UNICOM Electric Switch FEP 32024T User Manual

Micro-Switch/24  
24 Port 10/100Mbps  
Desktop Fast Ethernet Switch  
(Auto MDI/MDIX)  
FEP-32024T  
908 Canada Court  
City of Industry, CA 91748 U.S.A.  
Phone: 626.964.7873 or 800.346.6668 Fax: 626.964.7880  
USER’S MANUAL  
©UNICOM 2005. UNICOM and “A Network Systems Solution” are trademarks of UNICOM Electric, Inc.  
All rights reserved. Specifications subject to change without notice.  
Rev: 01.05  
 
Content  
1. Introduction..............................................................1  
Features ......................................................................1  
Package Contents......................................................2  
Ethernet Switching Technology...............................3  
2. Hardware Description..............................................4  
Front Panel .................................................................4  
LED Indicators............................................................4  
Rear Panel...................................................................5  
Desktop Installation...................................................6  
3. Network Application................................................7  
4. Troubleshooting.....................................................10  
5. Technical Specification.........................................12  
 
 
1. Introduction  
The 24 Port Micro-Switch/24 Desktop Fast Ethernet Switch is a multi-port  
Switch that can be used to build high-performance switched workgroup  
networks. This switch is a store-and-forward device that offers low latency  
for high-speed networking. It is targeted at workgroup, department, or  
backbone computing environments in SME (small, medium enterprise)  
businesses.  
The Micro-Switch/24 features a “store-and-forward “switching scheme. This  
allows the switch to auto-learn and store source addresses on a 4K-entry  
MAC address table.  
Features  
Conforms to IEEE 802.3, 802.3u and 802.3x  
Twenty-four (24) 10/100 Base-TX RJ-45 Ethernet ports  
Auto-MDIX on all ports  
IEEE 802.3x flow control support  
Flow control on full-duplex  
Back pressure on half-duplex  
N-Way Auto-Negotiation supported  
Store-and-Forward switching architecture and no-blocking full wire  
speed  
Back plane Bandwidth 4.8 Gbps)  
Embedded 1.25Mbits memory buffer  
4K MAC address table  
Compact 10” size  
1
 
Package Contents  
Unpack the contents of the Micro-Switch/24 Desktop Fast Ethernet Switch  
and verify them against the checklist below.  
Micro-Switch/24 Desktop Fast Ethernet Switch  
User Guide  
Power Cord  
Four Rubber Feet  
Micro-Switch/24  
User Guide  
Power Cord  
Rubber Feet  
Figure 1-2. Package Contents  
Compare the contents of your Micro-Switch/24 package with the standard  
checklist above. If any item is missing or damaged, please contact your local  
dealer for service.  
2
 
Ethernet Switching Technology  
Ethernet Switching Technology dramatically boosted the total bandwidth of a  
network, eliminated congestion problems inherent with Carrier Sense  
multiple access with Collision Detection (CSMA/CD) protocol, and greatly  
reduced unnecessary transmissions.  
This revolutionized networking in a number of ways. First, by allowing two-  
way, simultaneous transmissions over the same port (Full-duplex) which  
essentially doubled the bandwidth. Second, by reducing the collision domain  
to a single switch-port which eliminated the need for carrier sensing. Third,  
by using the store-and-forward technology’s approach of inspecting each  
packet to intercept corrupt or redundant data and switching eliminated,  
unnecessary transmissions that slow the network. Also employing an  
address learning function, Ethernet replaced inefficient receiving ports.  
Auto-negotiation regulates the speed and duplex of each port, based on the  
capability of both devices. Flow-control allows transmission from a 100Mbps  
node to a 10Mbps node without loss of data. Auto-negotiation and flow-  
control may require disablement of some networking operations that involve  
legacy equipment. Disabling the auto-negotiation is accomplished by  
manually setting the speed or duplex of a port.  
Ethernet Switching Technology supplied higher performance at costs lower  
than other solutions. Wider bandwidth, no congestion, and the reduction in  
traffic is why switching is replacing expensive routers and inefficient hubs as  
the ultimate networking solution. Switching brought a whole new way of  
thinking to networking.  
3
 
2. Hardware Description  
This Section describes the hardware of the Micro-Switch/24 Desktop Fast  
Ethernet Switch/.  
The physical dimensions of the Micro-Switch/24 are: 250mmx 133 mm x  
37mm (L x W x H)  
Front Panel  
The Front Panel of the Micro-Switch/24 consists of twenty-four (24)  
10/100Base-TX RJ-45 ports. The LED Indicators are also located on the  
front panel of the Switch.  
Figure 2-1. The Front panel  
RJ-45 ports (Auto MDI/MDIX): Twenty-four (24) 10/100Mbps auto-sensing  
ports for 10Base-T or 100Base-TX device connection.  
[Auto MDI/MDIX means that you can connect to another switch or  
workstation with either straight-through or crossover cabling.]  
LED Indicators  
The LED Indicators gives real-time information of systematic operation  
status. The following table provides descriptions of LED status.  
4
 
Figure 2-2. LED Indicators  
LED  
Status  
Description  
Green  
Off  
Power is supplied  
Power  
Power is not connected  
Green  
Blinks  
Off  
The port is connecting with the device  
The port is receiving or transmitting data  
No device attached  
LK/ACT  
Table 2-1. Descriptions of LED Indicators  
Rear Panel  
The 3-pronged power plug is located at the rear panel of the Micro-Switch/24  
as shown in Figure 2-3. The Switch will work with AC in the range 100-240V  
AC, 50-60Hz.  
Figure 2-3. The Rear Panel of the Micro-Switch/24  
5
 
