Reference Guide for the Model RP114 Web Safe Router
B-10 Network and Routing Basics

IP Configuration by DHCP

When an IP-basedlocal area network is installed, each PC must be configured with an IP address.
If thePCs need to access the Internet, they should also be configured with a gateway addressand
oneor more DNS server addresses. As an alternative to manual configuration, thereis a method by
which each PC on the network can automaticallyobtain this configuration information. A device
on the network may act as a DynamicHost Configuration Protocol (DHCP) server. The DHCP
serverstores a list or pool of IP addresses, along with other information (such as gateway and DNS
addresses)that it may assign to the other devices on the network. The Model RP114router has the
capacityto act as a DHCP server.
The Model RP114router also functions as a DHCP client when connecting to the ISP. The router
canautomatically obtain an IP address, subnet mask, DNS server addresses, and a gateway address
if the ISP provides thisinformation by DHCP.
Ethernet Cabling
AlthoughEthernet networks originally used thick or thin coaxial cable, mostinstallations currently
use unshieldedtwisted pair (UTP) cabling. The UTP cable contains eight conductors, arranged in
four twistedpairs, and terminated with an RJ45 type connector. A normal "straight-through"UTP
Ethernetcable follows the EIA568B standard wiring and pinout as described in Table B -3.
TableB-3. UTP Ethernet cable wiring, straight-through
Pin Wirecolor Signal
1 Orange/White Transmit(Tx) +
2 Orange Transmit(Tx) -
3 Green/White Receive (Rx) +
4Blue
5 Blue/White
6 Green Receive (Rx) -
7 Brown/White
8Brown