Alloy Computer Products Switch NS 16T User Manual

User Manual  
NS-16T  
16 Port Fast Ethernet Switch  
NS-24T  
24 Port Fast Ethernet Switch  
Version: 1.01  
Feb 14, 2006  
 
Table of Contents  
About this User Manual…………………………………………………1  
Overview of the User Manual………………………………………………1  
Terms Used…………………………………………………………………..1  
Introduction……………………………………………………………….2  
Fast Ethernet Technology…………………………………………………...2  
Switching Technology………………………………………………………..2  
Features……………………………………………………………………….3  
Unpacking and Installation………………………………………………4  
Unpacking……………………………………………………………………..4  
Installation……………………………………………………………………..4  
Rack Mounting………………………………………………………………..5  
Identifying External Components……………………………………….6  
Front Panel…………………………………………………………………….6  
Rear Panel……………………………………………………………………..6  
Technical Specifications………………………………………………….7  
 
Caution  
Electronic Circuit devices are sensitive to static electricity. Dry weather conditions or walking  
across a carpeted floor may cause you to acquire a static electrical charge.  
To protect your switch, always:  
Touch the metal chassis of your computer to ground the static electrical charge before  
you handle the switch.  
Pick up the switch by holding it on the left and right edges only.  
Electronic Emission Notices  
Federal Communications Commission (FCC) Statement  
This equipment has been tested and found to comply with the limits for a Class A computing  
device pursuant to Subpart J of Part 15 of FCC Rules, which are designed to provide  
reasonable protection against such interference when operated in a commercial environment.  
European Community (CE) Electromagnetic Compatibility Directive  
This equipment has been tested and found to comply with the protection requirements of  
European Emission Standard EN55022/EN60555-2 and the Generic European Immunity  
Standard EN50082-1.  
EMC:  
EN55022(1988)/CISPR-  
class A  
22(1985)  
EN60555-2(1995)  
EN60555-3  
class A  
IEC1000-4-2(1995)  
IEC1000-4-3(1995)  
4K V CD, 8KV, AD  
3V/m  
1KV – (power line), 0.5KV – (signal  
line)  
IEC1000-4-4(1995)  
Australian C-Tick Compliance.  
This equipment is compliant with the required Australian C-Tick standards  
ii  
 
About this User Manual  
This User Manual will guide you on procedures to install Alloy 16 port Fast Ethernet (NS-  
16T) and 24 port (NS-24T) Fast Ethernet Switch models.  
The two models NS-16T and NS-24T differ in terms of port density – the former model  
offering 16x 10/100Mbps Fast Ethernet ports, and the latter 24x ports of the same  
specification. In all other respects the two models share identical characteristics.  
Overview of the User Manual  
Chapter 1 “Introduction” describes the features of NS-16T and NS-24T Fast Ethernet  
switches  
Chapter 2 “Unpacking and Installation”  
Chapter 3 “Identifying External Components”  
Chapter 4 “Technical Specifications”  
Terms Used  
16/24 Port Fast Ethernet Switches:  
This term is used when discussing information that relates to both NS-16T 16 port and NS-  
24T 24 port Fast Ethernet Switch models  
NS-16T:  
This term is used when discussing information that relates to the 16 port Fast Ethernet  
switch.  
NS-24T:  
This term is used when discussing information that relates to the 24 port Fast Ethernet  
switch.  
1
 
