Polycom RealPresence 4000 Administrator's Manual page 1019

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Make sure that the IP address of the RMX Signaling Host is the same one defined as a trusted host
in Office Communications Server 2007/Lync Server 2010.
Polycom, Inc.
In the RMX Management pane, expand the Rarely Used list and click IP Network
Services ( ).
In the IP Network Services pane, double-click the Default IP Service (
entry.
The Default IP Service - Networking IP dialog box opens.
Make sure the IP Network Type is set to H.323 & SIP even though SIP will be the only
call setup used with Office Communications Server 2007.
Make sure that the correct parameters are defined for the Signaling Host IP Address,
Media Card 1 IP Address, Media Card 2 IP Address (RealPresence Collaboration Server
(RMX) 2000/4000 if necessary), Media Card 3 IP Address (RealPresence Collaboration
Server (RMX) 4000 if necessary), Media Card 4 IP Address (RealPresence Collaboration
Server (RMX) 4000 if necessary) and Subnet Mask.
Appendix H-Setting the RMX for Integration Into Microsoft Environment
, , or )
H-39