3Com Router WL-602 User Manual

Wireless Networking129
unsure try relocating both the wireless computers and the Router to 
establish whether this problem exists.
■Most wireless computer adapters will scan the channels for the 
wireless Router. If a wireless computer has not located the Router then 
try initiating a search manually if the client software supports this 
feature or manually set the channel on your wireless computer to 
correspond to the Router channel number. Please refer to your 
wireless computer adapter documentation...

130CHAPTER 6: TROUBLESHOOTING
Recovering from 
Corrupted SoftwareIf the system software has become corrupted, the Router will enter a 
“recovery” state; DHCP is enabled, and the LAN IP address is set to 
192.168.1.1. Follow the instructions below to upload a new copy of the 
system software to a Router unit in this state.
Ensure that one of your computers has a copy of the new software image 
file stored on its hard disk or available on CD-ROM.
Check on www.3com.com for the latest version firmware....

Power Adapter131
■Ensure the power adapter is correctly fitted into the power outlet 
socket and that the socket switch is turned on if applicable.
■Ensure you are using only the 3Com power adapter supplied with the 
Router.
If there is still no power, contact 3Com Technical Support and ask for 
assistance
Caution: Only use the power adapter supplied with the Router or a 
replacement 3Com power adapter. Do not use any other power adapter.
For reference, the part number for the power adapter supplied for...

132CHAPTER 6: TROUBLESHOOTING
Frequently Asked 
QuestionsHow do I reset the Router to Factory Defaults?
See Forgotten Password and Reset to Factory Defaults on 
page 127.
How many computers on the LAN does the Router support?
Up to a maximum number of 253 total users on the LAN are 
supported. Please note that the maximum number of users 
supported will be vary depending on the amount of traffic that 
each user generates.
How many wireless clients does the Router support?
Up to 32 wireless clients are...

A
IP ADDRESSING
The Internet 
Protocol SuiteThe Internet Protocol suite consists of a well-defined set of 
communications protocols and several standard application protocols. 
Transmission Control Protocol/Internet Protocol (TCP/IP) is probably the 
most widely known and is a combination of two of the protocols (IP and 
TCP) working together. TCP/IP is an internationally adopted and 
supported networking standard that provides connectivity between 
equipment from many vendors over a wide variety of...

134APPENDIX A: IP ADDRESSING
For your network to work correctly, all devices on the network must have:
■The same sub-network address.
■The same subnet mask.
The only value that will be different is the specific host device number. 
This value must always be unique.
An example IP address is ‘192.168.100.8’. However, the size of the 
network determines the structure of this IP address. In using the Router, 
you will probably only encounter two types of IP address and subnet 
mask structures.
Ty p e  O n e...

How does a Device Obtain an IP Address and Subnet Mask?135
This type of IP Address operates on a subnet mask of ‘255.255.0.0’.
See Ta b l e 4 for an example about how a network (only four computers 
represented) and a Router might be configured.
Ta b l e 4    IP Addressing and Subnet Masking
How does a Device 
Obtain an IP 
Address and Subnet 
Mask?There are three different ways to obtain an IP address and the subnet 
mask. These are:
■Dynamic Host Configuration Protocol (DHCP) Addressing
■Static...

136APPENDIX A: IP ADDRESSING
an IP address at random from the industry standard subnet of 
169.254.x.x (with a subnet mask of 255.255.0.0). If two devices allocate 
themselves the same address, the conflict is detected and one of the 
devices allocates itself a new address. 
Automatic IP addressing support was introduced by Microsoft in the 
Windows 98 operating system and is also supported in Windows 2000 
and Windows XP. 

B
TECHNICAL SPECIFICATIONS
This section lists the technical specifications for the 3Com Wireless 11n 
Cable/DSL Firewall Router.
3Com Wireless 11n 
Cable/DSL Firewall 
RouterInterfaces
WAN connection — one 10 Mbps/100Mbs dual speed Ethernet port 
(10BASE-T/100BASE-TX)
LAN connection — four 10 Mbps/100 Mbps dual speed Ethernet ports 
(10BASE-T/100BASE-TX)
Antenna 
Two external Dipole antennas for TX/RX function and the gain value 
is 2 dBi. 
One internal PIFA antenna for RX function only and the gain...

138APPENDIX B: TECHNICAL SPECIFICATIONS
Standard IEEE 802.11g, Direct Sequence Spread Spectrum (DSSS)
Transmission rate: 54 Mbps, automatic fallback to 48, 36, 24, 18, 12, or 
6Mbps
Maximum channels: 13
Range up to 304.8m (1000ft)
Sensitivity:  6, 12, 18, 24, 36, 48 Mbps: -85 dBm;
54 Mbps -66 dBm typical
Modulation: CCK, BPSK, QPSK, OFDM
Encryption: 40/64 bit WEP, 128 bit WEP, WPA/WPA2
Maximum clients: 128
O/P Power: 14dBm
Standard IEEE 802.11b, Direct Sequence Spread Spectrum (DSSS)
Transmission rate:...