<div>We used to deploy 100k to 1 million Cisco Telephony systems. We have pretty good experience in Enterprise Telephony integration. We are now building systems using Asterisk on a commercial grade platform. You'll need to design a High Availability switched infrastructure. The network becomes WAY more important in larger installations. It sounds like you'll be supporting an executive suite model where the tenants receive office and voice and data under an SLA of some kind? We have done this a few times if you want help putting the pieces together. IP networking expertise is not something you find with some of the offerings out there.
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<div>Bob</div>
<div><br><br>Arreva Communications<br> </div>
<div><a href="http://www.arrevausa.com">www.arrevausa.com</a></div>
<div><br>949-334-2022-SIP Connect<br>949-842-8450-Wireless<br>949-349-0209-Fax </div>