Microsoft only suppports SIP over TCP, so you need to be running version 1.6 of Asterisk, or you need to employ a gateway product between the Microsoft and Asterisk environments that will translate SIP/TCP to SIP/UDP.

If you search online you will find some articles for setup between OCS and Asterisk 1.6.

Mike



On 5/26/2010 9:52 AM, Douglas Pickett wrote:
Does anyone have any experiences with trying to integrate Asterisk or other Open Source PBX with Microsoft's UC/OCS/Exchange environment?

I've searched through the MS docs, and all I can find is commercial platforms (Aastra MX-One, Cisco, Avaya, ...) that are supported. There is an "Open Interoperability Program" - as far as I can tell "Open" means that they're open to you trying to get your hardware to inter-operate. Presumably there is significant cost in this open process.

I have found some docs online talking about tying Asterisk into Exchange 2007 - Exchange seems to be the core of all of MS's UC stuff - but has anyone local done this?

Thoughts?

Thanks,
Doug.

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