Original Publication Date: 1999-Jun-01
Included in the Prior Art Database: 2002-Aug-16
The iDEN Advanced Packet Duplicator (APD) uses the Local Management Interface (LMI) proto- col for link integrity verification between the APD and the frame relay switch the APD is connected to. Status of the LMI links between the APD and the switch influences the impaired availablility level (IAL) of the APD as reported to the iDEN Dispatch Application Processor (DAP). There are 2 APDs per a given DAP. The DAP chooses the APD which has the highest IAL of the APDs to service a given dispatch call. In the event of both APDs having the same IAL, the load of dispatch calls is shared equal- ly between the two APDs. For this reason, it is imperative that an APD report its IAL to the DAP as quickly as possible so the DAP can use this informa- tion to choose the highest rated APD to serve dis- patch calls.