3Com 3C888 User Guide - Page 25

Dial-in Functionality, Dial-in Users, Dial-in Global Parameters, Simultaneous Dial-in

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Dial-in Functionality 25 Dial-in Functionality When you set up the LAN Modem for dial-in support, you can configure up to ten designated Dial-in Users to dial in to the local LAN. In addition, you must configure Dial-in Global Parameters which apply to all dial-in calls. When you configure Dial-in Global Parameters, you choose whether to allow one or both channels to be used for dial-in calls. In addition, you choose whether to set up all dial-in connections as single channel calls or Multilinkenabled calls, and you also set the number of rings before the LAN Modem answers the incoming data call. Depending upon your choice, the following typical calling scenarios become possible: Simultaneous Dial-in and Dial-out Calls If you configure the LAN Modem to make only one channel available for dial-in calls, you can have one dial-in and one dial out call occurring simultaneously, as shown in Figure 11. Small Office LAN ISDN LAN M3oCd8e9m2 Server Message MODEM 1 MODEM 2 AA CD RD SD OH AA CD RD SD OH Alert Power LAN Status TX COLL 1 2 3 4 OfficeConnect Dual 56k LAN Modem OfficeConnect¤ Dual 56K LAN Modem Public telephone network Two analog lines S2TAT3US 4 TX COLL1 LAN B1 B2 ALERT POWEIRSODKN Telecommuter Internet Figure 11 Simultaneous Dial-in and Dial-out Connections

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Dial-in Functionality
25
Dial-in Functionality
When you set up the LAN Modem for dial-in support, you can configure up to ten
designated
Dial-in Users
to dial in to the local LAN. In addition, you must
configure
Dial-in Global Parameters
which apply to all dial-in calls.
When you configure Dial-in Global Parameters, you choose whether to allow one
or both channels to be used for dial-in calls. In addition, you choose whether to
set up all dial-in connections as single channel calls or Multilink-
enabled calls, and you also set the number of rings before the LAN Modem
answers the incoming data call. Depending upon your choice, the following
typical calling scenarios become possible:
Simultaneous Dial-in
and Dial-out Calls
If you configure the LAN Modem to make only one channel available for dial-in
calls, you can have one dial-in and one dial out call occurring simultaneously, as
shown in Figure 11.
Figure 11
Simultaneous Dial-in and Dial-out Connections
Small Office LAN
Server
OfficeConnect
¤
Dual 56K LAN Modem
Two analog lines
Telecommuter
Internet
Public telephone
network