Yealink VC400 User Manual page 100

User Guide for the VC400 Video Conferencing System
If the system fails to call, you can troubleshoot the problems according to the following
prompts:
Prompts
Call Failed Busy Here
Call Failed Remote
endpoint refused call
Network disconnected
Call Failed Request Time
Out
Maximum number of
sessions reached
During a video call, the call duration and video of remote system are displayed on the display
device.
88
Remote system rejects your SIP call.

Remote system does not answer your SIP call.

Remote system has reached maximum sessions when

you place a SIP call.
Remote system rejects your H.323 call

Remote system does not answer your H.323 call.

Remote system has reached maximum sessions when

you place an H.323 call.
Local network is disconnected
Remote system network anomaly

Remote system is powered off.

Local system has reached maximum sessions.
Description
.