Getting Started on RTTY
Icom Radios & Radio Command
Icom transceivers prior to the IC-746 and IC-756Pro could not
switch to
transmit via software command. The last of the "non-software PTT" rigs
were the IC-706mkIIg and the IC-756 (non-Pro) while the first Icom rigs
to support software PTT were the IC-746 and IC-756Pro.
Icom rigs that do not support software PTT are: IC-78, IC-251, IC-275,
IC-706, IC-706mkII, IC-706mkIIg, IC-707, IC-718, IC-725, IC-736, IC-738,
IC-751. IC-756, IC-761, IC-765, IC-775, IC-781, IC-821, IC-910, IC-970
Icom rigs that support software PTT are: IC-703, IC-746, IC-746Pro,
IC-756Pro, IC-756ProII, IC-756ProIII, IC-7000, IC-7200, IC-7400,
IC-7410, IC-7600, IC-7700, IC-7800. IC-9100
Thanks to Joe, W4TV for this list.