-= Info about application 'DISA' =- 

[Synopsis]:
DISA (Direct Inward System Access)

[Description]:
DISA (Direct Inward System Access) -- Allows someone from outside
the telephone switch (PBX) to obtain an "internal" system dialtone
and to place calls from it as if they were placing a call from within
the switch. A user calls a number that connects to the DISA application
and is given dialtone. The user enters their passcode, followed by the
pound sign (#). If the passcode is correct, the user is then given
system dialtone on which a call may be placed. Obviously, this type
of access has SERIOUS security implications, and GREAT care must be
taken NOT to compromise your security.

There is a possibility of accessing DISA without password. Simply
exchange your password with no-password.

  Example: exten => s,1,DISA,no-password|local

but be aware of using this for your security compromising.

The arguments to this application (in extensions.conf) allow either
specification of a single global password (that everyone uses), or
individual passwords contained in a file. It also allow specification
of the context on which the user will be dialing. If no context is
specified, the DISA application defaults the context to "disa"
presumably that a normal system will have a special context set up
for DISA use with some or a lot of restrictions. The arguments are
one of the following:

    numeric-passcode
    numeric-passcode|context
    full-pathname-of-file-that-contains-passcodes

The file that contains the passcodes (if used) allows specification
of either just a passcode (defaulting to the "disa" context, or
passcode|context on each line of the file. The file may contain blank
lines, or comments starting with "#" or ";". In addition, the
above arguments may have |new-callerid-string appended to them, to
specify a new (different) callerid to be used for this call, for
example: numeric-passcode|context|"My Phone" <(234) 123-4567> or 
full-pathname-of-passcode-file|"My Phone" <(234) 123-4567>. Note that
in the case of specifying the numeric-passcode, the context must be
specified if the callerid is specified also.

If login is successful, the application parses the dialed number in
the specified (or default) context, and returns 0 with the new extension
context filled-in and the priority set to 1, so that the PBX may
re-apply the routing tables to it and complete the call normally.