Serial Ip; Figure 16 - Serial Ip - red lion BT-6821-AT-AC User Manual

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Serial IP

This feature allows communication over the cellular network in two common setups. The first is a server communicating
with a remote serial-only device and the other, a serial-only device communicating with another remote serial-only
device. Serial IP is used to emulate a direct serial connection to the attached device, or to emulate a landline modem.
The modem becomes a transparent middleman routing data back and forth between the poller and the pollee. Serial IP
is most commonly used in telemetry applications such as meter reading and SCADA devices.
Figure 16 – Serial IP
When the modem is in Serial IP mode, IP packets intended for the attached serial device have their IP headers stripped
before being passed on to the device. This means that the serial device receives raw serial data that it can understand.
Inversely, when the serial device is sending data, the modem encapsulates this data in IP packets to be transmitted over-
the-air to the remote destination.
When a Serial IP server is running, the modem waits until a connection is made on the defined Serial IP port, then
triggers Serial IP mode. The incoming data will be relayed to the attached serial device. Any output from the serial device
will be sent to the IP of the remote computer that made the connection on the port that the remote computer used to
make the connection.
When using Serial IP, the modem configuration depends on the application requirements. A support note is available.