Design for supporting the multimedia emergency VoIP using PSTN and IP network. - Okjo Jeong; Il-Jin Lee; Shin-Gak Kang (ICHIT, 2009)

Study on Emergency Services for VoIP Based on IP Network vs. Domestic Emergency Network. - IlJin Lee; Okjo Jeong; ShinGak Kang (ICHIT (2), 2011)