Introduction  
This chapter describes the features of the Switch and some background information about  
Ethernet/Fast Ethernet switching technology.  
Fast Ethernet Technology  
The growing importance of LANs and the increasing complexity of desktop computing  
applications are fueling the need for high performance networks. A number of high-speed  
LAN technologies have been proposed to provide greater bandwidth and improve  
client/server response times. Among them, 100BASE-T (Fast Ethernet) provides a non-  
disruptive, smooth evolution from the current 10BASE-T technology.  
100Mbps Fast Ethernet is a standard specified by the IEEE 802.3 LAN committee. It is an  
extension of the 10Mbps Ethernet standard with the ability to transmit and receive data at  
100Mbps, while maintaining the CSMA/CD Ethernet protocol. Since 100Mbps Fast Ethernet  
is compatible with all other 10Mbps Ethernet environments, it provides a straightforward  
upgrade and takes advantage of the existing investment in hardware, software, and  
personnel training.  
Switching Technology  
Another approach to pushing beyond the limits of Ethernet technology is the development of  
switching technology. A switch bridges Ethernet packets at the MAC address level of the  
Ethernet protocol transmitting among connected Ethernet or Fast Ethernet LAN segments.  
Switching is a cost-effective way of increasing the total network capacity available to users  
on a local area network. A switch increases capacity and decreases network loading by  
dividing a local area network into different segments, which don’t compete with each other  
for network transmission capacity.  
The switch acts as a high-speed selective bridge between the individual segments. The  
switch, without interfering with any other segment, automatically forwards traffic that needs  
to go from one segment to another. By doing this the total network capacity is multiplied,  
while still maintaining the same network cabling and adapter cards.  
For Fast Ethernet networks, a switch is an effective way of eliminating problems of chaining  
hubs beyond the “two-repeater limit.” A switch can be used to split parts of the network into  
different collision domains, making it possible to expand your Fast Ethernet network beyond  
the 205-meter network diameter limit for 100BASE-TX networks. Switches supporting both  
traditional 10Mbps Ethernet and 100Mbps Fast Ethernet are also ideal for bridging between  
the existing 10Mbps networks and the new 100Mbps networks.  
Switching LAN technology is a marked improvement over the previous generation of  
network bridges, which were characterised by higher latencies. Routers have also been  
used to segment local area networks, but the cost of a router, the setup and maintenance  
required make routers relatively impractical. Today switches are an ideal solution to most  
kinds of local area network congestion problems.  
2
 
Features  
The 16/24 Port Fast Ethernet Switches were designed for ease of installation and high  
performance in an environment where traffic on the network and the number of users  
increase continuously.  
The Switch with its 19” standard rack size is specifically designed for middle to large  
workgroups. The Switch provides immediate access to a rapidly growing network through a  
wide range of user-reliable functions.  
The Switch is ideal for deployment with multiple high-speed servers for shared bandwidth  
10Mbps or 100Mbps workgroups. With the highest bandwidth 200Mbps (100Mbps full-  
duplex mode), any port can provide workstations with a congestion-free data pipe for  
simultaneous access to the server.  
The Switch is expandable by cascading two or more switches together. As all ports support  
200Mbps, the Switch can be cascaded from any port and to any number of switches.  
The Switch is a perfect choice for site planning to upgrade to Fast Ethernet in the future.  
Ethernet workgroups can connect to the Switch now, and change adapters and hubs  
anytime later without needing to change the Switch or reconfigure the network.  
The Switch combines dynamic memory allocation with store-and-forward switching to  
ensure that the buffer is effectively allocated for each port, while controlling the data flow  
between the transmit and receive nodes to guarantee against all possible packet loss.  
Other key features are:  
16/24-port 10/100Mbps Fast Ethernet Switch with RJ-45 connectors  
Supports Auto-negotiation for speed and duplex modes on each port  
Supports Auto-MDI/MDI-X for each port  
Wire speed reception and transmission  
Store-and-Forward switching technology  
Integrated address Look-Up Engine, supports 8K absolute MAC addresses  
Supports 1.25Mbits of RAM for data buffering  
Front-panel diagnostic LED’s  
Broadcast storm protection  
IEEE 802.3x flow control for full-duplex  
Back pressure flow control for half-duplex  
Standard 19” Rack-mountable size  
3
 
