We discussed the case of a circular transmitting loop, and developed a corresponding approximate inversion program which has been tested for 1 D layered Earth models and real data.

We poll the network interface anytime we enter the network driver (typically for transmitting a packet) and from the process scheduler's idle loop.

It was discussed the check principle structure, the codes' transmitting, closed loop check, reliability of the closed loop Telegraphic codes System with some reference circuit.