Understanding The Three Dial-In Profile Types - 3Com Dual 56K User Manual

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HAPTER ONFIGURING THE
Understanding the
Three Dial-in Profile
Types
Single User Dial-in
D 56K LAN M
UAL ODEM FOR
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.
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.
192.168.1.2
192.168.1.3
192.168.1.4
192.168.1.5
Server-side LAN
D - S
IAL IN UPPORT
192.168.254.1
MODEM 1 MODEM 2 LAN Status
OfficeConnect Dual 56k LAN Modem
OfficeConnect
Dual 56K LAN Modem
LAN Modem issues
single IP address to
incoming client
192.168.254.1
Public telephone
network
Dial-in user with
analog modem
calls into LAN Modem