Unpacking and Installation  
This chapter provides unpacking and setup information for the 16/24 Port Fast Ethernet  
switches.  
Unpacking  
Before you start installing your switch, verify that the package contains the following:  
A NS-16T or NS-24T Fast Ethernet Switch  
Mounting Accessories (for 19” Rack Shelf mounting)  
This Users Manual CD-ROM  
AC Power Cord  
Please notify your supplier immediately if any of the aforementioned items are missing or  
damaged.  
Installation  
The site where you install the 16/24 Port Fast Ethernet Switch may greatly affect its  
performance. When installing, consider the following pointers:  
Install the Switch in a fairly cool and dry place. See Specifications for the acceptable  
temperature and humidity operating ranges.  
Install the Switch in a site free from strong electromagnetic field generators (such as  
motors), vibration, dust, and direct exposure to sunlight.  
Leave at least 10cm of space at the front and rear of the switch for ventilation.  
Install the Switch on a sturdy, level surface that can support its weight, or in an EIA  
standard-size equipment rack. For information on rack installation, see the next section,  
Rack mounting.  
When installing the Switch on a level surface, attach the rubber feet to the bottom of each  
device. The rubber feet cushion the hub and protect the hub case from scratching.  
4
 
Rack Mounting  
The 16/24 Port Fast Ethernet Switch can be mounted in an EIA standard-size, 19-inch rack,  
which can be placed in a wiring closet with other equipment. Attach the mounting brackets  
to the switch’s front panel (one on each side), and secure them with the provided screws.  
Then, use screws provided with the equipment rack to mount each switch in the rack.  
5
 
Identifying External Components  
This section identifies all the major external components of the switch.  
Front Panel  
The figures below show the front panels of each of the switches.  
9
10  
11  
12  
13  
14  
15  
16  
1
2
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
15  
16  
Power  
LINK  
100Mbps  
1
2
3
4
5
6
7
8
16-port 10/100Mbps Fast Ethernet Switch  
24-port 10/100Mbps Fast Ethernet Switch  
LED Indicator Panel  
16-port 10/100Mbps Fast Ethernet Switch  
24-port 10/100Mbps Fast Ethernet Switch  
Power (PWR)  
This indicator lights green when the switch is receiving power, otherwise, it is off.  
Link / Activity ( green )  
This indicator lights green when the port is connected to a Fast Ethernet or Ethernet station,  
if the indicator is blinking green then traffic is present on the port.  
100Mbps ( green )  
This LED indicator lights green when the port is connected to a 100Mbps Fast Ethernet  
station. Otherwise, the LED is off when the port is connected to a 10Mbps Ethernet station.  
Rear Panel  
The figure below shows the rear panel of the 16/24 Port Fast Ethernet switches.  
AC Power Connector  
6
 
Technical Specifications  
General  
IEEE 802.3 10BASE-T Ethernet  
IEEE 802.3u 100BASE-TX Fast Ethernet  
CSMA/CD  
Standards  
Protocol  
Ethernet: 10Mbps (half duplex), 20Mbps (full-duplex)  
Fast Ethernet: 100Mbps (half duplex), 200Mbps (full-  
duplex)  
Data Transfer Rate  
Topology  
Star  
10BASET: 2-pair UTP Cat. 3,4,5, EIA/TIA- 568 100-ohm  
STP  
100BASE-TX: 2-pair UTP Cat. 5, EIA/TIA-568 100-ohm  
STP  
Network Cables  
16 x 10/100Mbps Auto-MDI ports (NS-16T)  
24 x 10/100Mbps Auto-MDI ports (NS-24T)  
Physical and Environmental  
Number of Ports  
AC inputs  
100 to 240 VAC, 50 or 60 Hz internal universal power  
supply  
Power Consumption  
Temperature  
Humidity  
Dimensions  
EMI:  
6 watts. (max.)  
Operating: 0° ~ 40° C, Storage: -10° ~ 70° C  
Operating: 10% ~ 90%, Storage: 5% ~ 90%  
440 x 140 x 44 mm (W x H x D)  
FCC Class A, CE Mark Class A, VCCI Class A  
CUL, CB  
Safety  
Performance  
Transmit Method:  
RAM Buffer:  
Filtering Address Table:  
Store-and-forward  
1.25Mbits per device  
8K entries per device  
Packet Filtering/Forwarding Rate: 10Mbps Ethernet: 14,880/pps  
100Mbps Fast Ethernet: 148,800/pps  
MAC Address Learning:  
Automatic update  
7
 

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