Identifies the requirement to provide a customer who is on an established call with the ability to add another party to perform a three way conference.
NOTE 1: The transfer feature allows the initiator to drop their connection without disconnecting the remaining parties.
NOTE 2: When this is a General Exchange Tariff offering, the EUCON and EUTEL fields must be populated.
VALID ENTRIES:
A = 3 way calling
B = 3 way calling with transfer
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