3Com Dual 56K manual Simultaneous Dial-in and Dial-out Connections

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-inIf you configure the LAN Modem to make only one channel available for dial-in and Dial-out Calls calls, you can have one dial-in and one dial out call occurring simultaneously, as

shown in Figure 11.

Small Office LAN

Server

Telecommuter

Public telephone

network

OfficeConnect¤

Dual 56K LAN Modem

Two analog lines Internet

Figure 11 Simultaneous Dial-in and Dial-out Connections