Plug power adapter in the power outlet in the wall. Plug the power cord in the unit.
Turn on the power switch.
Power Indicator OFF
Make sure the power indicator is ON. If auxiliary video input is used on TV,
Select the appropriate video input for TV.
No image is displayed on LCD screen
Be sure the RJ-45 wire is plugged into the "WAN" jack directly on the VT640P.
The unit is not responding when the "OK" button is pressed
Plug RJ-45 cable into "WAN" jack on the unit.
Plug RJ-45 cable from the Internet device into "WAN" jack on the unit.
Can not dial an IP address
Increase light on the image and reduce back lighting.
Video of local view is dark
Aim the VT640P at a strong white light source momentarily.
Increase the room light level.
Video in local view has a red cast
Hang up and call again. Make sure the remote video phone is compatible with H.323
standard. Ask the other party call you.
Video connection is not established correctly
Probable cause is bad connection (noisy line). Hang up and try again. This time, ask
the other party to call you.
Green or yellow blocks appear in the remote picture
Your VT640P is reliable and easy to use. If you encounter any problem while using this
product, please refer to the table below for possible solutions.
Other problems
LAN/Firewall with Packet Filter
With a DHCP server connected
Without a DHCP server connected
Working with a Gatekeeper
Making a Call
Before making a video call
Making a video call
Making Adjustments
Using OSD menus
Configuration
Password Checking
System Setup
Bandwidth Setup
Remote Update
Configuration Changed
Password
Change Password
Phonebook
Add
Search
InBox
OutBox
Restore factory settings
OSD Menu Tree
Trouble Shooting
Error messages in bootup sequence
Error messages in changing System Setup Settings
Other problems
Tech Support
Limited Warranty
FCC Statement
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