www.voip-info.org/wiki/view/Asterisk+config+voicemail.conf schrieb:
Read back caller's telephone number prior to playing the incoming message, and just after announcing the date and time the message was left. This setting takes a yes or no value. If the administrator wants the caller's phone number to be heard prior to playing back a voicemail message, this option should be set to yes. The default value for saycid is no. This setting is only available in versions of Asterisk with advanced voicemail feature support.