Polycom DOC2702A Manuel D’Utilisation

Polycom, Inc.

Appendix A

Disconnection Causes

If a participant was unable to connect to a conference or was disconnected from a 

conference, the Connection Status tab in the Participant Properties dialog box indicates the 

call disconnection cause. In some cases, a possible solution may be displayed.
A video participant who is unable to connect the video channels, but is able to connect as an 

audio only participant, is referred to as a Secondary participant. For Secondary participants, 

the Connection Status tab in the Participant Properties dialog box indicates the video 

disconnection cause. In some cases, a possible solution may be indicated.
The table below lists the call disconnection causes that can be displayed in the Call 

Disconnection Cause field and provides an explanation of each message 

Disconnected by User

The user disconnected the endpoint from the 
conference. 

Remote device did not open the 
encryption signaling channel

The endpoint did not open the encryption signaling 
channel. 

Remote devices selected encryption 
algorithm does not match the local 
selected encryption algorithm

The encryption algorithm selected by the endpoint does 
not match the MCU's encryption algorithm. 

Resources deficiency

Insufficient resources available. 

Call close. Call closed by MCU

The MCU disconnected the call.

H323 call close. No port left for audio

Insufficient audio ports.

H323 call close. No port left for video

The required video ports exceed the number of ports 
allocated to video in fixed ports.

H323 call close. No port left for FECC

The required data ports exceed the number of ports 
allocated to data in fixed ports.

H323 call close. No control port left

The required control ports exceed the number of ports 
allocated to control data in fixed ports.

H323 call close. No port left for videocont

The required video content ports exceed the number of 
ports allocated to video content in fixed ports.