This DisplayString object, up to 64 bytes, is a string identifier for a CAS (Channel Associated Signaling) variant and serves as the table's index. Since different countries and telephony systems use different CAS signaling conventions, this name lets an admin identify and select among multiple configured signaling variants on the card. An engineer setting up a new international trunk would create or reference an entry with a variant name matching the specific CAS signaling standard required for that country's telephony network.