Information technology Telecommunications and information exchange between systems Private Integrated Services Network Interexchange signalling protocol Call Identification and Call Linkage Additional Network Feature ISO/IEC 21889:2001
ISO/IEC ISP 10612 is applicable to interworking units concerned with operating in the Open Systems
Interconnection (09) environment. It specifies a combination of OS1 base standards that collectively provide a
MAC relay function between LAN subnetworks.