Hi Bruce, I had an afterthought. Paging systems often have an FXO port on them that would allow you to trigger the night ringer and or an FXS port to play an announcement by connecting an ATA. I don't know why I didn't think of that first.
I also like that Velleman gadget that James suggested. They look cheap and cheerful. I guess you just need one for each incoming line. A closed relay is a closed relay so you should be able to just hook them up in parallel on the contact side. Dave On Wed, Nov 26, 2014 at 10:07 AM, David Donovan <[email protected]> wrote: > Hi Bruce, > > If they already have a paging system, check that out. If you're lucky > it's SIP enabled or the manufacturer has a SIP add-on interface. > > At the very least, they usually have an interface called 'night ringer' or > something along those lines. The ones I've seen use a 'dry contact' > interface. That means you trigger it by connecting the two wires from the > dry contact terminals in a short circuit. As for how to do that from > Asterisk, you could try something like this: > http://www.algosolutions.com/products/Audible-and-Visual-Alerting/8061.html > I've never used it but that's the kind of thing that would do the job. If > you feel more DIY, you could make something with a Phidgets relay board and > a little script > http://www.phidgets.com/products.php?category=9&product_id=1014_2. > > If they don't have a paging system or you don't want to touch it, you > could look at this thing. > http://www.algosolutions.com/products/Audible-and-Visual-Alerting/8180-sip-audio-alerter.html > Again, I haven't used it but it sounded like an interesting problem so I > did some Googling. It looks like you could just put it into the ring > group. Easy peasy. > > Hope that helps, let us know how it turns out. > > Dave > > > > > On Wed, Nov 26, 2014 at 9:19 AM, Bruce N <[email protected]> wrote: > >> Hi everyone, >> >> I have a client who is looking for couple ceiling speakers that will >> announce the ring when there is incoming ring. This is a big warehouse and >> they don't hear the sound and this is the only solution they want. They >> have analogue lines. What parts can do this? >> >> Thanks, >> Bruce >> > >
