Question: What does the APN-Aggregate-Max-Bitrate-DL AVP primarily indicate in relation to non-GBR bearers with the same APN, and what is the implication when its value exceeds 2^32-1?
Option 1: The minimum guaranteed bitrate for uplink transmission; when exceeded, it triggers a switch to GBR bearers.
Option 2: The maximum aggregate bitrate for downlink across all non-GBR bearers; when exceeded, the Extended-APN-AMBR-DL AVP is used for values over 2^32-1 but only for uplink.
Option 3: The average bitrate for downlink transmission across all bearers; when the value exceeds 2^32-1, it indicates a need to upgrade network capacity.
Option 4: The maximum aggregate bitrate for downlink across all non-GBR bearers; when the value to be transmitted exceeds 2^32-1, the Extended-APN-AMBR-DL AVP shall be used.
Explanation: This AVP indicates the maximum downlink bitrate for non-GBR bearers with the same APN. The correct answer reflects that this is about downlink and that values exceeding 2^32-1 necessitate using Extended-APN-AMBR-DL AVP, highlighting a nuanced understanding of bitrate management in telecom networks.