[asterisk-users] automatic call pickup

[Andrew Joakimsen]

See the documentation for DISA, it is restricted by context. So
assuming you already have your dialplan configured securely, there are
no security implications.

Be aware that the behavior of the phones change when you dial through
DISA, you can no longer use features such as "redial." That is because
the SIP call the phone places is to that extension, and DISA takes the
DTMF signals after the call is already answered.

Another option could be to auto-dial call pickup and make the users
dial on-hook (if the phone can do that). I have something like that on
my Polycom 501 for shared line appearance (i need to take it off --
SLA currently is very poor, caller id is broken, for one). When I
pickup my Polycom it dials the shared line. When I dial on-hook it
calls without using the shared line.

On Wed, Oct 8, 2008 at 3:58 AM, Vieri <rentorbuy at yahoo.com> wrote:
>
> --- On Tue, 10/7/08, Andrew Joakimsen <joakimsen at gmail.com> wrote:
>
>> I am not sure if it is possible to somehow invoke a function
>> to pick
>> up the call via dialplan, if it is a combination of that
>> function and
>> DISA should do what you need.
>
>
> Thanks!
>
> I could configure the ATAs to "auto-dial" a custom "destination" which would then call the command Pickup() passing it the appropriate parameters by checking the CallerID. After the Pickup() cmd has been executed I would call DISA without a password.
>
> There could be security issues of course. The only "check" I would do is based on the caller's ID (basically the extension number).
>
> Can a caller ID be spoofed? What other filtering logic can be applied for dialplan security?
> I've read this doc:
> http://www.voip-info.org/wiki/view/Asterisk+security+dialplan
> but is there more information elsewhere?
>
> Vieri
>
>
>
>
>
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