There are four conferencing servers
server-managed group IM.
See how to install Front End
Enables multiparty data
See how to
install Web Conferencing Server.
Conferencing Server: Enables
audio and video peer-to-peer between communications and
audio and video conferencing.The
A/V Conferencing Server can be collocated with the pool
Front End Server or deployed in the pool on a separate
computer. When deployed on a separate computer, the
Audio/Video Conferencing Server can support up to 250
participants and six presenters within a single session.
See how to
install Audio\Video Conferencing Server.
Telephony Conferencing Server:
Enables audio conference integration with
The IM Conferencing Server and
Telephony Conferencing Server always run as separate
processes on the Standard Edition server or Enterprise
Edition Front End Server. The Web Conferencing Server
and A/V Conferencing Server optionally may be deployed
on separate computers within an Enterprise Pool. Unless
an enterprise has extraordinary performance and
availability requirements, the simpler, less expensive,
and therefore recommended choice for most organizations
is to collocate all conferencing servers on a Standard
Edition server or on Enterprise pool Front End Servers.
Question: What is MCU?
Multipoint Control Unit (MCU):
It is a conferencing server which manages and
co-ordinates use of a media type during the course of a
meeting. The media type includes data collaboration,
group IM, audio & video, & multiparty audio
There are three
types of edge servers as follows:
Access Edge Server:
Validates and forwards IM traffic between internal and
external users. The Live Communications Server 2005
Access Proxy with a new name.
See how to install
Access Edge Server.
Web Conferencing Edge Server:
Enables data collaboration with external users.
See how to
install Web Conferencing Edge Server.
A/V Edge Server:
Enables audio and video conferencing and A/V
peer-to-peer communications with external Communicator
See how to
install A/V Edge Server.
These three edge servers can be
installed together on a single computer or separately on
three computers. The recommended deployment for most
organizations is, for reasons of economy and simplicity,
to collocate the Web Conferencing Edge Server with the
Access Edge Server, but to install the A/V Edge Server,
which requires greater bandwidth, on a separate
computer. Group IM and data collaboration with external
users also requires deploying an HTTP reverse proxy in
the perimeter network
the four main types of multimedia conferencing:
: An IM conversation among three or more parties.Users
Server distribution lists as contacts.
Microsoft Office Communicator 2007 client allows
expansion of distribution lists through a Web service
exposed on the server. This expansion allows users to
invite one or more individual members of the group to an
IM session. Although groups of up to 1000 members can be
expanded, IM sessions can include
no more than 100 members.
Data collaboration is managed by the
Web Conferencing Server, which can be collocated with
Enterprise pool Front End Server or deployed
in the same pool but on a separate computer. The data
itself is stored in a file share created by an
Communications Server 2007 also enables data
collaboration with external users. The Web
Conferencing Edge Server, which is deployed in the
network perimeter, provides the bridge between the Web
Conferencing Server and external users.
Server 2007 supports multiparty A/V (audio/video)
conferencing. Users can specify A/V when scheduling a
conference or can add audio or video to an existing IM
conversation or conference call. Managing multiparty
audio and video sessions is the job of the A/V
Conferencing Server. Office
Communications Server 2007 also extends audio and video
conferencing to external users. The Audio/Video
Edge Server acts as a media relay for the transmission
of both audio and video signals across corporate
firewalls. This makes it possible to share audio and
video with external users. The Audio/Video Edge Server
can be collocated with the Access Edge Server or
installed on a separate computer in the perimeter
Office Communications Server
2007 supports connectivity with the Public Switched
Telephone Network through integration with an external
Audio Conferencing Provider (ACP).
This provides PSTN conferencing over an external bridge,
with no interaction with internal VoIP audio
integration is managed by the Telephony Conferencing
Server, which always runs as a separate process on
either a Standard Edition server or Enterprise Edition
Front End Server.
Meeting participants fall into three groups:
organizers, presenters, or attendees:
user who creates and initiates the meeting.
Presenter. A user
who is authorized to present information at a meeting,
using whatever media is supported. A meeting organizer
is by definition also a presenter and determines who
else may be a presenter. A presenter can also promote an
attendee to the role of presenter either before or
during the meeting.
Attendee. A user
who has been invited to attend a meeting but who is not
authorized to act as a presenter.
Based on their locations and credentials the users
can be divided broadly into internal and external users
Who have Active Directory credentials within the
enterprise and connect from locations inside the
Those who either temporarily or permanently connect to
an enterprise from locations outside the corporate
firewall. They may or may not have Active Directory
credentials. Office Communications Server 2007 provides
conferencing support for the following types of external
have a persistent Active Directory identity within
the enterprise. They include employees working at
home or on the road, and other remote workers, such
as trusted vendors, who have been granted enterprise
credentials for their terms of service. Remote users
can create and join conferences and act as
possess valid credentials with federated partners
and are therefore treated as authenticated by Office
Communications Server 2007. Federated users can join
conferences and act as presenters, but they cannot
create conferences in federated enterprises.
Users without an Active Directory identity and who
are not federated with the enterprise.