Re: VoIP Intercom?

We have a number of stations, some of them in the same building on a

> single ethernet switch, and some of them in another building somewhere > else in the world but with internet or intranet connections to that > switch. > These stations need to be linked with an intercom, using external > hardware. This should act like a party line, where one unit can press > a talk button and be heard on all the other units. > Selective calling features or multiple channels would be nice, but not > essental. There will be fewer than ten total units in place. > Does anyone have any suggestion for a device that does this as a > simple standalone device, preferably with minimum configuration? I > know Telex makes some VOIP modules which can be integrated with their > intercom frames, but they all seem to require a central switch.

This should be almost trivially easy to roll your own -- around an IP-enabled micro-controller (something only a little smarter than a Basic STAMP(tm), and using IP multicast.

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Robert Bonomi
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