Dahua Technology DHI-VTH1550CH-S, User Manual

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Set Enable Status to ON to activate SIP Server functions.
Press OK to save SIP server configuration.
4.2.5 Add VTO Stations
VTO stations are the external devices that VTH units connect to for two-way communication.
VTO stations typically contain a camera to send video information and can unlock doors and
gates from a command from VTH devices.
Press and hold Setting until the system displays the Password Verification dialog box.
Type your password and press OK.
Press VTO Config.
Add a main VTO or a VTO sub-station:

Add Main VTO
a) Enter the Main VTO Name, the VTO IP Address, User Name, and Password.
b) Switch the Enable Status to ON.

Add a VTO sub-station:
a) Enter Sub VTO/Fence Station Name, Sub VTO/Fence Station IP address, User
Name and Password.
b) Switch the Enable Status to ON.
c) Press the Left or Right Arrow to add additional VTO sub-stations.
Verify VTH Operation
4.3.1 Answering a Call from a VTO
To verify that a VTH unit is configured properly, make a test call from a VTO unit.

Dial the VTH room number from the VTO unit.
The VTH unit displays the video feed and the operating keys from the VTO if all settings
are configured properly.
Note in the image below that the Snapshot and Record keys are active. These active functions
indicate that the VTH has an SD card inserted in the unit.