The pattern can have between 1 and 49 characters.
The following are the valid formats for pattern types:
For regular patterns, [+*#0-9x][0-9x]{0,35}
For pattern ranges, [+0-9][0-9]{0,23}[:][+0-9][0-9]{0,23}
If you specify a pattern range, System Manager disables the Min, Max, and Emergency Call fields.
For patterns with Emergency number, [0-9]{0,35}