Nortel jAZZ X-6000 User Manual page 19

You can attach one or more voice messages currently in your mailbox to your message
before sending it. You cannot attach a message marked Private.
1 Before or after recording a message, press 7 0 for Message Options, then 7 for
Add Attachment.
2 Enter the message number of the message that you want to attach to your
unsent message, then press #.
19
7 7
0