Desktop Installation  
Set the Switch on a sufficiently large flat space with a power outlet nearby.  
The surface should be clean, smooth, level, and sturdy. Ensure there is  
enough clearance around the Switch to allow air circulation and the  
attachment of the power cord and cables.  
Attaching Rubber Feet  
A. Make sure mounting surface on the bottom of the Switch is grease and  
dust free.  
B. Remove adhesive backing from your Rubber Feet.  
C. Apply the Rubber Feet to each corner on the bottom of the Switch. These  
footpads protect the Switch from shock and vibration.  
Figure 2-4. Attaching Rubber Feet to each corner on the bottom of the Switch  
Power On  
Connect the power cord to the power socket on the rear panel of the Switch.  
The other side of power cord connects to the power outlet. The internal  
power supply in the Switch works with AC in the voltage range 100-240VAC,  
frequency 50~60Hz.Check the power indicator on the front panel to ensure  
that power is properly supplied.  
6
 
3.Network Application  
This section provides a few samples of network topology in which the Switch  
is used. In general, the Micro-Switch/24 Desktop Fast Ethernet Switch is  
designed as a segment switch. That is, with its large address table (4K MAC  
address) and high performance, it is ideal for interconnecting networking  
segments.  
You can also use the Micro-Switch/24 to connect PCs, workstations, and  
servers to each other by connecting these devices directly to the Switch. The  
switch automatically learns node addresses, which are subsequently used to  
filter and forward all traffic based on the destination address. The Switch can  
connect with another switch or hub to interconnect each of your small,  
switched workgroups to form a larger switched network.  
Small Workgroup  
The Micro-Switch/24 can be used as a standalone switch to which personal  
computers, servers, and printer servers are directly connected to form a  
small workgroup.  
Figure 3-1. Small Workgroup Application  
7
 
Segment Bridge  
For enterprise networks where large data broadcasts are constantly  
processed, this switch is an ideal solution for department users to connect to  
the corporate backbone.  
In the illustration below, two Ethernet switches with PCs, a print server, and  
a local server are both connected to the Micro-Switch/24. All devices in this  
network can then communicate with each other through the Micro-Switch/24.  
Connecting servers to the Switch allow other users to access the server’s  
data.  
Figure 3-2 Department Bridge Application  
8
 
4.Troubleshooting  
This section is intended to help you solve the most common problems on  
the Micro-Switch/24  
Incorrect connections  
Faulty or loose cables  
Look for loose or obviously faulty connections. If they appear to be OK,  
make sure the connections are snug. If this does not correct the  
problem, try a different cable.  
Non-standard cables  
Non-standard and miswired cables may cause numerous network  
collisions and other network problems that can seriously impair  
network performance. A Category 5 cable tester is a recommended  
tool for every 100Base-T network installation.  
Improper Network Topologies  
It is important to make sure that you have a valid network topology.  
Common topology faults include excessive cable length and too many  
repeaters (hubs) between end nodes. In addition, you should make  
sure that your network topology contains no data path loops. Between  
any two end nodes, there should be only one active cabling path at  
any given time. Data path loops will cause broadcast storms that will  
severely impact your network performance.  
9
 
Diagnosing LED Indicators  
The Switch can be easily monitored through panel indicators to assist  
in identifying common problems you may encounter and where you  
can find possible solutions.  
If the power indicator does not turn on when the power cord is plugged  
in, you may have a problem with power cord. Than check for loose  
power connections, power losses, or surges at power outlet. If you still  
cannot resolve the problem, contact your local dealer for assistance.  
Cabling  
RJ-45 ports: Use unshielded twisted-pair (UTP) or shielded twisted-  
pair ( STP ) cable for RJ-45 connections: 100m. Category 3, 4, or 5  
cable for 10Mbps connections or 100m. Category 5/5e cable for  
100Mbps connections. Also be sure that the length of any twisted-pair  
connection does not exceed 100 meters ( 328 feet ).  
10  
 
5.Technical Specification  
IEEE 802.3 10Base-T Ethernet,  
IEEE 802.3u 100Base-TX Fast Ethernet  
Standard  
IEEE802.3x Flow Control and Back-pressure  
Protocol  
CSMA/CD  
Technology  
Store and Forward switching architecture  
14,880 pps Ethernet port  
148,800 pps Fast Ethernet port  
Transfer Rate  
MAC address  
4K Mac address table  
1.25Mbits  
Memory Buffer  
10Base-T: 2-pair UTP/STP Cat. 3/4/5 cable  
EIA/TIA-568 100-ohm (up to 100m)  
Network Cable  
100Base-TX: 2-pair UTP/STP Cat. 5/5e cable  
EIA/TIA-568 100-ohm (up to 100m)  
Per port: Link/Activity  
Per unit: Power  
LED Indicators  
Back-plane  
4.8Gbps  
250mmx 133 mm x 37mm (L x W x H)  
9.85" x 4.45" x1.46"  
Dimensions  
Operational Temp.  
O˚ to 45˚ C (32˚ to 113˚ F)  
Operational  
Humidity  
10% to 90% (Non-condensing)  
100-240 VAC, 50~60Hz  
Power Supply  
11  
 
Power  
Consumption  
19 Watts (maximum)  
FCC Class A, CE  
EMI  
12  
 

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