A Central Office voicemail system permits a customer to monitor incoming calls and decide whether or not he wishes to take the call. When a call is made to a called party (customer) and the called party does not answer the phone the call is transferred to voicemail in the usual way. Additionally, a special...http://www.google.es/patents/US6337898?utm_source=gb-gplus-sharePatente US6337898 - Method for monitoring voicemail calls using ADSI capable CPE
Method for monitoring voicemail calls using ADSI capable CPE
