User's Manual

9.13. Operating Mode change

The TERMINAL or external device can request the io200 to configure itself into different

operational modes. When going from different subscriber modes, the io200 only needs to

update its operation parameters. However, when going to special modes (i.e. programming

mode), the io200 needs to perform a reconfiguration (warm re-start). The following diagrams

illustrate the mode transitions. The TERMINAL is responsible for re-initializing the transport

layer interface and uses the correct protocol for the new selected mode. Some modes use

the multiplexer interface, while others are a simple UART without any multiplexing.

The following diagram illustrates the io200 entering a mode in which the GSM27.010

multiplexer is not currently active. The most typical is after the power-up sequence.

Figure 20. Invoking GSM27.010 Multiplexer

The following diagram illustrates the TERMINAL changing the io200 operational mode, which

does not require the io200 to reconfigure.

Figure 21. Non-Reconfigure Mode Change

The following diagram illustrates the TERMINAL changing the io200 operational mode which

does require the io200 to reconfigure and the new mode supports the GSM27.10 multiplexer.

Figure 22. Reconfigure Mode Change with Mux

TERMINAL