3Com Router WL-537 User Manual

							
E
END USER SOFTWARE LICENSE
AGREEMENT
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126APPENDIX E: END USER SOFTWARE LICENSE AGREEMENT
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F
ISP INFORMATION
Information 
Regarding Popular 
ISPs
WAN TypesCharacteristicsPopular ISPs
Dynamic IP
(Clone MAC)Cable modem ISP, non-hostname 
based. Need to clone the MAC 
address in the Advanced tab of 
the Internet Settings page.MediaOne, RoadRunner, 
Optimum Online, Time Warner, 
Charter, Adelphia, Metrocast.
Dynamic IP
(Hostname)Cable ISP, Requires Hostname to 
authenticate ie. cx213818-B. 
Need to enter the hostname in the 
Internet Settings page.@Home Network, Cogoco, 
ComCast, Cox, Excite, Rogers, 
Shaw, Insight, Videotron
PPPoE
(DSL)Usually special software installed 
on PC, MacPOET/WinPOET, 
EnterNet 300. The Router has this 
software built in and you can 
remove it from your PC. You will 
need to enter the user name and 
password that your ISP provided 
to you in the PPPoE page of the 
Router. Leave the service name 
blank unless your ISP requires it.Bell*, Century Tel, Citizens, 
Primus, Prodigy, Snet, Sprint FC, 
Verizon, First World, Brightnet, 
Earthlink, Ameritech, Covad, 
Mindspring, Sympatico DSL, 
USwest, Owest, SNet
PPTPCable or DSL, always on. Some 
European ISPs require a PPTP 
tunnel to authenticate their 
network.KPN (Netherlands), Austria 
Telecom 
						

							
128APPENDIX F: ISP INFORMATION
*Bell includes Bell Advantage, Bell Canada, Bell South, PacBell and 
Southwestern Bell.
Static
(DSL)DSL Modem, always on. Need to 
enter ALL IP information from ISP 
in the Static IP address section of 
the Internet Settings page.CableSpeed, Cnet, Direct Link, 
Drizzle, DSL Extreme, Earthlink 
Wireless, Fast Point, Flashcom, 
GTE-WhirlWind, Heavenet, HSA 
Corp, I-55, InterAccess, LinkLine, 
Mission, Nauticom, NAS, Omitel, 
Onterra, Phatpipe, Rhythms, 
Speakeasy, Sterling, XO, Zyan
Static
(Cable)Cable Modem, Always on, ISP 
assigns specific IP information 
which needs to be entered on the 
“Fixed IP” page of the Router.Cox Cable, Sprint, US Cable, 
Cable-Cable 
						

							
GLOSSARY
802.11bThe IEEE specification for wireless Ethernet which allows speeds of up to 
11 Mbps. The standard provides for 1, 2, 5.5 and 11 Mbps data rates. 
The rates will switch automatically depending  on range and environment.
802.11g The IEEE specification for wireless Ethernet which allows speeds of up to 
54 Mbps. The standard provides for 6, 12, 24, 36, 48 and 54 Mbps data 
rates. The rates will switch automatically depending on range and 
environment.
10BASE-T The IEEE specification for 10 Mbps Ethernet over Category 3, 4 or 5 
twisted pair cable.
100BASE-TX The IEEE specification for 100 Mbps Fast Ethernet over Category 5 
twisted-pair cable. 
Access Point An Access Point is a device through which wireless clients connect to 
other wireless clients and which acts as a bridge between wireless clients 
and a wired network, such as Ethernet. Wireless clients can be moved 
anywhere within the coverage area of  the access point and still connect 
with each other. If connected to an Ethernet network, the access point 
monitors Ethernet traf fic and forwards appropriate Ethernet messages to 
the wireless network, while al so monitoring wireless client radio traffic 
and forwarding wireless client messages to the Ethernet LAN.
Ad Hoc mode Ad Hoc mode is a configuration supported by most wireless clients. It is 
used to connect a peer to peer network toget her without the use of an 
access point. It offers lower performance than infrastructure mode, which 
is the mode the Router uses. (see also Infrastructure mode.)
Auto-negotiation Some devices in the OfficeConne ct range support auto-negotiation. 
Auto-negotiation is where two devices sharing a link, automatically  
						

