Telegraph transmission system with timing monitor - has cyclical timing criteria to ensure error free transmission to selected one of multi-terminal network

摘要

Telegraph transmission system with timing frame criteria to prevent overlap of telegram transmissions and a fast system restoration in the event of line interference or system failure in part or entirety. The system uses a cyclical timing algorithm to determine whether a station is the correct one to receive a transmission and whether it is in working order. Two determining time factors are the first time (t1) which is at least equal to the maximum transmission time (T) to the most distant terminal and a second time (t2) which is equal to the cyclical framing time (tz) of the system. Address codes and receive acknowledge levels between stations are checked against the algorithm and its equations tn=a.sn.t to verify station readiness to receive a telegram transmission, where a is a factor greater than 1 and sn is a time stacking and holding factor relating to transmission time to stations and the stations out of service.