ASAI-Ethernet

Maintenance — Provides access to maintenance functions, the ability to save and restore configuration information, and to view error and security logs.

Port Status/Control — Provides access to port status and control data. Allows administrators to view status information and terminate client connections.

For MFB, these screens are located in DEFINITY Enterprise Communications Server Installation, Administration, and Maintenance of CallVisor ASAI over the DEFINITY LAN Gateway, 555-230-223.

For DEFINITY LAN Gateway application on MAPD, these screens are located in DEFINITY ECS CallVisor ASAI DEFINITY LAN Gateway over MAPD Installation, Administration, and Maintenance, 555-230-114.

System Operation

ASAI is a point-to-point protocol. It does not include network addressing elements that indicate a particular client to which a message should be sent. Instead, a 1-to-1 correspondence between ASAI BRI ports and clients ensures that messages are sent to the proper destination. To support this, the DEFINITY LAN Gateway application creates a set of “virtual” BRI ports on the circuit pack. Thus, to support ASAI messaging on an Ethernet network it is necessary to “map” the virtual BRI ports to particular clients.

By performing this mapping, the system software performs a function similar to a LAN brouter. (Thus, the DEFINITY LAN Gateway software is referred to as a brouter.) It bridges ASAI messages from an ISDN/BRI synchronous point-to-point network to an Ethernet TCP/IP asynchronous network. The ASAI layer 3 messages remain the same; however, the system uses a TCP “tunnel” protocol for transport instead of ISDN layer 2.

Figure 13-6illustrates the relationship among these elements.

Issue 7 May 1998 13-9

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Lucent Technologies 555-230-220 manual System Operation