One-way satmodems (DVB-IP modems ) use a return channel not based on communication with the satellite, such as telephone or cable.
Two-way satmodems (DVB-RCS modems, also called astromodems) employ a satellite-based return channel as well; they do not need another connection. DVB-RCS is ETSIstandardEN 301 790.
... sphincter is the skeletal muscle that allows voluntary control over urination.
In the human female, the urethra is about 1-1.5 inches (25-38 mm) long and opens in the ...