ESI E-Class User manual

Remote IP Feature Phone
Installation Manual
0450-0450
Rev. A

About ESI
ESI (Estech Systems, Inc.) is a privately held corporation based in Plano, Texas. Founded in 1987, ESI
designs and builds innovative telecommunications products for businesses like yours. Because of their
powerful combination of value and features, ESI products are consistently recognized by industry
publications and leaders.
Copyright © 2003 ESI (Estech Systems, Inc.).
IVX is a registered trademark of Estech Systems, Inc. Microsoft, MS and Windows are registered trademarks of Microsoft
Corporation. Intel is a registered trademark of Intel Corporation. Ethernet is a registered trademark of the Xerox Coporation.
Linksys is a registered trademark of Linksys Group, Inc. DIVA is a trademark of Eicon Networks Corporation. Information contained
herein is subject to change without notice. ESI products are protected by U.S. Patents No. 6,067,349 and 6,252,944, and others
pending. ESI is an ISO 9001-certified company. Visit ESI on the Web at www.esi-estech.com.

Table of contents
General description..................................................................................................................................................A.1
Esi-Tools........................................................................................................................................................................................................A.1
Programming information.......................................................................................................................................B.1
Main office parameters ................................................................................................................................................................................B.1
Remote site parameters ..............................................................................................................................................................................B.2
Remote Phone MAC address.....................................................................................................................................................................B.2
Programming the IP PBX and Remote IP Feature Phone....................................................................................C.1
Programming the IP PBX for remote access.............................................................................................................................................C.1
Programming the Remote IP Feature Phone............................................................................................................................................C.1
Configuring the remote modem router..................................................................................................................D.1
xDSL modem with a static IP address .......................................................................................................................................................D.2
Cable modem with a static IP address.......................................................................................................................................................D.3
Dedicated ISDN with a static IP address ...................................................................................................................................................D.4
Dial-up ISDN.................................................................................................................................................................................................D.5
Configuring a NAT router for DHCP ...........................................................................................................................................................D.7
Configuring a NAT router for DHCP ...........................................................................................................................................................D.7
Configuring a NAT router for PPPoE..........................................................................................................................................................D.9
Connecting the Remote IP Feature Phone............................................................................................................E.1
Network guidelines .................................................................................................................................................. F.1
LAN................................................................................................................................................................................................................ F.1
WAN .............................................................................................................................................................................................................. F.2
Troubleshooting ...................................................................................................................................................... G.1
Troubleshooting tools.................................................................................................................................................................................. G.1
Troubleshooting scenarios ......................................................................................................................................................................... G.1
Appendix I: Using PING to verify the remote site/ main office connection......................................................H.1
Appendix II: Using TRACERT .................................................................................................................................. I.1
Appendix III: Installing the TCP/IP protocol in Windows 95/98 .......................................................................... J.1
Appendix IV: IP addressing information worksheet ...........................................................................................K.1
Appendix V: Address recovery at the remote site............................................................................................... L.1
Appendix VI: Discovering the remote-access IP address for the remote IP PBX ........................................... M.1
Index

(This page included for pagination purposes only.)