							
130GLOSSARY
configure to use the best common speed. The order of preference (best 
first) is: 100BASE-TX full duplex, 1 00BASE-TX half duplex, 10BASE-T full 
duplex, and 10BASE-T half duplex. Au to-negotiation is defined in the IEEE 
802.3 standard for Ethernet and is an operation that takes place in a few 
milliseconds.
Bandwidth The information capacity, measured in bits per second, that a channel can 
transmit. The bandwidth of Ethernet is  10 Mbps, the bandwidth of Fast 
Ethernet is 100 Mbps. The bandwidth for 802.11b wireless is 11Mbps.
Category 3 Cables One of five grades of Twisted Pair (TP) cabling defined by the EIA/TIA-586 
standard. Category 3 is voice grade cable  and can only be used in 
Ethernet networks (10BASE-T) to transmit  data at speeds of up to 10 
Mbps. 
Category 5 Cables One of five grades of Twisted Pair (TP) cabling defined by the EIA/TIA-586 
standard. Category 5 can be used in Eth ernet (10BASE-T) and Fast 
Ethernet networks (100BASE-TX) and  can transmit data up to speeds of 
100 Mbps. Category 5 cabling is  better to use for network cabling than 
Category 3, because it supports both Ethernet (10 Mbps) and Fast 
Ethernet (100 Mbps) speeds.
Channel Similar to any radio device, the OfficeConnect Cable/DSL Router allows 
you to choose different radio channels in the wireless spectrum. A 
channel is a particular frequency with in the 2.4GHz spectrum within 
which the Router operates.
Client The term used to described the desktop PC that is connected to your 
network. 
DDNS Dynamic Domain Name Server. A method that enables Internet users to 
tie their domain name(s) to comp uters or servers. DDNS enables a domain 
name to follow an IP address automatically when the IP address changes.
DHCP Dynamic Host Configuration Protocol. This  protocol automatically assigns 
an IP address for every computer  on your network. Windows 95, 
Windows 98 and Windows NT 4.0  contain software that assigns IP 
addresses to workstations on a networ k. These assignments are made by 
the DHCP server software that run s on Windows NT Server, and Windows  
						

							
GLOSSARY131
95 and Windows 98 will call the server to obtain the address. Windows 
98 will allocate itself an address if no DHCP server can be found.
DNS Server Address DNS stands for Domain Name System, which allows Internet host 
computers to have a domain name (such as 3c om.com) and one or more 
IP addresses (such as 192.34.45.8). A DNS server keeps a database of 
host computers and their respective domain names and IP addresses, so 
that when a domain name is requested (as in typing “3com.com” into 
your Internet browser), the user is sent  to the proper IP address. The DNS 
server address used by the compute rs on your home network is the 
location of the DNS server your ISP has assigned.
DSL modem DSL stands for digital subscriber line.  A DSL modem uses your existing 
phone lines to send and receive data at high speeds.
Encryption A method for providing a level of security to wireless data transmissions. 
The OfficeConnect Cable/DSL Router and Wireless Cable/DSL Router offer 
a choice of encryption methods. See “WPA” and “WEP” for details.
ESSID Extended Service Set Identifier. The ESSID  is a unique identifier for your 
wireless network. You must have the same ESSID entered into the Router 
and each of it's wireless clients.
Ethernet A LAN specification developed jointly by Xerox, Intel and Digital 
Equipment Corpor ation. Ethernet networks use  CSMA/CD to transmit 
packets at a rate of 10 Mbps over a variety of cables.
Ethernet Address See MAC address.
Fast Ethernet An Ethernet system that is designed to operate at 100 Mbps.
Firewall Electronic protection that prevents  anyone outside of your network from 
seeing your files or damaging your computers.
Full Duplex A system that allows packets to be transmit ted and received at the same 
time and, in effect, doubles the potential  throughput of a link. 
						

