Polycom 1500/1800/2000/4000 manual Appendix a Disconnection Causes, IP Disconnection Causes

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

IP Disconnection Causes

Call Disconnection Causes

Disconnection Cause	Description
Disconnected by User	The user disconnected the endpoint from the conference.
Remote device did not open the	The endpoint did not open the encryption signaling channel.
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.
H323 call closed. Small bandwidth	The gatekeeper allocated insufficient bandwidth to the connection with
	the endpoint.
H323 call closed. No port left	There are no free ports left in the IP card.

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