Remote IP Feature Phone Installation Manual General description
A.1
General description
This manual provides step-by-step instructions and guidelines for your use in installing the Remote IP
Feature Phone. The Remote IP Feature Phone is compatible with a wide range of broadband access
devices and Internet service providers (ISPs). Providing instructions for all types of broadband access
equipment would not be possible in a reasonably sized document; instead, this manual deals with
several common devices. With a good understanding of the installation procedures within this manual,
the Installer should be able to determine how to install the Remote IP Feature Phone with other access
devices. Additional support is available from ESI Sales Engineering.
The E-Class Remote IP Feature Phone is designed specifically to work with the following ESI IP PBX
systems: IP 200e, IP 40e, IVX®128e and IVX 72e. Installation of a Remote Network Card (RNC) in the
IP 200e and IP 40e is required to support operation of the Remote IP Feature Phone. Installation of a
Local Network Card (LNC) and a RNC is required in the IVX 128e and IVX 72e.
Note: For proper installation and configuration of an RNC, follow the procedures in the appropriate Installation
Manual for the system involved, the Remote Network Card Installation Guide and — if the system is
IVX 128e or IVX 72e — the Local Network Card Installation Guide. You can find all E-Class technical
documents on the Technical Resource Guide CD-ROM.
Esi-Tools
Important: Prior to receiving the Remote IP Feature Phone you should have completed, and submitted to
ESI Sales Engineering, a Network Qualification Checklist for Remote IP Feature Phone
Installations. If the checklist has not been completed and/or approved by ESI Sales
Engineering, DON’T proceed with the installation. The purpose of the checklist is to ensure
that the installation will be successful and trouble-free. Contact ESI Sales Engineering with
questions on the suitability of a potential installation site.
The Esi-Tools PC-based applications suite includes several easy-to-use utilities to assist the installer
with setting up and troubleshooting Remote IP Feature Phone installations. Among these:
• Esi-Networx — A network performance measurement and analysis tool; can be used in place of the
standard Windows®/MS®-DOS PING and TRACERT commands.
• Esi-Address — Used to program and upgrade local and Remote IP Feature Phones.
• Esi-Check — Provides continuous monitoring of IP link quality for the Remote IP Feature Phone.
For more information, refer to the Esi-Tools Product Overview and User’s Guide or contact your ESI
sales representative to learn how you may obtain Esi-Tools.
If you don’t have Esi-Tools, you may find this manual’s appendices especially useful:
• Appendix I — Using the PING command to verify the remote site/home office connection
• Appendix II — Using the TRACERT command
• Appendix III — Installing the TCP/IP protocol
• Appendix IV — IP address worksheet
• Appendix V — Address discovery at the remote site
• Appendix VI — Discovering the IP PBX’s remote-access IP address

General description Remote IP Feature Phone Installation Manual
A.2
(This page included for pagination purposes only.)

Remote IP Feature Phone Installation Manual Programming information
B.1
Programming information
Before programming the Remote Phone and the IP PBX, addressing and access information should be
defined and collected.
Important: We have provided the worksheet in Appendix IV to help you collect the information described on
these pages. Fill out this worksheet and use it during the programming operation.
The private, or local, IP addresses and UDP port numbers should be agreed upon with the site network
administrator or the person designing the network. The ISP provides the public IP addresses. Contact
the ISP if the network administrator cannot provide this information.
In most cases, there won’t be a network administrator for the remote site; this will be typical for the
home office installation. Appendix V, “Address discovery at the remote site,” provides step-by-step
procedures for determining existing addressing information, such as the gateway address. This
appendix also provides guidelines for selecting a private IP address and a UDP port for the Remote IP
Feature Phone.
There may also be cases where the main office network administrator is not available. Appendix VI provides
a procedure to “discover” the needed main office addressing information. This will be useful for main office
installations where the IP PBX has already been configured for Remote Phone or Esi-Link operation.
Main office parameters
Note: If the main office IP PBX has been previously configured for a remote phone or Esi-Link
multi-site access, these programming parameters will already be programmed into the IP PBX. The same
addressing parameters should be used unless an alternate gateway will be used at the main office for
this Remote Phone. (Refer to Figure 1, page B.2, for examples.)
• PBX private IP address — The address IP PBX uses on the internal network at the main office.
[Item 1 in Figure 1, page B.2.]
• PBX default gateway IP — The internal network address of the default gateway. [Item 2 in
Figure 1, page B.2.]
• Remote-access IP address — The public or private IP address used for remote access to the IP
PBX. [Item 3 in Figure 1, page B.2.] This is typically the public IP address of the main office gateway.
This is programmed in Function 821 and Function 31. If the main office has a single gateway, the
remote-access IP address will be the same in both programming steps; this will be true in the vast
majority of installations. However, in some installations, there may be two or more gateways at the
main office.
If Function 821 has been previously programmed for one gateway, and the remote phone
being programmed will use the other gateway, don’t change the remote-access IP address in
Function 821; instead, enter the alternate remote-access IP address in Function 31.
• Base UDP port number — The base UDP port number used by the IP PBX for access through the
main office gateway.
Important: If the Remote IP Feature Phone will connect via the Internet, the remote-access IP address must
be a public address (assigned by the ISP).

