I think the original poster might be talking about the opposite of what you are talking about. I understood him to mean that he wants a device that stays connected to an Asterisk extension and plays any audio received over the connection through a loudspeaker. I don't see how a cassette player comes into this at all.
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Following along the lines of the previous suggestion, you could use an ATA in Hotline mode with an analog speakerphone, but the phone would have to be designed in such a manner that it if it were hung up upon or disconnected from the ATA, it would go right back off-hook and directly into speakerphone mode without intervention. I do not know of any analog speakerphones that will do this, but someone else might.
Unfortunately, I also do not know of any SIP or IAX products that would do this out of the box. However, it would be very easy to modify an open-source SIP or IAX softphone to do what you want. However, that may or may not be practical for your situation. If you really want this in a small "appliance" form factor, you could probably design and build a device that would run a softphone on an embedded CPU, but I suspect that even Morgan Stanley's IT department might not want to get into that scene :).
-Rusty
On 12/7/05, C F <[EMAIL PROTECTED]> wrote:
For starters, an old fashioned cassette player that holds the button
in with auto reverse will do, since when the power is out it will
still play it. Connect that to an ATA (radio shack sells a plug that
will connect to a phone line and take the input of a regular headphone
jack to the phone line). Take any ata and configure it as a hotline,
put the cassette player with a regulare analog phone on the port of
the ata, make sure the phone is off hook, so that the ata makes the
hot line call, and viola you are in asterisk. Of course other ways to
do it is: to use an external pager (bogan makes one), that allows
external MOH, and that uses a FXO port that you make sure asterisk
always keeps off hook.
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