That functionality is very trivial to implement.
The type of systems I build with web interfaces allow you to set timed 
options where calls outside of a certain time frame go right to voice 
mail or anything you want.  The timed conditions happen automatically.
It's a little over kill for what you want to do, but it gives you a ton 
of options later such as giving everyone in the house their own 
voicemail the emails them their messages, accepting inbound faxes (sent 
to email) transparently, and being able to use a voip phone (even 
software phone) to call out from your line from wherever you are (great 
way to call home for free from hotels with broadband!).

To plug it into your phone line you'd need an FXO device such as a X100P 
clone or Sipura 3000 device (voipsupply.com).
If you want to utilize existing phones you'll need an FXS device (Sipura 
3000 includes one) to plug the phone into asterisk; there are many to 
choose from on voipsupply.com.  A TDM400p card with one inbound 
(FXO=receives dialtone) and one outbound (FXS=creates dialtone) card

I'd be willing to help you set it up.  Once you get into it you'll be 
hooked!

JD

Kevin wrote:
> I know we have some Asterisk gurus on the list.  I'm wondering if it might
> fill a simple need (or maybe it's overkill).  I want to create a simple
> greeting on my home phone number during overnight hours that says "we're not
> taking calls right now, call back during the daytime" or something similar.
> I also need to have a whitelist of caller ID numbers that can always get
> through for emergencies (family, neighbors, etc.)  From what I have read, it
> seems like the dialplan features can do this.
>
> I do something similar today with my Cox phone service.  I created a
> whitelist of numbers that can always ring-in, then at night I dial a *
> command to activate it.  The trouble is that I often forget to dial the
> (same) * command in the morning to turn it off.
>
> I thought about using a modem in one of my linux boxes (maybe even my Tivo)
> with a bash script that sends AT commands in the evening and again in the
> morning.  Trouble is Cox uses the exact same * command to toggle on/off.  It
> would easily get messed up if one of the dial attempts missed.
>
> Sooo... enter Asterisk.  Maybe.  Since I'm not interested in VOIP phones,
> would I need a digium board to connect analog phones?  Thoughts?
>
> ...Kevin
>
>
>
> ---------------------------------------------------
> PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us
> To subscribe, unsubscribe, or to change  you mail settings:
> http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss
>   
---------------------------------------------------
PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us
To subscribe, unsubscribe, or to change  you mail settings:
http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss