What does TCP/IP mean? TCP/IP stands for Transmission Control Protocol/Internet Protocol, which is a set of networking protocols that allows two or more computers to communicate. The Defense Data Network, part of the Department of Defense, developed TCP/IP, and it has been widely adopted as a networking standard. For more information, you may consult several TCP/IP-related FAQs at the FAQ.org website.
The customer support phone number of Suntrust Ach Department is 800.752.2515 / 800.382.3232 (Click phone number to call).
Contact Us. 1  If you have any other questions at all about education loans, call SunTrust. 2  If you are inquiring about a Custom Choice LoanÂ® or a Graduate Business School Loan, call 866.232.3889. 3  If you are inquiring about a Union FederalÂ® Private Student Loan, call 866.513.8445.