Programming information Remote IP Feature Phone Installation Manual
B.2
Remote site parameters
• IP address — The address the Remote Phone will use. This can be either a public or private
address. [Item 4 in Figure 1, below.] The Remote Phone can only use a static address. If a static
public address is not available a NAT router must be used. In that case, the Remote Phone IP
address will be a private address on the remote site network. (Note that the Remote Phone IP
address cannot be the same as the PC address [Item 5 in Figure 1, below].)
• Remote Phone gateway IP — If the Remote Phone uses a private IP address, this will be the
internal network address of the remote site gateway. [Item 6 in Figure 1, below.] If the Remote Phone
use a public IP address, this will be the ISP gateway’s IP address. This is commonly referred to as
the default gateway.
• UDP Port number — The port number that the remote phone will use for access through the
gateway at the Remote site.
Remote Phone MAC address
The Remote Phone MAC address is unique to each Remote Phone, and is preprogrammed. You’ll need
this address for programming the IP PBX.
To determine the MAC address for a Remote Phone, power up the phone and wait; soon, the Remote
Phone’s display will show the MAC address (for approximately 30 seconds).
Figure 1

Remote IP Feature Phone Installation Manual Programming the IP PBX and Remote IP Feature Phone
C.1
Programming the IP PBX
and Remote IP Feature Phone
The section outlines the process for configuring the IP PBX and the Remote IP Feature phone for
remote operation. This provides a quick overview. For complete instructions, please refer to Function 8
in the appropriate E-Class Installation Manual (IP E-Class or IVX E-Class).
Programming the IP PBX for remote access
If the IP PBX has previously been programmed for remote operation, these steps don’t have to
be repeated.
Important: DO NOT connect the Remote IP Feature Phone during these steps.
1. Use Function 821 to program the IP PBX address information. This includes:
• PBX private IP address
• PBX default gateway IP
• Remote-access IP address
• Base UDP port number
2. If this is the first remote connection made to this IP PBX, verify that the main office gateway is
properly configured for the remote-access IP address and UDP port number.
Programming the Remote IP Feature Phone
Important: Portions of this programming must be done prior to connecting the Remote IP Feature Phone to
the main office local network. Power up the phone but do not connect the Remote IP Phone until
instructed. Perform the programming from a local IP phone on the network.
1. Use Function 31 to program the Remote IP Feature Phone parameters into the IP PBX. These
parameters include:
• Extension number
• Type = Remote Phone
• IP address that the Remote IP Feature Phone will use at the remote site
• MAC address (0030 4Dxx xxxx as read from the Remote IP Feature Phone display)
• Gateway address at the remote site
• UDP port number that the Remote IP Feature Phone will use at the remote site
• Remote-access IP address for the IP PBX
Note: Here, you will be prompted to save the settings you have programmed so far, here.
Press #to save the information and continue.
• User name
• CO line groups
• Call forwarding extension for the day mode
• Call forwarding extension for the night mode
The information is now stored in the IP PBX.

