Topic Last Modified: 2011-05-02
The Microsoft Lync Server 2010 perimeter network is home to three edge services, each of which handles a particular type of traffic across the corporate firewall:
- The Access Edge service, formerly known as the Access Proxy,
handles all SIP traffic crossing the corporate firewall. The Access
Edge service is required for all external user scenarios, including
conferencing, remote user access, federation, and public IM
connectivity.
- The Web Conferencing Edge service proxies Persistent Shared
Object Model (PSOM) traffic between the Web Conferencing service
and external clients. External conference traffic must be
authorized by the Web Conferencing Edge service before it is
forwarded to the Web Conferencing service. The Web Conferencing
Edge service requires that external clients use TLS connections and
obtain a conference session key.
- The A/V Edge service provides a single trusted connection point
through which audio and video traffic enters and exits your
network. With an A/V Edge service, users can:
- Add audio and video data to meetings with external
participants.
- Share audio and video directly with an external user
(point-to-point).
- Share their desktop and applications with external users
through the Application Sharing Server, using IM and
conferencing.
- The A/V Edge service also handles audio for Enterprise Voice
for external users.
- Add audio and video data to meetings with external
participants.
For details about Edge Server configurations and topologies, see Planning for External User Access in the Planning documentation.
You must deploy an HTTP reverse proxy in your perimeter network to support participation of remote and federated users in IM and conferencing. The reverse proxy manages distribution-group expansion, address book file download, access to meeting content (such as slides) for remote and federated users, and software updates to clients and devices.
