ITU‐T's Technical Reports and Specifications 281 Table 7 – Products which support Open Access Network IP‐MPLS Network The L2/L3 hybrid bearer mode is used in the Open Access Network flexible aggregation/backbone layer scenarios. Residential HSI and VoIP services are transparently transmitted to RSP networks. Residential IPTV services are transmitted to the PE through L2VPN, and the PE forwards the services to the ASBR through L3VPN.