With the exception of call control,
everything that we have discussed up to this point as being a key piece of the ???unifi ed
communications??? world was being wrapped into this package. Let??™s talk about some of the
more important features of the LCS 2005 product. Figure 1.9 shows LCS 2005 as seen
via MOC 2005.
Figure 1.9 LCS 2005 (As Seen via MOC 2005)
Secure IM
Microsoft was wise enough to recognize that communications going across IM needed the
same encryption capability that e-mail solutions were already using. We had to be able to
secure these IMs so that they were not passing in clear text, internally, to federated (outside
third-party LCS implementation) partners, and to remote users working from home. To
ensure that these IMs were secure, Microsoft provided for the use of the Transport Layer
Security (TLS) protocol. TLS works in a client/server handshake arrangement, whereby the
18 Chapter 1 ??? Unifi ed Communications
client initiates the communication to the server, and the server selects the strongest cipher
and hash function and notifi es the client. The client can then check the server??™s certifi cate
for authenticity, and then begin communication. This was a major step in solidifying the
place of presence in the corporate world. We could guarantee that communication would
be secure, protecting confi dential company information and also meeting regulatory
requirements.
Public IM Connectivity
Honestly, without the ability to talk to the outside world, having an internal IM solution is
incomplete.
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