[Asterisk-Users] MOH from RCA jack?

[Rich Adamson]

> > Been around asterisk for two-plus years, but need a little input from the
> > list on this topic.
> > 
> > Have a potential client that wants to replace their old key system with *,
> > but they want to integrate a commercial message service (they pay a monthly 
> > fee to have special MOH messages generated) into their system. The messages 
> > are essentially delivered to this customer via older generation audio 
> > equipment that interfaces to their key system via a standard audio RCA jack.
> > (We're reseaching other alternative deliver mechanisms such as mp3's, etc, 
> > from the supplier, but have to assume for now that we need to inject MOH 
> > audio into asterisk via this RCA jack.)
> > 
> > Does anyone have a relatively high audio quanlity method of interfacing 
> > such an external audio device into asterisk in a reliable way via an
> > RCA jack?
> > 
> 
> Rich,
> 
> 	First, you will need an RCA to 1/8" cable from Radio Shack or 
> something.  Next, you will need a sound card in the machine.  USB audio 
> interfaces are cool too (and they usually have a high SN ratio).
> 
> 	Then you need to setup a custom MOH class and use arecord:
> 
> http://linuxcommand.org/man_pages/arecord1.html
> 
> 	I haven't done this, but I was intrigued by your question and thought 
> I'd look into it.  Let us know how it turns out!

The usb audio interface sounds very cool! Have you played with any
that has a line-in jack or have any specific device recommendations?

(Wondering now if such a device could be made to work as an asterisk
overhead paging system cabled to an amplifier, etc.)