In order for the Onvif Device Manager to be able to fully connect to the VN-901T the following is recommended.
1. Make sure the VN-901T is running the latest firmware. Please go to: http://www.vicon-security.com/learn-and-support/software-downloads#vicon-camera-software-firmware
2. It will be necessary to access the cameras browser and disable WS-Security. Go to setup, under users, uncheck the WS-security box. The Onvif device manager has shown to have some issues when this box is checked.
*** PLEASE ALSO NOTE THAT SOME VMS REQUIRE WS-SECURITY TO BE ENABLED IN ORDER TO WORK WITH THE DEVICE ***
This maybe also applicable to the following models:
V-CELL-IP and V660V-P (Europe)
V920D and V921D
V922D and V923D
VN-901T encoder
V905-CUBE
CE202D-N and CE202D-WN
CE102D-NIR and CE102B-NI