Installation Guide
Connecting the Modem
12
Terayon TJ 700x Series DOCSIS Cable Modem Installation Guide
Connecting Two PCs to the TJ 700x Series Modem
The Terayon TJ 700x Series modem provides a feature called Ethernet-USB Bridging.
This feature allows you to connect two PCs to the modem without having to use an
additional hub. Each PC has it’s own high speed Internet connection and the two PCs
can communicate with each other without going through the Internet.
Technical Stuff
One PC connects to the Terayon TJ 700x Series modem via an Ethernet connection (see
Figure 9 on page 13). The second PC connects to the modem using a USB connection
(see Figure 9 on page 13).
An additional requirement for connecting two PCs to the Terayon TJ 700x Series modem
is that your cable operator must provision the modem for two IP addresses. Every com-
puter on the Internet (that includes your two PCs) is assigned a four-part numeric IP
address, similar to 127.85.46.9. This IP address identifies the computer to other comput-
ers on the net—its sort of like a phone number.
Rather than permanently assigning an IP address to every PC on the cable network,
your Internet Service Provider (ISP) or cable operator has a pool of free IP addresses.
Every time a PC on the cable network logs onto the Internet, it is assigned a free IP
address from the pool. When the PC is finished with its Internet application, the IP
address goes back into the pool—its called Dynamic addressing.
Typically a cable modem like the Terayon TJ 700x Series modem is provisioned to han-
dle just one IP address for one computer. If you connect two PCs to the TJ 700x Series
modem, the modem must be provisioned to handle two IP addresses. Your cable operator
should have set up your addressing already, so you generally don’t have to worry.
IMPORTANT: If you are going to connect two PCs to your new Terayon TJ
700x Series modem, follow the instructions given for both an Ethernet
connection and a USB connection. See “Making Ethernet Connections” on
page 8 for instructions on how to install an Ethernet cable. See “Making USB
Connections” on page 10 for instructions on how to install a USB cable.
Just as a reminder, you must install USB drivers on your computer before you
install a USB cable.
