C/C-ISO/IEC ISP 10609-28-99 (R2003)

1. Scope
 
ISO/IEC ISP is applicable to end systems concerned with operating in the Open Systems Interconnection (OSI) environment. It specifies a combination of OSI standards, which collectively provide the connection-mode Transport Service using the connection-mode Network Service.
 
This part of ISO/IEC ISP 10609 specifies the requirements for the Data Link Layer that apply specifically to configurations involving access to an ISDN subnetwork. The requirements specified in this part apply to Service Access Point Identifier (SAPI) of value 0 used to provide Data Link Layer services to a call control Layer 3 entity and to SAPI of value 16 used to provide Data Link Layer services to an X.25 Layer 3 entity.