A message which is played to the called party before answering the call, in the most cases the message tells who is calling, the name or telephone number helping you to decide how to answer to the call and sometimes whether to answer it at all.
DID Number, DID Numbers, Local Telephone Numbers, VoIP Numbers, voip number, DIDs, 0800 Toll-Free, Fax, SMS, Porting, T.38, Virtual Phone Numbers, SIP Trunking, SIP trunk, Wholesale DID Numbers