Programming the IP PBX and Remote IP Feature Phone Remote IP Feature Phone Installation Manual
C.2
2. Now, connect the Remote IP Feature Phone to the local network. The phone should connect to the
network and become operational.
3. The Function 31 parameters now need to be downloaded to the phone. Repeating the Function 31
programming steps does this. Enter the extension number and press #. You don’t have to re-enter
the rest of the parameters; just push #to confirm each parameter. Then, when you exit Function 31,
the parameters will be sent to the Remote IP Feature Phone.
The phone is now ready for installation at the remote site.
The process described here requires that the programming of the IP PBX and Remote IP Feature Phone
be performed at the main office before installing the phone at the remote site. Esi-Tools includes two
software tools, Esi-Access and Esi-Address, that can be used to minimize the amount of travel required to
install a Remote IP Feature Phone. This will be very useful in cases wherein the remote site is far from the
main office. Use Esi-Access to connect remotely to the main office IP PBX for programming in Functions 31
and 821; use Esi-Address to download the addressing information to the Remote IP Feature Phone.
Refer to each software tool’s respective User’s Guide for instructions.

Remote IP Feature Phone Installation Manual Configuring the remote modem/router
D.1
Configuring the
remote modem router
This section provides step-by-step procedures for configuring different types of modems that are
commonly used at remote sites. These include the following:
• xDSL modem with a static IP address
• Cable modem with a static IP address
• Dedicated ISDN
• Dial Up ISDN (DIVA LAN ISDN modem)
These procedures assume that the remote access device may or may not be configured for normal data
access from the remote site computer(s). For this purpose, the first part of each procedure includes
steps for configuring the remote site computer and modem device for basic operation. Steps are then
provided for adding the Remote Phone addressing information. If basic data access has already been
established it will not be necessary to repeat the first part of the procedure, proceed to the section for
adding the Remote Phone Addressing.
In some areas, cable modem and xDSL access are offered without static IP addressing. This can be
done with either dynamic addressing (DHCP) or Point-to-Point Protocol over Ethernet (PPPoE). In both
cases a Network Address Translation, or NAT, router will be required. The NAT router will be used
between the modem and the Remote Phone. The following procedures are included and must be
performed in addition to configuring the modem:
• Configuring a NAT router to support DHCP
• Configuring a NAT router to support PPPoE

Configuring the remote modem/router Remote IP Feature Phone Installation Manual
D.2
xDSL modem with a static IP address
Configuring the PC
1. Configure the PC to use a static IP address:
• Click on the Start Menu, choose Settings, then choose Control Panel.
• Double click the Network icon. The Network dialog box appears.
• Choose the TCP/IP protocol. (If you do not see TCP/IP, please refer to Appendix III for
instructions for installing TCP/IP.) You may have multiple instances of the protocol bound to
different adapters. If so double-click on the TCP/IP that appears to the network interface card
(NIC) installed in your computer.
• Click on the IP address tab, and ensure that the radio button next to Specify an IP address is
filled in.
o Enter the IP address assigned to you by the ISP.
o Enter the subnet mask assigned to you by the ISP.
• Click on the DNS tab.
o Ensure the bullet next to Enable DNS is selected.
o Enter the Host and Domain. (The host name is the name of the computer, and the domain
is supplied by the ISP.)
o Enter the IP addresses of the DNS servers assigned to you by the ISP. (If unsure of these
addresses, contact the ISP.)
• Click on the Gateway tab.
o Enter the gateway IP address assigned by the ISP under New Gateway, then click the
Add button.
• Click on the OK button.
• The PC will display a message, “You must restart your computer for the new settings to take
effect.” Click the Yes button.
2. When the PC boots back up, test the Internet connection using the DOS PING command
(refer to Appendix I for additional instructions).
If the PING test fails, check the TCP/IP setting again to make sure a typo did not occur. If the
settings look right, contact the ISP’s Technical Support Center and verify the IP address information.
Also, check with the ISP to make sure that the circuit is operating correctly.
Once the PING test is successful, you are ready to configure the ESI IP Remote Feature Phone for use
with the xDSL modem.
Adding the Remote Phone addressing
If a static address is assigned to the remote phone, no further programming of the xDSL modem is
required. Proceed to “Connecting the Remote Phone” (page E.1).