							
132GLOSSARY
Router A device that acts as a central  hub by connecting to each computer's 
network interface card and managing the  data traffic between the local 
network and the Internet.
Half Duplex A system that allows packets to transmitted and received, but not at the 
same time. Contrast with full duplex. 
Hub A device that regenerates LAN traffic so  that the transmission distance of 
that signal can be extended. Hubs are similar to repeaters, in that they 
connect LANs of the same type; however they connect more LANs than a 
repeater and are gener ally more sophisticated.
IEEE Institute of Electrical and  Electronics Engineers. This American 
organization was founded in 1963 and sets standards for computers and 
communications.
IETF Internet Engineering Task Force. An organization responsible for 
providing engineering solutions for  TCP/IP networks. In the network 
management area, this group is responsible  for the development of the 
SNMP protocol.
Infrastructure mode Infrastructure mode is the wireless configuration supported by the Router. 
You will need to ensure all of your clients are set up to use infrastructure 
mode in order for them to communicate with the Access Point built into 
your Router. (see also Ad Hoc mode)
IP Internet Protocol. IP is a layer 3 network protocol that is the standard for 
sending data through a network. IP is part of the TCP/IP set of protocols 
that describe the routing of packets to addressed devices. An IP address 
consists of 32 bits divided into two or three fields: a network number and 
a host number or a network number, a subnet number, and a host 
number.
IP Address Internet Protocol Address. A unique  identifier for a device attached to a 
network using TCP/IP. The address is wr itten as four octets separated with 
periods (full-stops), and is made up of  a network section, an optional 
subnet section and a host section. 
						

							
GLOSSARY133
ISPInternet Service Provider. An ISP is a business that provides connectivity to 
the Internet for individuals and ot her businesses or organizations.
LAN Local Area Network. A network of end stations (such as PCs, printers, 
servers) and network devices (hubs and switches) that cover a relatively 
small geographic area (usually not larger than a  floor or building). LANs 
are characterized by high transmission speeds over short distances (up to 
1000 metres).
MAC Media Access Control. A protocol specified by the IEEE for determining 
which devices have access to a network at any one time.
MAC Address Media Access Control Address. Also called the hardware or physical 
address. A layer 2 address associated with a particular network device. 
Most devices that connect to a LAN have a MAC address assigned to 
them as they are used to identify other  devices in a network. MAC 
addresses are 6 bytes long. 
NAT Network Address Translation. NAT enables all the computers on your 
network to share one IP address. The NAT capability of the Router allows 
you to access the Internet from any computer on your home network 
without having to purchase more IP addresses from your ISP.
Network A Network is a collection of comput ers and other computer equipment 
that are connected for the purpose  of exchanging information or sharing 
resources. Networks vary in size, some are within a single room, others 
span continents.
Network Interface Card (NIC) A circuit board installed into a piece of computing equipment, for 
example, a computer, that enables you to connect it to the network. A 
NIC is also known as an adapter or adapter card.
Protocol A set of rules for communication between devices on a network. The 
rules dictate format, timing, sequencing and error control.
PPPoE Point-to-Point Protocol over Ethernet.  Point-to-Point Protocol is a method 
of data transmission originally created for dial-up connections; PPPoE is 
for Ethernet connections. 
						

							
134GLOSSARY
PPTP Point-to-Point Tunneling Protocol is a method of secure data transmission 
between two remote sites over the internet.
RIP Routing Information Protocol. RIP a llows an administrator to set up 
routing information on one RIP enab led device, and have that routing 
information replicated to all RIP enabled devices on the network. 
RJ-45 A standard connector used to connect Ethernet networks. The “RJ” 
stands for “registered jack”.
Server A computer in a network that is shar ed by multiple end stations. Servers 
provide end stati ons with access to shared network services such as 
computer files and printer queues.
SPI Stateful Packet Inspection. This feature requires the firewall to remember 
what outgoing requests have been sent and only allow responses to 
those requests back through the firewall. This way, un-requested 
attempts to access the network will be denied.
SSID Service Set Identifier. Some vendors of wireless products use SSID 
interchangeably with ESSID.
Subnet Address An extension of the IP addressing scheme that allows a site to use a single 
IP network address for multiple physical networks. 
Subnet mask A subnet mask, which may be a part of the TCP/IP information provided 
by your ISP, is a set of four numb ers configured like an IP address. It is 
used to create IP address numbers use d only within a particular network 
(as opposed to valid IP address num bers recognized by the Internet, 
which must assigned by InterNIC).
Subnets A network that is a co mponent of a larger network. 
Switch A device that interconnects several LANs to form a single logical LAN that 
comprises of several LAN segments. Switches are similar to bridges, in 
that they connect LANs of a different type; however they connect more 
LANs than a bridge and are generally more sophisticated.