1、1,Telephonecompaniesarepromotingvoicemailasanalternativetotheansweringmachine.Byrecordingmessagesfromcallerswhenasubscriberdoesnothaveaccesstohisorhertelephone, voicemailprovidesaservicesimilartothatofanansweringmachine.Whatisthecharacteristicofthevoicemail? A,