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Phone Adapter with Router
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Chapter 1: Introduction
What’s in this Guide?
•
Appendix A: Troubleshooting
This appendix describes some possible problems and solutions, as well as frequently asked questions,
regarding installation and use of the Phone Adapter.
•
Appendix B: Finding the MAC Address and IP Address for Your Ethernet Adapter
This appendix instructs you on how to find the MAC address or Ethernet address of your PC’s Ethernet
network adapter.
•
Appendix C: Windows Help
This appendix describes how you can use Windows Help for instructions about networking, such as
installing the TCP/IP protocol.
•
Appendix D: Glossary
This appendix gives a brief glossary of terms frequently used in networking.
•
Appendix E: Specifications
This appendix provides the technical specifications for the Phone Adapter.
•
Appendix F: Warranty Information
This appendix supplies the warranty information for the Phone Adapter.
•
Appendix G: Regulatory Information
This appendix supplies the regulatory information regarding the Phone Adapter.
•
Appendix H: Contact Information
This appendix provides contact information for a variety of Linksys resources, including Technical Support.
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Phone Adapter with Router
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Chapter 1: Introduction
What’s in this Guide?
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Page 13 / 96
Phone Adapter with Router
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Chapter 2: Networking Basics
An Introduction to Local Area Networks
Chapter 2: Networking Basics
An Introduction to Local Area Networks
Simply put, a router is a network device that connects two networks together.
The Phone Adapter connects your local area network (LAN), or the group of PCs in your home or office, to the
Internet. The Phone Adapter processes and regulates the data that travels between these two networks.
The Phone Adapter’s Network Address Translation (NAT) technology protects your network of PCs so users on the
Internet cannot “see” your PCs. This is how your LAN remains private. The Phone Adapter protects your network
by inspecting the first packet coming in through the Internet port before delivery to the final destination on one of
the Ethernet ports. The Phone Adapter inspects Internet port services like the web server, ftp server, or other
Internet applications, and, if allowed, it will forward the packet to the appropriate PC on the LAN side.
The Use of IP Addresses
IP stands for Internet Protocol. Every device in an IP-based network, including PCs, print servers, and routers,
requires an IP address to identify its location, or address, on the network. This applies to both the Internet and
LAN connections.
There are two ways of assigning IP addresses to your network devices.
A static IP address is a fixed IP address that you assign manually to a PC or other device on the network. Since a
static IP address remains valid until you disable it, static IP addressing ensures that the device assigned it will
always have that same IP address until you change it. Static IP addresses are commonly used with network
devices such as server PCs or print servers.
static ip address
: a fixed address
assigned to a computer or device that is
connected to a network.
nat
(network address translation): NAT
technology translates IP addresses of a
local area network to a different IP
address for the Internet.
ip
(internet protocol): a protocol used to
send data over a network.
ip address
: the address used to identify a
computer or device on a network.
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Phone Adapter with Router
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Chapter 2: Networking Basics
The Use of IP Addresses
If you use the Phone Adapter to share your cable or DSL Internet connection, contact your ISP to find out if they
have assigned a static IP address to your account. If so, you will need that static IP address when configuring the
Phone Adapter. You can get the information from your ISP.
A dynamic IP address is automatically assigned to a device on the network. These IP addresses are called
dynamic because they are only temporarily assigned to the PC or other device. After a certain time period, they
expire and may change. If a PC logs onto the network (or the Internet) and its dynamic IP address has expired,
the DHCP server will assign it a new dynamic IP address.
A DHCP server can either be a designated PC on the network or another network device, such as the Phone
Adapter. By default, the Phone Adapter’s Internet Connection Type is
DHCP
(obtain an IP address automatically).
The PC or network device obtaining an IP address is called the DHCP client. DHCP frees you from having to
assign IP addresses manually every time a new user is added to your network.
For DSL users, many ISPs may require you to log on with a user name and password to gain access to the
Internet. This is a dedicated, high-speed connection type called Point to Point Protocol over Ethernet (PPPoE).
PPPoE is similar to a dial-up connection, but PPPoE does not dial a phone number when establishing a
connection. It also will provide the Phone Adapter with a dynamic IP address to establish a connection to the
Internet.
By default, a DHCP server (on the LAN side) is enabled on the Phone Adapter. If you already have a DHCP server
running on your network, you MUST disable one of the two DHCP servers. If you run more than one DHCP server
on your network, you will experience network errors, such as conflicting IP addresses. To disable DHCP on the
Phone Adapter, see the Router - LAN Setup section in “Chapter 5: Using the Web-based Utility.”
dynamic ip address
: a temporary IP
address assigned by a DHCP server.
dhcp
(dynamic host configuration
protocol): a protocol that lets one device
on a local network, known as a DHCP
server, assign temporary IP addresses to
the other network devices, typically
computers.
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Chapter 3: Getting to Know the Phone Adapter
The Back Panel
Chapter 3: Getting to Know the Phone Adapter
The Back Panel
The Phone Adapter’s ports are located on the back panel.
PHONE 1/2
Use this
port to connect an analog phone (or fax machine) with an RJ-11 telephone cable.
ETHERNET
The
ETHERNET
port connects to a network device, such as a PC or a switch, with an
Ethernet network cable.
INTERNET
The
INTERNET
port connects to your cable or DSL modem.
Power
The
Power
port is where you will connect the power adapter.
Figure 3-1: Back Panel
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