ISO/IEC ISP 10612 is applicable to interworking units concerned with operating in the Open Systems Interconnection (OSI) Local Area Network environment. It specifies a combination of OSI Standards that collectively providc a MAC relay function.
This part of ISO/IEC ISP 10612 specifies requirements that are dependent an the type of subnetwork. It is applicable to an interworking unit which is attached to an ISO/IEC 8802-5 Token Ring LAN subnetwork and is relaying to another LAN subnetwork, not necessarily of the saure type.