Remote IP Feature Phone Installation Manual Configuring the remote modem/router
D.3
Cable modem with a static IP address
Configuring the PC
1. Configure the PC to use a static IP address:
• Click on the Start Menu, choose Settings, then choose Control Panel.
• Double click the Network icon. The Network dialog box appears.
• Choose the TCP/IP protocol. (If you do not see TCP/IP, please refer to Appendix III for
instructions for installing TCP/IP.) You may have multiple instances of the protocol bound to
different adapters. If so double-click on the TCP/IP that appears to the network interface card
(NIC) installed in your computer.
• Click on the IP address tab, and ensure that the radio bullet next to Specify an IP address is
filled in.
o Enter the IP address assigned to you by the ISP.
o Enter the subnet mask assigned to you by the ISP.
• Click on the DNS tab.
o Ensure the bullet next to Enable DNS is selected.
o Enter the Host and Domain. (The host name is the name of the computer, and the domain
is supplied by the ISP.)
o Enter the IP addresses of the DNS servers assigned to you by the ISP. (If unsure of these
addresses, contact the ISP.)
• Click on the Gateway tab.
o Enter the gateway IP address assigned by the ISP under New Gateway, then click the
Add button.
• Click on the OK button.
• The PC will display a message, “You must restart your computer for the new settings to take
effect.” Click the Yes button.
2. When the PC boots back up, test the Internet connection to the main office gateway using the DOS
PING command (refer to Appendix I for additional instructions).
If the PING test fails, check the TCP/IP setting again to make sure a typo did not occur. If the
settings look right, contact the ISP’s Technical Support Center and verify the IP address information.
Also, check with the ISP to make sure that the circuit is operating correctly.
Once the PING test is successful, you are ready to configure the ESI IP Remote Feature Phone for use
with the cable modem.
Adding the Remote Phone addressing
If a static address is assigned to the remote phone, no further programming of the cable modem is
required. Proceed to “Connecting the Remote Phone” (page E.1).

Configuring the remote modem/router Remote IP Feature Phone Installation Manual
D.4
Dedicated ISDN with a static IP address
Configuring the PC
1. Configure the PC for a static IP address:
• Click on the Start Menu, choose Settings, then choose Control Panel.
• Double click the Network icon. The Network dialog box appears.
• Choose the TCP/IP protocol. (If you do not see TCP/IP, please refer to Appendix III for
instructions for installing TCP/IP.) You may have multiple instances of the protocol bound to
different adapters. If so double-click on the TCP/IP that appears to the network interface card
(NIC) installed in your computer.
• Click on the IP address tab, and ensure that the radio bullet next to Specify an IP address is
filled in.
• Enter the IP address assigned to you by the ISP.
• Enter the Subnet Mask Assigned to you by the ISP.
• Click on the DNS tab.
• Ensure the bullet next to Enable DNS is selected.
• Enter the Host and Domain. (The Host name is the name of the computer, and the Domain is
supplied by the ISP.)
• Enter the IP addresses of the DNS Servers assigned to you by the ISP. (If unsure of these
addresses, contact the ISP.)
• Click on the Gateway tab.
o Enter the gateway IP address assigned by the ISP under New Gateway, then click the
Add button.
• Click on the OK button.
• The PC will display a message that read “You must restart your computer for the new settings to
take effect.” Click the Yes button.
2. When the PC boots back up, test the Internet connection to the main office gateway using the DOS
PING command (refer to Appendix I for additional instructions).
If the PING test fails, check the TCP/IP setting again to make sure a typo did not occur. If the
settings look right, contact the ISP’s Technical Support Center and verify the IP address information.
Also, check with the ISP to make sure that the circuit is operating correctly.
Once the PING test is successful, you are ready to configure the ESI IP Remote Feature Phone for use
with the ISDN circuit.
Adding the Remote Phone addressing
If a static address is assigned to the Remote Phone, no further programming of the ISDN modem is
required. Proceed to the section “Connecting the Remote Phone” (see page E.1).

