The answer function on an analog line is accomplished by going off
hook. Unless the line is controlled by an automated device (like
answering machine) someone has to physically take the device off hook
to answer it. The ATA has no way to do it as all it gives is the FXS
signalling.
What exactly are you trying to accomplish?
Vikingeleoctronics makes a door box (E20 iirc) that is powered by an
analog line and can do auto answer when it gets the first ring.

On 4/25/11, Mike Diehl <mdi...@diehlnet.com> wrote:
> Hi all,
>
> Is it possible to send a SIP header to a PAP2T or SPAxxxx and cause the
> device
> to automatically answer?  I can do this with my Polycom phones and would
> like
> to do it with my ATA's.
>
> Any ideas?
>
> --
>
> Take care and have fun,
> Mike Diehl.
>
> --
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