About Us
AST’s Mission
Our Team
Be a Member
EGC Program
Careers @ AST
How AST Works
Why Work With AST?
Technologies of Interest
Standard Program FAQs
License Process
Services
AST Deals
Acquired Portfolios
Licensing Opportunities
News & Events
News
Events
Sell/License My Patents
IP3
fAST IP Login
Download Report
US6950498
05/18/2016
External detection of optional telephone services
Share Article
Back
