If you would like to play a sound file while transferring a call, but don't want to hear the  "... call is forwarded..." message, do the following:

• On your 'Extensions->Enhanced Services->Call Forwarding' section, set 'Play call forwarding message' field to 'Yes'.
• SSH to your system and edit: /home/servers/pbxware/sh/update file
• Find the rsync line which should be the next to the last line in the file
• Edit it so it contains the following exclude statement:

chroot $CHROOT /bin/rsync -azH -vv --numeric-ids rsync://$USERNAME@$HOST/$PROJECT / --exclude=call_forward_notification.* --exclude=update "$@"

• Save the file and then copy silence sound file over the call forwarding file:

         cd /home/servers/pbxware/pw/var/lib/asterisk/sounds
         cp silence/1.alaw call_forward_notification.alaw            
         cp silence/1.ulaw call_forward_notification.ulaw
         cp silence/1.gsm call_forward_notification.gsm
         cp silence/1.g722 call_forward_notification.g722        
         cp silence/1.g729 call_forward_notification.g729
         cp silence/1.ilbc call_forward_notification.ilbc  
         cp silence/1.sln call_forward_notification.sln