Polycom (RMX) 1500 User Manual

RealPresence Collaboration Server (RMX) 1500/1800/2000/4000 Administrator’s Guide 

Polycom®, Inc. 

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● At the end of the installation and configuration process, to test the solution and the integration with 

the OCS, create an ongoing conference with two participants, one dial-in and one dial-out and 

connect them to the conference.

● If the active Alarm “SIP TLS: Registration server not responding” is displayed, stop and restart the 

OCS Pool Service.

● If the communication between the OCS and the Collaboration Server cannot be established, one of 

the possible causes can be that the Collaboration Server FQDN name is defined differently in the 

DNS, OCS and Collaboration Server. The name must be defined identically in all three devices, and 

defined as type A in the DNS. The definition of the Collaboration Server FQDN name in the DNS can 

be tested by pinging it and receiving the Collaboration Server signaling IP from the DNS in return.

● The communication between the OCS and the Collaboration Server can be checked in the Logger 

files:


SIP 401/407 reject messages indicate that the Collaboration Server is not configured as Trusted 

in the OCS and must be configured accordingly. 



SIP 404 reject indication indicates that the connection to the OCS was established successfully.

● Selecting Pause my Video in OC client causes the call to downgrade to audio only call if the call was 

not in Audio Only mode at all (the call was started as a video call). 
If the call is started as an audio only call and video is added to it, or if the call was started as video 

call and during the call it was changed to Audio Only and back to video, selecting Pause my Video 

will suspend it as required.

● Rarely, the OC client disconnects after 15 minutes. The OC client can be reconnected using the same 

dialing method in which they were previously connected (dial-in or dial-out).

● Rarely, all SIP endpoints disconnect at the same time. The SIP endpoint can be reconnected using 

the same dialing method in which they were previously connected (dial-in or dial-out).

Polycom Implementation and Maintenance services provide support for Polycom solution components only. 
Additional services for supported third-party Unified Communications (UC) environments integrated with 
Polycom solutions are available from Polycom Global Services and its certified Partners. These additional 
services will help customers successfully design, deploy, optimize and manage Polycom visual 
communications within their UC environments. 

ICE failure: Service 
credential denied. A/V 
Edge server credentials 
rejected by the OCS.

Service

This alarm indicates that the 
OCS does not configure with 
the.
Generated by the ICE stack.