I can use webcallback and virtual toll free call now, thanks!
then I found another problem. did that I misunderstand?
my account 888433 is voxalot lite . ServicesVoxLite ($15 USD / yr)
For a small annual fee, a VoxLite account offers all of the Voxalot Basic functionality, plus the advanced Voxalot functions such as Smart Call Connection and Web Call back.
With a VoxLite account you can:
Set one SIP registrations for inbound calls
Set up Call Connection rules
Use Web Call Back
Make Smart Calls (balancing call quality and costs)
Make free calls to other voxalot members
Make free calls to over 2000+ other SIP networks
Receive calls to your voxalot number
Set up Voice Service Providers for outbound calls to normal telephone numbers
Activate or deactivate voice mail
Receive voice mail as a sound file (WAV file) in your email inbox
Create a speed dial directory
Get free support from the community support forums.
Connect to your Voxalot account using a soft phone, wifi mobile, Analog Telephone Adapter or using one of the 200+ access numbers around the world listed on SIP Broker.
Use our branded Virtual Toll Free button
above is what I see on voxalot website. the last line write I can use branded virtual toll free button. but when I tried, I get the wrong message as picture :
