The Cable VoIP interworks with the IP network through the Hybrid Fiber Coaxial (HFC) network. The core network provides the voice services through the IP network while the access network provides voices services through the HFC network. The HFC network combines both the optical cables and the coaxial cables to utilize broadband transmission and multi-channel TV broadcasting services.
The HFC network also provides supplementary services such as telephone calls, fax, and remote metering. Recently, the HFC added an IP-based packet transmission function improving the quality of the services and enhancing its competitiveness compared to other media.

Korea Digital Cable Laboratories (KLABS), a research institute established to support cable operators, invited members in March 2003 and has been carrying out standardization research activities for the cable businesses in the Korean market.
KLABS carries out standardization, authentication of systems, and performance/quality/function test for the Service Operator (SO). With the approval of the backbone network business by the Ministry of the Information and Communication for the MSO in March 2006, KLABS will focus on standardization related to the VoIP business.
As a special member of KLABS, Telcoware has actively participated in standardization activities and contributed to the standardization of the cable VoIP. Currently, Telcoware plans to secure markets for its VoIP solution and plans to launch various supplementary services related to VoIP.