Milan Technology Switch MIL S501MT 15 User Manual

MIL-S501xx Series  
5x 10/100 N-Way RJ-45 Ports  
plus One 100Base-FX fiber Port  
MIL-S501ST with ST connector (2km)  
MIL-S501SC with SC connector (2km)  
MIL-S501SC-15 with SC connector (15km)  
MIL-S501SC-40 with SC connector (40km)  
MIL-S501SC-70 with SC connector (70km)  
MIL-S501MT with MT-RJ connector (2km)  
MIL-S501MT-15 with MT-RJ connector (15km)  
MIL-S501VF with VF-45 connector (2km)  
MIL-S501VF-15 with VF-45 connector (15km)  
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Contents  
1. Introduction…….………………………….……….… 4  
Features …………………………………………..….….…… 5  
Package Contents ………………………..……………….... 6  
2. Hardware Description …………………..…..……… 7  
Front Panel …………………...……...………………….…… 7  
LED Indicators …………………...……...…………..….…… 8  
Rear Panel ……………………………………………………. 9  
3. Network Application ……………..……….………… 12  
Desktop Application …………………….…………...…..… 12  
Collapsed Backbone Application ………………….…..… 13  
4. Trouble Shooting .………………………..……….… 14  
5. Technical Specification .……………….…..…...… 16  
Appendix ……………….…………………….…....….… 17  
A-1. 100Base-T Technology Review …………….…...…….… 17  
A-2. Fast Switching Technology …………………...…………. 18  
3
 
