In asynchronous transfer mode (ATM) 3 bits in the cell header that distinguish between cells carrying user information and cells carrying service information. See also ATM, cell, header, and payload.
"PTI." YourDictionary, n.d. Web. 18 June 2018. <http://www.yourdictionary.com/pti>.
PTI. (n.d.). Retrieved June 18th, 2018, from http://www.yourdictionary.com/pti