Remote IP Feature Phone Installation Manual Configuring the remote modem/router
D.5
Dial-up ISDN
This procedure is specifically for the DIVA™LAN ISDN Modem. Other ISDN dial-up modems will be
similar. Refer to the Installation Manual for the specific modem being installed.
Configuring the modem
1. Retrieve the DIVA LAN ISDN Modem Quick Install Guide that came with the modem.
2. Turn to Step 4 of the Quick Install Guide. Item 2 under Step 4 will quickly explain how the user’s PC
needs to be set up. The PC must be configured to use DHCP (or as stated in the Windows network
properties, “obtain an IP address automatically”):
• Click on Start, choose Settings, then choose Control Panel.
• Double click the Network icon. The Network dialog box appears.
• Choose the TCP/IP protocol. There may be multiple instances of the protocol bound to different
adapters. Click the TCP/IP that appears for the network interface card (NIC) installed in the
user’s PC.
• Click on the IP address tab, and ensure that the radio button next to Obtain IP address
automatically is filled in.
• Click on OK; reboot the PC if needed.
3. Complete the remainder of Step 4 of the Quick Install Guide.
4. Follow Step 5 instructions until item number 9b. Enter the phone numbers assigned to the ISDN lines.
5. Follow item number 10 instructions.
• In the Primary and Secondary telephone numbers, enter the Dial Up access number supplied by
the ISP.
• The bottom two fields require the DNS addresses. The ISP also supplies these addresses. Then
click Next.
6. Set up the Cost Control settings if needed, then click on Next.
7. You will see the Review and Save window. Please verify all of the information on this screen. If an
item needs changing, click on Back. If the modem isn’t connected to the ISDN line, click on Save; if
the modem is connected to the ISDN line, then click on Save + Test. This will save the configuration
you just made, and test the settings.
8. If the modem is connected to the ISDN lines, and the test passes, please continue on to the next
step. If the modem did not pass the test, please verify that all the information was entered correctly.
If the modem is set up properly and still cannot pass the test, contact the ISP’s Technical Support
Center.
9. After the modem passes the test, verify the Internet connection to the main office gateway using the
DOS PING command. Refer to Appendix I for additional instructions. If the PING test fails, correct
the problem before proceeding.

Configuring the remote modem/router Remote IP Feature Phone Installation Manual
D.6
Adding the Remote Phone addressing
The DIVA LAN ISDN Modem has built-in network address translation (NAT) to allow multiple hosts to
use the ISDN connection to the Internet and to provide limited security for those hosts. Please follow the
following steps to add the Remote Phone address and UDP Port to the NAT mapping.
1. On the user’s PC (assuming it’s properly configured to use the modem), open a Web browser and,
in the address field, enter the IP address of the modem. By default, that address is 192.168.1.1.
2. The Web browser will load the configuration screen and should ask for your password. Enter the
system password if required.
3. You should now be at the main Configuration menu. To allow the traffic bound for the phone
through the modem you will need to create a static NAT mapping (in addition to the following, you
can find instructions for this in the DIVA LAN ISDN Modem User’s Guide.)
• Click on IP.
• On the IP menu, click NAT Static Mappings.
• On Map 1, under the Protocol choose UDP.
• Under the server port, enter the UDP port the Remote IP Feature Phone will be using.
For the server IP address for Map 1, enter the IP address of the phone.
• Now click on Save, then click on Reset.
4. When the modem comes back on-line, proceed to “Connecting the Remote Phone” (page E.1).

