Communications protocol for digital telemetry system

A method for controlling access of a plurality of information packets to and from a connecting digital telemetry cartridge, each packet containing data from at least one well-logging tool along a tool bus, comprising the following steps:

• providing a transmission window of preprogrammed timed length and a selected starting delay to each information packet of the downhole well-logging tool string;
• receiving a frame start command from the digital telemetry cartridge;
• activating said starting delay for said provided window;
• transmitting continuously the data from connecting tools along the tool bus until said starting delay is completed;
• transmitting data continuously from a particular information packet until the end of said time window, thereby repeatingly transmitting information packet data from well-logging tools to the digital telemetry cartridge;
• and
• switching all of the information packets to the receive mode, whereby information transmitted by the digital telemetry cartridge can be received by the well-logging tools along the tool bus.