1.  
Introduction  
Welcome to the World of Mini-Networking.  
In the modern business society, communication and sharing  
information is crucial. Computer networks have proven to be one  
of the fastest modes of communication.  
The MIL-S501xx is a compact desktop size switch that is an ideal  
solution for small office or home office network user. It provides  
wire-speed, Fast Ethernet switching function that allows high-  
performance, low-cost connection.  
Figure 1-1. The MIL-S501xx  
The MIL-S501xx provides 5 switched N-Way 10/100Mbps RJ-45  
Ethernet ports and one 100Base-FX fiber port.  
The Switch will automatically detect the speed of the device that  
you plug into it to allow you to use both 10 and 100Mpbs devices.  
The 10Mbps bandwidth will accommodate 10Mbps workgroup  
hubs while simultaneously providing the 100Mbps bandwidth  
needed to accommodate multimedia applications. The Switch  
features a store-and-forward switching and it can auto-learn and  
store source address on a 4K-entry MAC address table.  
The MIL-S501xx is a 5-port switch coupled with one 100Base-FX  
fiber port. There are 5 types of fiber connectors available for the  
convenience of your connectivity on the MIL-S501xxs.  
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These fiber connectors are ST, SC multi-mode, SC single-mode,  
MT-RJ, and VF-45. The fiber port can be used to connect to a  
remote site up to 2 kilometers (SC single-mode up to 70  
kilometers) away.  
Features  
n 5X 10/100Mbps Fast Ethernet UTP switch ports  
n MDI uplink port for easy expansion  
n One 100Mbps Fast Fiber port  
n 1 Dip-Switch to select fiber port full-duplex or half-duplex  
mode  
n N-Way auto-negotiation supported  
n Full-duplex and half-duplex supported  
n Store-and forward switching architecture for abnormal packet  
filtering  
n Full wire speed forwarding rate  
n 4K-entry MAC address table  
n 256KB Memory Buffer  
n LED-indicators for Power, 10/100M, LK/ACT, FD/COL  
statuses  
n Compact palm size – 6.5”  
Package Content  
n MIL-S501xx  
n Four Rubber Feet with adhesive pads  
n One DC power adapter  
n Warranty Card  
n User’s Manual  
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MIL-S501XX  
Rubber Feet  
DC power Adapter User’s Manual Warranty Card  
Figure1-2. Package Contents  
Compare the contents of your MIL-S501xx package with the  
standard checklist above. If any item is missing or damaged,  
please contact your local dealer for service.  
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2.  
Hardware Description  
This Section mainly describes the hardware of the MIL-S501xx.  
The MIL-S501xx is a compact palm size switch (6.5 inches) with  
5x 10/100 N-Way UTP switch ports plus one 100Baes-FX fiber  
port.  
The physical dimensions of the MIL-S501xx are:  
165mm x 100mm x 24mm  
6.50 in. x 3.94 in. x .95 in.  
Front Panel  
The LED indicators are located on the frond panel of the switch.  
They provide a real-time indication of systematic operation status.  
The Front Panel of the MIL-S501xx is displayed in Figure 2-1.  
Figure 2-1. The Front Panel of the MIL-S501xx  
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LED Indicators  
The following table provides descriptions of the LED statuses and meaning.  
LED Status Color  
Description  
Power  
On  
On  
Off  
Green The power of unit is On  
Green The port is operating at the speed of 100Mbps.  
In 10Mbps mode or no device attached  
100M  
On  
Green The port is successfully connecting with the device.  
LNK /  
ACT  
Blinks  
Off  
The port is receiving or transmitting data.  
No device attached.  
On  
Yellow The port is operating in Full-duplex mode.  
FDX /  
COL  
Blinks  
Off  
Collision of Packets occurs in the port.  
Half-duplex mode or no device attached.  
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Rear Panel  
The Rear Panel of the MIL-S501xx consists of 5x 10/100 N-Way  
UTP switch ports, Uplink Port, one 100Base-FX fiber port, 1 DIP-  
switch to select fiber port full-duplex or half-duplex mode, and DC  
power connector.  
There are five types of fiber connectors available for the  
convenience of your connectivity. These fiber connectors are ST,  
SC MMF, SC SMF, MT-RJ, and VF-45.  
MIL-S501xx with SC (multi-mode) Connector  
Figure 2-2. The Rear Panel of the MIL-S501xx with SC Connector  
MIL-S501xx with SC (single-mode) Connector  
Figure 2-3. The Rear Panel of the MIL-S501xx  
with SC (single-mode ) Connector  
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MIL-S501xx with ST Connector  
Figure 2-4. The Rear Panel of the MIL-S501xx with ST Connector  
MIL-S501xx with MT-RJ Connector  
Figure 2-5. The Rear Panel of the MIL-S501xx  
with MT-RJ Connector  
MIL-S501xx with VF-45 Connector  
Figure 2-6. The Rear Panel of the MIL-S501xx  
with VF-45 Connector  
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n RJ-45 Ports: Five 10/100 N-Way auto-sensing for 10Base-T  
or 100Baes-TX connections.  
n Uplink Port: One uplink port to cascade to a hub or switch,  
with the maximum distance between the switch to another  
device is 100 meters.  
n 100Base-FX Fiber Port: There are 5 types of fiber  
connectors available for the MIL-S501xx as shown above.  
The distance for fiber cabling can be extended up to 2  
kilometers for multi-mode fiber and up to 70 kilometers for  
single-mode fiber.  
n DIPswitch: the DIPswitch is to select Full duplex or Hall-  
duplex mode for the fiber port.  
n DC Power Connector: Plug DC Power Adapter’s female end  
into this device, and the male end of DC Power Adapter into  
an AC outlet. The Adapter supplies 5VDC at 2.5 Amps to the  
Switch.  
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3.  
Network Application  
This section provides you a few samples of network topology in  
which the Switch is used. In general, the MIL-S501xx is designed  
to be used as a desktop or segment switch.  
The Switch automatically learns node addresses, which are  
subsequently used to filter and forward all traffic based on the  
destination address.  
Desktop Application  
The MIL-S501xx is designed to be a compact desktop size switch  
that is an ideal solution for small workgroup. The Switch can be  
used as a standalone switch to which personal computers, server,  
printer server are connected to form small workgroup.  
Figure  
3-1.  
Desktop  
Application  
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Collapsed Backbone Application  
You can use Uplink port of the MIL-S501xx to connect with  
another hub or switch to interconnect each of your small-switched  
workgroups to form a larger switched network. You can also use  
fiber ports to connect switches. The distance between two  
switches via fiber cable can be up to 2Km with multi-mode fiber or  
70Km with single-mode fiber.  
The Up-link Port is the same port as port 1, but the pin  
assignment has been designed to contain crossover pinout. That  
is to say, you can connect this port to hub or switch without  
crossover cable.  
Figure 3-2. Collapsed Backbone Application  
In the above illustration, two MIL-S501xx are used to interconnect  
two small workgroups via fiber cable. All the devices in this  
network can communicate with each other. Connecting servers to  
the Switch allow other users to access the server’s data.  
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4.  
Trouble Shooting  
The Switch can be easily monitored through panel indicators to  
assist in identifying problems. This section describes common  
problems you may encounter and where you can find possible  
solutions.  
n Diagnosing LED Indicator  
If Link indicator does not light up after making a connection.  
You may check whether network interface (e.g., a network  
adapter card on the attached device), network cable, or  
switch port is defective or not. Verify that the switch and  
attached device are power on. Be sure the cable is plugged  
into both the switch and corresponding device. Verified the  
proper cable type is used and its length does not exceed  
specified limits.  
n Power  
If the power indicator does turn on when the power cord is  
plugged in, you may have a problem with power outlet, or  
power cord. However, if the Switch powers off after running  
for a while, 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.  
n Transmission Mode  
Verify that each port is set to the same transmission mode  
used by the attached device (i.e., half or full duplex). RJ-45  
port use auto-negotiation to set the transmission mode. If the  
attached device operates at half duplex, the default when  
auto-negotiation fails, then it does not have to support auto-  
negotiation.  
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n Cabling  
A. RJ-45 ports: Use unshielded twisted-pair (UTP) or shield  
twisted-pair (STP) cable for RJ-45 connections: Category3, 4  
or 5 cable for 10Mbps connections or Category 5 cable for  
100Mbps connections. Also be sure that the length of any  
twisted-pair connection does not exceed 100 meters (328  
feet).  
B. 100Base-FX fiber port: Fiber multi-mode connector type  
must use 62.5/125 um multi-mode fiber cable. You can  
connect two devices over a 2-kilometer distance. [Fiber  
single-mode connector type must use 9/125 um single- mode  
fiber cable. You can connect two devices over a 70- kilometer  
distance in full duplex operation. ]  
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5.  
Technical Specification  
Specification  
Standards  
IEEE 802.3 10Base-T Ethernet,  
Compliance  
IEEE 802.3u 100Base-TX/FX Fast Ethernet  
ANSI/IEEE 802.3 N-Way auto-negotiation  
CSMA/CD  
Protocol  
Max Forwarding Rate 14,880 pps per Ethernet port,  
and  
148,800 pps per Fast Ethernet port  
Max Filtering Rate  
LED Indicators  
Per Port: 5 port N-Way: 100M, LK/ACT, FD/COL  
(3 LEDs)  
100M Fiber: LK/ACT, FD/COL (3 LEDs)  
Per Unit: Power  
Network Cables  
10Base-T: 2-pair UTP Cat. 3, 4, 5 cable (100m),  
EIA/TIA-568 100-ohm STP (100m)  
100Base-TX: 2-pair UTP Cat. 5 cable (100m),  
EIA/TIA-568 100-ohm STP (100m)  
100Base-FX: 50, 62.5/125 micron multi-mode  
fiber-optics (2Km)  
8,9/125 micron single-mode fiber-optics (70Km)  
ST/SC/MT-RJ/VF-45 Multi-mode: Full-duplex-  
2Km, Half-duplex- 412m  
Fiber Link Max.  
Distance  
SC Single-mode: Full-duplex- 60Km,  
Half-duplex- 412m  
Dimensions  
165mm x 100mm x 24mm (L x W x H)  
0ºC to 45ºC (32ºF to 113ºF)  
Operational  
Temperature  
Operational Humidity 10% to 90% (Non-condensing)  
External Power  
Supply  
5V, 2.5A  
Power Consumption 5.5 Watt  
EMI  
FCC Class B, CE Mark  
UL, TUV, CSA  
Safety  
16  
 
