[misterhouse-users] ans_package end-of-call detection (was: IVR system)

[John M. <jo...@in...>]

On Monday 27 August 2001 01:11, Walter Leemput (ETM) wrote:
> Hi John,
>
> I ve a small question concerning your IVR sw.
> When recording a message, how do you manage to stop the recording when =
the
> caller hangup? Do you check busy signal (caller has hang up) or do you
> record a fixed length message (for example 30 sec) and stop recording. =
I
> ask this because with my voice modem im not able to receive the busy si=
gnal
> (code  b), when the modem is in record mode. Only when the modem is in
> playmode then the modem provides a busy sugnal (code b) when caller han=
gup.
> Mabe you have some suggestions?
> Thanks in advance.

My modem doesn't generate the busy code, either.  I tell the modem to lis=
ten
for silence (#VSD=3D1), and set the sensitivity to the middle setting (#V=
SS=3D1).
 The modem then generates quiet and silence codes during recording (\x10q=
 and
\x10s) for each 2 seconds of quiet or silence detected.  (The difference
between quiet and silence is essentially that if the modem hasn't heard a=
ny
sound at all, it generates silence, but if there was sound and now there
isn't, it generates quiet).

Through trial and error, I came up with this formula which works for my
phone:  If I get 8 seconds of quiet in a row, or a total of 30 seconds of
quiet, then it hangs up.  It's kind of arbitrary...

I haven't set a time limit on calls, although that's probably a great ide=
a
for an option!


--
John Martin                                         jm...@mi...

"Love to eat them mousies / Mousie's what I love to eat. / Bite they
little heads off / Nibble on they tiny feet."  -- B. Kliban