UUCP Setting Parity
In some situations, you have to reset the parity because the system
that you are calling checks port parity and drops the line if it is wrong.
The expect-send couplet P_ZERO sets parity to zero:
foo =,-, "" P_ZERO "" \dA\pTE1V1X1Q0S2=255S12=255\r\c OK\r\EATDT\T\r\c CONNECT
In the same manner, P_EVEN sets parity to even (the
default), P_ODD sets it to odd, and P_ONE
sets it to one. This pseudo-send string can also be used in entries in the Systems file.