96
C
HAPTER
8: C
ONFIGURING
THE
D
UAL
56K LAN M
ODEM
FOR
D
IAL
-
IN
S
UPPORT
Understanding the
Three Dial-in Profile
Types
When you create a
Dial-in User Profile
as part of the server-side LAN Modem
configuration process, you must select from among three
Dial-in Profile Types
to
identify the type of client device that will dial in to the server-side LAN Modem.
This section explains the three dial-in profile types and tells you when to select one
over the other.
Single User Dial-in
The
Single User Dial-in
profile applies to any client device that uses a single IP
address (issued by the server-side LAN Modem) to communicate with the
server-side LAN Modem across the WAN. The client device which dials into a
remote LAN Modem for Single User Dial-in is often a single analog modem.
Single User Dial-in may also use an analog router (such as a second LAN Modem)
that uses Network Address Translation (NAT) to share one IP address among
multiple users, similar to a typical ISP connection. Note that unlike the LAN
Modem Site-to-Site profile (described later), the Single User scenario does not
provide for bidirectional LAN-to-LAN connectivity. While authorized workstations
attached to the client LAN Modem can share the connection to the remote LAN
Modem, workstations connected to the server LAN Modem cannot access
client-side resources.
Choose
Single User Dial-in
when your dial-in user will access a server LAN
Modem via a single analog modem, or via a LAN Modem that will share one IP
address for all attached workstations. Note that in this scenario, workstations on
the server-side cannot access client-side resources.
For a full explanation of Network Address Translation, refer to Appendix A.
Figures 53 and 54 illustrate the two possible
Single User Dial-in
profile type
scenarios.
Public telephone
network
Server-side LAN
Dial-in user with
analog modem
calls into LAN Modem
OfficeConnect
Dual 56K LAN Modem
192.168.254.1
192.168.254.1
LAN Modem issues
single IP address to
incoming client
Alert
Power
Message
RD
AA
CD
SD
OH
RD
AA
CD
SD
OH
OfficeConnect Dual 56k LAN Modem
1
TX
COLL
2
3
4
LAN Status
MODEM 2
MODEM 1
192.168.1.2
192.168.1.3
192.168.1.4
192.168.1.5
Summary of Contents for 3C888 - OfficeConnect Dual 56K LAN Modem Router
Page 10: ...GLOSSARY 3COM CORPORATION LIMITED LIFETIME WARRANTY REGULATORY AND APROVAL INFORMATION ...
Page 30: ...30 CHAPTER 2 DUAL 56K LAN MODEM FUNCTIONALITY DESCRIPTION ...
Page 46: ...46 CHAPTER 4 INSTALLING THE DUAL 56K LAN MODEM ...
Page 58: ...58 CHAPTER 5 CONFIGURING THE DUAL 56K LAN MODEM FOR INTERNET ACCESS ...
Page 124: ...124 CHAPTER 9 PLACING RECEIVING AND DISCONNECTING CALLS ...
Page 136: ...136 CHAPTER 10 TROUBLESHOOTING AND MAINTENANCE ...
Page 146: ...146 APPENDIX A NETWORKING PRIMER ...
Page 154: ...154 APPENDIX D FACTORY DEFAULTS ...
Page 156: ...156 APPENDIX E SPECIFICATIONS ...
Page 166: ......