Digi 90000566_H Connection Scenarios for Modem Emulation, Outgoing Modem Emulation Connection

Connection Scenarios for Modem Emulation

Connection Scenarios for Modem Emulation

Modem emulation can involve the following types of connection scenarios:

Outgoing Modem Emulation Connection

In an outgoing modem emulation connection, a serial device sends an ATDx.x.x.x:y command, which triggers the Digi device to establish a connection to destination IP=x.x.x.x, port=y.

Incoming Modem Emulation Connection

In an incoming modem emulation connection, a device on the network connects to port 50001 (50000+1 = 1st serial port). This incoming connection triggers the Digi device to generate a RING on the serial port. The device attached to the serial port will answer the RING and the connection is established.

Modem Emulation Pooling

Modem emulation pooling is a combination of Incoming Modem Emulation Connection and a hunt group. A device on the network connects to port 50000. The Digi device checks if a serial port configured for modem emulation is available. If so, it connects to the port, otherwise returns an error.

Modem Emulation Bridge

A modem emulation bridge is combination of Outgoing and Incoming Modem Emulation Connections, in which both serial devices require to talk to a modem. The first serial device connects to the second device using ATDx.x.x.x:y, the second device gets a RING and accepts the incoming connection.

262 Chapter 3 Modem Emulation Commands