Installation guide

Connection Scenarios for Modem Emulation
154 Chapter 3 Modem Emulation Commands
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.