sˈɪskoʊ ˌeɪtʃdˌiːˌɛlsˈiː sˈiː ˌeɪtʃdˌiːˌɛlsˈiː ɪz ɐn ɛkstˈɛnʃən tə ðə hˈaɪlˈɛvəl dˈeɪɾə lˈɪŋk kəntɹˈoʊl ˌeɪtʃdˌiːˌɛlsˈiː nˈɛtwɜːk pɹˈoʊɾəkˌɑːl, ænd wʌz kɹiːˈeɪɾᵻd baɪ sˈɪskoʊ sˈɪstəmz, ˈɪŋk.
Cisco HDLC (cHDLC) is an extension to the High-Level Data Link Control (HDLC) network protocol, and was created by Cisco Systems, Inc.