3Com 3C888 - OfficeConnect Dual 56K LAN Modem Router, Руководство пользователя

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14 C
HAPTER
1: I
NTRODUCTION
Applications
The primary applications for the Dual 56K LAN Modem are:
■
Local networking with shared, dial-out access to the Internet
■
Local networking with shared, dial-out access to a private network, such as a
remote corporate office LAN (this can include indirect Internet access through
the private network’s Internet connection)
■
Local networking with shared, simultaneous dial-out access to the Internet and
a private network
■
Combined dial-in and dial-out access for several possible networking scenarios
(refer to Chapter 8 for specific dial-in applications).
The following diagrams illustrate the primary Dual 56K LAN Modem applications:
Local Networking with
Shared Internet Access
Users can share access to the Internet while they continue to network locally, as
shown in Figure 1.
Figure 1 Local Networking with Shared Internet Access
Local Networking with
Shared Private Network
Access
Users can share access to a remote private network, such as a corporate office
LAN, while they continue to network locally. This can include indirect access to the
Internet through the private network’s Internet connection, as shown in Figure 2.
Figure 2 Local Networking with Remote Private Network Access
OfficeConnect
Dual 56K LAN Modem
Public telephone
network
Two analog POTs lines
Internet
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
OfficeConnect
Dual 56K LAN Modem
Private network
Public telephone
network
Two analog POTS lines
Dedicated or
leased line
connection
Mor e c onnec ted 3 Com
Sta tus Re set TX D D
1 2
1 2
4 3
1/2 3/4 3 4 RX
TX
LK RX LA N Re mo te Ac ces s S
yst em 15 00
WA N CO
Po we
r
BR I IS DN U
AN AL OG
SL OT 1
SL OT 2
ST AC KN ET CO NS OL E
SU PE R
ST AC
K
3 Com
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
Internet