[asterisk-users] Call files without permission for asterisk to read

[jg]

You could save the call file initially to "/var/spool/asterisk/tmp", then adjust the permissions 
as needed and necessary. Finally copy the call file into the "outgoing" directory. This also 
minimizes the chance that Asterisk tries to execute a partial file, although I don't know 
whether one still has to take care of issues like that.

jg