ARQ-M
... that the reliable ARQ-M communications protocol on shortwave radio allowed Telex messages to be sent internationally?
... that the reliable <b id="mwdw"><a href="./ARQ-M" id="mweA" rel="mw:WikiLink" title="ARQ-M">ARQ-M</a></b> communications protocol on shortwave radio allowed <a href="./Telex" id="mweQ" rel="mw:WikiLink" title="Telex">Telex</a> messages to be sent internationally?