Appendix  
What is Switch Ethernet ?  
With a high-speed backplane, it is possible to have all ports  
communicating at wire speed with minimal latency and low  
packet loss  
A-1. 100Base-T Technology Review  
The 100BaseT standard retains 10BaseT's critical 100-meter  
maximum cable length between the hub and desktop. With  
100BaseT, the maximum number of repeater Hubs is two. This is  
due to the accelerated Ethernet data rate, which requires a  
reduction in network diameter in order to detect collisions. Class II  
repeaters must be used to build a two-repeater-stack LAN. In a  
single-repeater-stack LAN, Class I or Class II repeaters can be  
used. Whether the repeater is Class I or Class II is determined by  
how much delay is added by the repeater. Most stackable  
repeaters are Class I, while non-stackable are usually Class II.  
With 100BaseT,the maximum network diameter is approximately  
205 meters with UTP cable and 412 meters with fiber cable. By  
contrast, a maximum of four repeater hubs is allowed for  
10BaseT, providing a maximum network diameter of 500 meters  
on UTP.  
The 100BaseT standard is comprised of five component  
specifications - Media Access Control (MAC) layer, Media  
Independent Interface (MII) layer and the three physical layers  
(100BaseTX, 100BaseT4 and 100Base FX). 100BaseTX use the  
same IEEE 802.3 CSMA/CD MAC protocol layer as 10BaseT and  
a similar star topology. There are three distinct cabling variations  
in the 100BaseT standard.  
They are: *100BaseTX for two-pair data grade Category 5 UTP or  
Type 1 STP  
17  
 
