
FCC Class A  
UL 1950  
CSA 22 No. 950  
EN60950  
CE  
– EN55022 Class B  
– EN50082-1  
Canadian EMI Notice  
This Class A digital apparatus meets all the requirements of the Canadian Interference-Causing  
Equipment Regulations.  
Cet appareil numérique de la classe A respecte toutes les exigences du Règlement sur le matériel  
brouilleur du Canada.  
European Notice  
Products with the CE Marking comply with both the EMC Directive (89/ 336/ EEC) and the Low Voltage  
Directive (73/ 23/ EEC) issued by the commission of the European Community. Compliance with these  
directives implies conformity to the following European Norms:  
EN55022 (CISPR 22) - Radio Frequency Interference  
EN50082-1 (IEC801-2, IEC801-3, IEC801-4) - Electromagnetic Immunity  
EN60950 (IEC950) - Product Safety  
Five-Year Limited Warranty  
Digi International warrants to the original consumer or purchaser that each of its  
products, and all components thereof, will be free from defects in material and/ or  
workmanship for a period of five years from the original factory shipment date. Any  
warranty hereunder is extended to the original consumer or purchaser and is not  
assignable.  
Digi makes no express or implied warranties including, but not limited to, any implied  
warranty of merchantability or fitness for a particular purpose, except as expressly set  
forth in this warranty. In no event shall Digi be liable for incidental or consequential  
damages, costs, or expenses arising out of or in connection with the performance of the  
product delivered hereunder. Digi will in no case cover damages arising out of the  
product being used in a negligent fashion or manner.  
To Contact Digi  
For prompt response when calling for service information, have the following information ready:  
Product serial number and rev.  
Date of purchase  
Vendor or place of purchase  
Reach Digi Technical Support at 408/ 744-2751  
Or E-mail at “sun-tech@dgii.com”  
Address: 1299 Orleans Drive  
Sunnyvale, CA 94089  
408/ 744-2775  
408/ 744-2793  
Voice:  
Fax:  
E-mail: info@dgii.com  
Doc #: 75411 Rev. A  
 
 

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