Packetdriver for LNG-TCP/IP using serial driver and PPP encapsulation. You need a "SERv2" module present in the system (see lsmod). SERv2 modules are: rs232std, swiftlink and fifo64.
Supported baudrates are 300, 600, 1200, 2400, 4800, 9600, 38400, 57600.
The link speed also depends on the used serial interface!