*100BaseT4 for four-pair voice and data grade Category 3,4 or 5  
UTP  
*100BaseFX for 2-strand multimode fiber  
Media Access Control (MAC) Layer  
The MAC layer is based on the same CSMA/CD protocol as  
10Mbps Ethernet. The only difference is that it runs 10times  
faster.  
Media Independent Interface (MII) Layer  
The MII is a new specification that defines a standard interface  
between the MAC layer and any of the three physical layers  
(100BaseTX, 100BaseT4 or 100BaseFX). It is capable of  
supporting both 10Mbos and 100Mbps data rates.  
100BaseTX Physical Layer  
This physical layer defines the specification for 100BaseT  
Ethernet over two pairs of Category 5 UTP or Type 1 STP twisted  
pair wire. With one pair for transmit and the other for receive, the  
wiring scheme is identical to that used for 10BaseT Ethernet. The  
UTP connector, a RJ-45, is also identical to the one used for  
10BaseT Ethernet. However, the punch-down blocks in the wiring  
closet must be category 5 certified  
A-2. Fast Switching Technology  
There are two big LAN killers: increased demands that new  
technology, such as multimedia and videoconferencing, places on  
available bandwidth; and the distributed computing architecture  
trend being driven by mature implementations of the client/server  
model of corporate computing. With a high-speed switch  
backplane, it is possible to have all ports communicating at wire  
speed with minimal latency and low packet loss.  
18  
 
A switch is an intranetwork device designed to increase  
performance through LAN segmentation. Switching uses  
microsegmentation to isolate traffic. Upon arrival at the hub, a  
packet's destination address is read and the packet is sent  
directly to the relevant port - not to all ports, as it would be with a  
repeater.  
For networks experiencing a shortage of bandwidth, the  
introduction of a 10Mbps switch will only move the bottleneck  
from the hub to the 10Mbps-server pipe. A minimal improvement  
will be apparent, due mainly to the decrease in the number of  
packet collisions.  
To significantly increase performance it is necessary to open up  
the pipe to the server. In the past this was achieved by  
segmenting the network and installing multiple NICs in the server,  
or putting the server on a high-speed backbone such as FDDI.  
Vendors have now integrated a Fast Ethernet downlink into the  
switch for connection to either the server or backbone. Depending  
on your circumstances, this can result in a seven to eight-fold  
increase in performance.  
As a technology it is easier and cheaper to implement than FDDI  
and will run on both multimode fiber and category 5 cabling. Links  
can also be made directly to servers, hubs/switches and power  
users without the need for costly hardware or recabling. However,  
Fast Ethernet is not suitable for a campus-wide backbone as it  
suffers from hop and distance limitations, as well as not providing  
the redundancy of FDDI and ATM.  
How Fast Ethernet is implemented depends on the structure of  
your environment, the location of users and servers and the use  
of virtual LANs, which allow users to be associated with a specific  
workgroup regardless of physical location. This is particularly  
important if you have client/server databases being accessed  
throughout your organization, or staff in various locations sharing  
large amounts of data.  
19  
 
Store-and-Forward Switching  
Store-and-forward switching is the best choice to keep the  
network effective and reliable. Store-and-forward provides  
excellent error-checking function. For example, CRC, runt and  
collision filter.  
Store-and-Forward reads the entire data packet, verifies the  
packet and sends it to the destination port. No bad packets on  
network, packets can be switched between different network  
speeds. Store-and-forward latency is the same as sending a  
complete packet, so you will need to consider this latency when  
you test the performance.  
Full-duplex  
Full duplex is a transmission method that effectively doubles the  
bandwidth of a link between a network card and a switch. It  
disables the collision detection mechanism, so the card and the  
switch can transmit and receive concurrently at full wire speed on  
each of the transmit and receive paths. A full-duplex segment can  
use the same Category 5 UTP cable used by 10BaseT Ethernet  
and Fast Ethernet.  
20  
 

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