asterisk-voicemail-imapstorage 1:16.2.1~dfsg-2ubuntu1 (riscv64 binary) in ubuntu focal

 Asterisk is an Open Source PBX and telephony toolkit.
 .
 This package includes an IMAP-based voicemail storage: storing the
 voicemail in a remote IMAP mail boxes. While more complex to set up,
 it may be useful in some settings.
 .
 For more information about the Asterisk PBX, have a look at the Asterisk
 package.