3Com Dual 56K User Manual page 26

26 C 2: D 56K LAN M
HAPTER UAL
Simultaneous Dial-in
Calls from Two Different
Locations
High-speed Dial-in Call
from One Location
Line Sharing with Dial-in
Calls
F D
ODEM UNCTIONALITY ESCRIPTION
If you configure the LAN Modem to make both channels available for dial-in calls,
each as a single channel connection, you can have simultaneous dial-in calls from
two different locations, as shown in Figure 12.
Telecommuter
Business traveler
Figure 12 Simultaneous Dial-in Connections from Two Different Remote Locations
If you configure the LAN Modem to make both channels available as a single,
Multilink connection for dial-in calls, then one high-speed dial-in call at a time is
possible, as shown in Figure 13.
Second small
office site
Figure 13 One High-Speed Dial-in Connection from a Single Location
With dial-in calls to the LAN Modem, whenever an open channel is created by an
incoming call via the LAN Site-to-Site dial-in scenario, the LAN Modem is designed
to make use of the already-open connection by returning any data packets to the
dial-in user on the open connection. This leaves the second analog channel free
for use, provided you have not set the LAN Modem to combine its two lines using
Multilink PPP. Without this line sharing feature, a separate, outgoing call would be
launched on the second channel during data transfers.
Public telephone
network
Two analog lines
Public telephone
network
Combining both
analog lines with Multilink
provides a single high-speed
connection
Small Office LAN
MODEM 1 MODEM 2 LAN Status
OfficeConnect Dual 56k LAN Modem
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OfficeConnect
Dual 56K LAN Modem
Small Office LAN
MODEM 1 MODEM 2 LAN Status
OfficeConnect Dual 56k LAN Modem
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OfficeConnect
Dual 56K LAN Modem
Server
Server