This establishes the transmit envelope as:
G-13. RENVELOPE SUBCOMMAND
This subcommand allows the operator to set the envelope which is removed from a message
on reception. This sequence never appears in message storage and is used for communication
a. The envelope consists of zero to eight characters of start sequence, and zero to sixteen
characters of stop sequence. These sequences are entered as hexadecimal digits representing
b. If more than the required characters are specified, or a hexadecimal digit does not corres-
pond to an ASCII character, error message No. 10 is printed.
c. If a message is being received when the RENVELOPE subcommand is selected, error
message No. 19 is printed, no change is made, and the subcommand is complete.