Re: Ham modem
TQA's post stated that people are moving from Pactor modems to sat phones for data transmission. That implies that they already have a SSB/Pactor setup, so cost of installation/acquisition of equipment is not a factor.
My remark about "delusion" refers to these factors:
1. satphone data links are nowhere near as easy or trouble-free as generally believed;
2. a significant on-the-air cost is attendent to data transmissions via satphone;
3. data transmission via Pactor 3 and, especially Pactor 4 is very likely to be achieved at a higher rate than via satphone, particularly Iridium.
In any case, the two systems are not really comparable.