Identifies the telephone number of the person named in the GCON field.
USAGE: This field is conditional.
NOTE 1: Required when the GCON field is populated, otherwise prohibited.
DATA CHARACTERISTICS: 14 numeric characters (excluding 3 preprinted hyphens)
EXAMPLE: 2 0 1 - 9 8 8 - 7 6 2 3 - 1 0 1 2