A Russian/URS Military system with some speculation that a number of ex-Eastern Bloc countries might also make use of this system. This signal is mainly 81 bd, pseudo random, one or two characters, 12 bits, usually encrypted. Operator chatter can sometimes be found in the clear using Baudot w/Cyrillic M2 alphabet. It is mainly a 2 ch system but there is a 40.5 bd signal that is a 1 ch variant. Most commonly found baud rates are 36.5, 40.5 for the 1 ch version and 73 and 81 for the 2 ch version.

Shift Common User

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125 Navy

500 Railway Authority

200,250,500, Military

1000,1500