Conferencing Entities Presence; Interactive Connectivity Establishment (Ice; Ice Guidelines - Polycom RealPresence 800s Administrator's Manual

Polycom® RealPresence Collaboration Server 800s Administrator's Guide
Table I-1
System Component
Management
LDAP

Conferencing Entities Presence

Conferencing entities (Meeting Rooms, Entry Queues and SIP Factories) can be registered
with the SIP server (Lync server) enabling the addition of these conferencing entities to the
buddy list while displaying their presence (availability status: Available, Offline, or Busy).
Lync Server client users can connect to conferencing entities directly from the buddy list.
The configuration of the environment to enable Presence, is usually done once the basic
configuration is completed.
For more details, see "Adding Presence to Conferencing Entities in the Buddy List" on page I-22.

Interactive Connectivity Establishment (ICE)

Interactive Connectivity Establishment (ICE) provides a structure/protocol to unify the
various NAT Traversal techniques that are used to cross firewalls.
It enables SIP based endpoints to connect while traversing a variety of firewalls that may
exist between the calling endpoint (local) and the MCU or called endpoint (remote). It is the
only way for remote Lync users to call into the enterprise without a VPN.

ICE Guidelines

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When ICE over UDP is blocked in the firewall UDP port, the ICE connection through the TCP
protocol is automatically used instead of UDP for fallback.
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I-2
SIP TLS - Encryption Key Support by System Component (Continued)
Key Generation Method
CSR
Collaboration Server ICE implementation complies with Microsoft ICE
implementation.
ICE can be implemented in an environment that includes a STUN server and a Relay
server (for example, Microsoft AV Edge server).
The firewall must be UDP enabled.
The Collaboration Server must have a unique account in the Active Directory and must
be registered with the Lync server.
ICE is supported with Collaboration Server Multiple Networks.
Ensure that the Collaboration Server system SIP signaling domain has been allowed on
the Lync Server edge server to which you are federating (if your deployment does not
include a DMA system).
Content sharing (BFCP protocol) is not supported in ICE environment.
Key Length (bits) Key generated by
Collaboration
2048
Server
Polycom, Inc.