In asynchronous transfer mode (ATM), 8 bits in the cell header that provide error checking of the header, but not the payload.There is no provision for error correction. See also ATM, cell, error control, header, and payload.
"HEC." YourDictionary, n.d. Web. 08 June 2018. <http://www.yourdictionary.com/hec>.
HEC. (n.d.). Retrieved June 08th, 2018, from http://www.yourdictionary.com/hec