Remote IP Feature Phone Installation Manual Configuring the remote modem/router
D.7
Configuring a NAT router for DHCP
The following instructions were written for the Linksys Etherfast Cable/DSL Router model Numbers
BEFSRU31, BEFSR41 v.2, and BEFSR11. The steps will be similar for other NAT routers. Refer to the
router’s User’s Guide for the specific instructions.
1. Retrieve the Linksys Etherfast Cable/DSL Router User’s Guide that came with the router.
2. The user’s PC must be configured to use DHCP (or, as stated in the Windows network properties,
“Obtain an IP address automatically”):
• Click on the Start Menu, choose Settings, then choose Control Panel.
• Double click the Network icon. The Network Dialog Box appears.
• Choose the TCP/IP protocol. (If you do not see TCP/IP, please see page J.1 of these
instructions.) Multiple instances of the TCP/IP protocol bound to different adapters may appear. If
so double click the TCP/IP that appears to the network interface card (NIC) installed in the PC.
• Click on the IP address tab, and ensure that the bullet next to “Obtain IP address
Automatically” is filled in.
• Click OK, and reboot the PC if needed.
3. Connect the router per the instructions in the User’s Guide.
4. Once the router is connected to the modem and the PC is connected to the router, open the Web
browser. In the address field of the browser, enter the IP address of the modem. By default, that
address is 192.168.1.1. (For more in-depth instructions for configuring the router, consult the
Linksys Etherfast Cable/DSL Router User’s Guide.)
5. If the PC is configured properly, the Login Screen will appear. Leave the User name field empty;
type the word admin into the password field and press the Enter key.
6. Configure the router based on how the network will be configured.
• Host Name and Domain Name — These will only need to be assigned if the ISP requires them.
The ESI Remote IP Feature phone does not require them.
• LAN IP address — Leave as default.
• WAN IP address — Enter what the ISP has assigned.
• If the ISP has assigned static IP addresses to the site, enter them here. Enter at least the IP
address, the subnet mask, the default gateway, and the DNS IP addresses. Again, your ISP will
assign these to the connection. If it did not give these addresses to you, contact the ISP.
• If the ISP has assigned the connection as DHCP, click the radio button next to Obtain an IP
address Automatically.
7. Click the Apply button.
8. Click the DHCP Tab, and ensure that the Enable radio button is selected. If the network already has
a DHCP server running, click the Disable radio button.
9. Click the Apply button.
10. Restart the Router by powering if off, then on again, and reboot the PC.
11. After the router and the PC have rebooted verify the Internet connection by performing the PING
test as described in Appendix I.

Configuring the remote modem/router Remote IP Feature Phone Installation Manual
D.8
Adding the Remote Phone addressing
The Linksys Etherfast Cable/DSL router utilizes network address translation (NAT) to allow multiple
hosts to use the modem connection to the Internet and to provide limited security for those hosts.
Please follow the following steps to configure the router. (Instructions for connecting to the configuration
screen can also be found in the Linksys Etherfast Cable/DSL Router User’s Guide. Instructions for
configuring the Linksys router for specific ISPs can be obtained from the Linksys Web site,
www.linksys.com.)
1. On the user’s PC (assuming it’s properly configured to use the modem), open a Web browser and,
in the address field, enter the IP address of the modem. By default, that address is 192.168.1.1.
2. The Web browser will load the configuration screen and should ask for your password. Enter the
system password if required.
3. You should now be at the Setup menu. To allow the traffic bound for the phone through the router,
IP forwarding will need to be configured. (Instructions for setting up IP forwarding can also be found
in the Linksys Etherfast Cable/DSL Router User’s Guide.)
• From the Setup screen, click on the Advanced tab; then, click on the Forwarding tab.
• On the first mapping, which is the first item in the list, enter the UDP port the Remote IP Feature
Phone will be using in the Service Port field.
• Under the Protocol column, choose UDP.
• Under the IP address column, enter the IP address of the phone.
• Click on Apply, then click on Continue. Then restart the router by powering it off, then on again.
When the NAT router comes back online, proceed with installing the Remote IP Feature Phone (see
page E.1).

