26CHAPTER 2: DUAL 56K LAN MODEM FUNCTIONALITY DESCRIPTION

Simultaneous Dial-inIf you configure the LAN Modem to make both channels available for dial-in calls, Calls from Two Different each as a single channel connection, you can have simultaneous dial-in calls from

Locations two different locations, as shown in Figure 12.

Telecommuter

Small Office LAN

Server

Telecommuter

Public telephone network

OfficeConnect¤

Dual 56K LAN Modem

Two analog lines

Busine

 

ss

tra

 

 

veler

Business traveler

Figure 12 Simultaneous Dial-in Connections from Two Different Remote Locations

High-speedDial-in Call If you configure the LAN Modem to make both channels available as a single, from One Location Multilink connection for dial-in calls, then one high-speed dial-in call at a time is

possible, as shown in Figure 13.

Small Office LAN

Server

Public telephone

networkOfficeConnect¤

Dual 56K LAN Modem

Second small

office site

Combining both

analog lines with Multilink provides a single high-speed connection

Figure 13 One High-Speed Dial-in Connection from a Single Location

Line Sharing with Dial-inWith dial-in calls to the LAN Modem, whenever an open channel is created by an Calls 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.

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3Com Dual 56K manual Locations two different locations, as shown in Figure, Possible, as shown in Figure