Identifies the requirement to receive an audible or visual message signal to indicate that messages are waiting.
NOTE 1: When this is a General Exchange Tariff offering, the EUCON and EUTEL fields must be populated.
VALID ENTRIES:
A = Audible Indicator
V = Visual Indicator
R = Remove
USAGE: This field is conditional.
NOTE 1: Optional when the ACT field on the ASR Form is "N" or "C", otherwise prohibited.
DATA CHARACTERISTICS: 1 alpha character
EXAMPLE: A