Remote IP Feature Phone Installation Manual Configuring the remote modem/router
D.9
Configuring a NAT router for PPPoE
The following instructions are for the Linksys Etherfast Cable/DSL router model numbers BEFSRU31,
BEFSR41 v.2, and BEFSR11. The steps will be similar for other NAT routers. Refer to the router User’s
Guide for the specific instructions. Instructions for configuring the Linksys router for specific ISPs can be
obtained from the Linksys Web site, www.linksys.com.
1. Retrieve the Linksys Etherfast Cable/DSL Router User’s Guide that came with the router.
2. The PC must be configured to use DHCP or, as stated in the Windows Network properties, “Obtain
an IP address automatically.” If you are not familiar with this setting:
• Click on the Start Menu, choose Settings, then choose Control Panel.
• Double click the Network icon. The Network dialog box appears.
• Choose the TCP/IP protocol. (If you do not see it, see “Appendix III: Installing the TCP/IP
Protocol,” page J.1.) You may have multiple instances of the protocol bound to different adapters.
If so, double-click on the TCP/IP that appears for the network interface card (NIC) installed in
your computer.
• Click on the IP address tab, and ensure that the bullet next to Obtain IP address Automatically
is filled in.
• Click OK, and reboot your computer if needed.
3. Connect your router per the instructions on Page 18 of the User’s Guide.
4. Once the router is connected to the modem, and the PC is connected to the router, open the Web
browser and in the address field enter the IP address of the modem. By default, that address is
192.168.1.1. (For more in depth instruction for configuring the router, see page 33 of the Linksys
Etherfast Cable/DSL Router User’s Guide.)
5. If the PC is configured properly, the log-in screen will appear. Leave the User name field empty and
type admin into the password field and press Enter.
6. Configure the router based on how the network will be configured.
• Host Name and Domain Name — These will only need to be assigned if your ISP requires
them. The ESI Remote IP Feature phone does not require them.
• LAN IP address — Leave as default.
7. Enable the router to perform the PPPoE client function.
• From the setup screen, look toward the bottom of the screen. You will see the PPPoE option.
• Click the Enable button.
• Fill in the Username and Password. The ISP should have assigned these.
• Check the box next to the Keep Alive option. This option will allow the connection to remain
open indefinitely.
8. Restart the router by powering it off, then on again, and reboot the PC.
9. Once the router and the PC come back online, test the Internet connection to the main office
gateway using the DOS PING command (refer to Appendix I for additional instructions). If the PING
test fails, correct the problem before proceeding.
10. You are now ready to configure the router for use with the ESI IP Remote Feature Phone.

Configuring the remote modem/router Remote IP Feature Phone Installation Manual
D.10
Adding the Remote Phone addressing
The Linksys Etherfast Cable/DSL router utilizes network address translation (NAT) to allow multiple
hosts to use the modem connection to the Internet and to provide limited security for those hosts. Follow
the following steps to configure the router. (Instructions for connecting to the configuration screen can
also be found in the Linksys Etherfast Cable/DSL Router User’s Guide.)
1. On the user’s PC open a Web browser and, in the address field, enter the IP address of the
modem. By default, that address is 192.168.1.1.
2. The Web browser will load the configuration screen and should ask for your password. Enter the
system password if required.
3. You should now be at the Setup menu. To allow the traffic bound for the phone through the router,
IP Forwarding will need to be configured. (Instructions for setting up IP Forwarding can also be
found in the Linksys Etherfast Cable/DSL Router User’s Guide.)
• From the Setup screen, click on the Advanced tab; then, click on the Forwarding tab.
• On the first mapping, which is the first item in the list, enter the UDP port the Remote IP Feature
Phone will be using in the Service Port field.
• Under the Protocol column, choose UDP.
• Under the IP address column, enter the IP address of the phone.
• Click on Apply, then click on Continue. Then restart the router by powering it off, then on again.
When the NAT router comes back online, proceed with installing the Remote IP Feature Phone.