distinctive alerting
Special ringing or call-waiting tone patterns sent by the network to convey information to a customer installation (CI) about the called number, the calling number, or the status of an automatic call request. [T1.401-1998]
Special ringing or call-waiting tone patterns sent by the network to convey information to a customer installation (CI) about the called number, the calling number, or the status of an automatic call request. [T1.401-1998]