On the other hand, if high availability is not a
requirement and simplicity and economy are more important, the Standard Edition server
would be more appropriate. We discussed the differences between these two options earlier in
this chapter, so we won??™t rehash the pros and cons of the two options here.
The next question you need to ask is where your staff is located. Microsoft recommends that
if your organization is geographically dispersed and connected across various wide area networks
Microsoft Office Communications Server 2007 ??? Chapter 2 55
(WANs), you should place a Standard Edition server or an Enterprise pool in each local site.
I agree. The addition of new and expanded audio and video features in OCS 2007 requires
greater bandwidth. You can achieve a better user experience with a local server or pool than you
can by using the centralized model servicing remote sites, as in Live Communications Server 2005.
Another reason you might want to go with local servers at your sites is if you have more
than 100 users at each site. Again, bandwidth is the main consideration here, as it is if you
want to allow external users access to internal Web conferences and A/V conferences. In this
case, you should probably deploy a local Web Conferencing Edge Server and A/V Edge
Server due to the higher bandwidth requirements of this traffi c.
Keep in mind that anytime you allow external user access you??™re going to need an
Access Edge Server. You will also need an HTTP reverse proxy for those external users to
download Address Book fi les, expand distribution lists, and download meeting content for
Web conferences.
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