how do i enter code number 7 in the radio?

suppose you have a 4 digit pin eg 2537 then use the first 4 numbers on the radio to enter this pin code as follows.
when prompted to code in enter 2537 as follows:
enter 2 by pressing 1 twice,
enter 5 by pressing 2 five times,
enter 3 by pressing 3 three times,
then enter 7 by pressing 4 seven times.

RND
November 2006