Edge Audio is primarily used to

• A. Encrypt signaling
• B. Optimize PSTN audio
• C. Load balance calls
• D. Enhance video quality

Answer: (B)

Edge Audio is designed to improve and optimize audio quality when voice traffic crosses between IP networks and the PSTN. By operating at the network edge where calls enter or leave the IP/PSTN path, it helps ensure clearer, more intelligible voice on circuits that can be prone to noise, jitter, and other PSTN impairments. This optimization typically involves selecting appropriate codecs and applying processing to mitigate common issues like packet loss and echo, so the recipient hears better audio even over legacy or congested links.

It isn’t primarily about encrypting signaling, distributing or balancing calls, or enhancing video quality. Those areas involve signaling security, call routing/load balancing, and video codecs or conferencing quality, respectively, rather than edge-focused audio optimization.