Each subscriber service type is configured with at least one service access point (SAP). A SAP identifies the customer interface point for a service on a Nokia 7450 ESS or 7750 SR OS (Figure: Service Access Point (SAP)). The SAP configuration requires that slot, MDA, and port and channel (7750 SR) information be specified. The slot, MDA, and port and channel parameters must be configured before provisioning a service (see the Cards, MDAs, and Ports section of the 7450 ESS, 7750 SR, 7950 XRS, and VSR Interface Configuration Guide).
A SAP is a local entity to the 7450 ESS and 7750 SR and is uniquely identified by:
the physical Ethernet port or SONET/SDH port or TDM channel (7750 SR)
the encapsulation type
the encapsulation identifier (ID)
Depending on the encapsulation, a physical port or channel can have more than one SAP associated with it. SAPs can only be created on ports or channels designated as ‟access” in the physical port configuration. SAPs cannot be created on ports designated as core-facing ‟network” ports as these ports have a different set of features enabled in software.
