Question: In a 3GPP network utilizing the Adaptive Multi-Rate (AMR) speech codec with Source Controlled Rate (SCR) operation, what is a primary purpose of activating SCR in the uplink (transmitting path) as commanded by the network to User Equipment (UE)?
Option 1: To enhance voice quality during peak hours
Option 2: To reduce overall interference and load in the networks
Option 3: To increase the battery life of UE exclusively during video calls
Option 4: To prioritize data transmission over voice calls
Explanation: Activating Source Controlled Rate (SCR) operation in the uplink for AMR speech codec is primarily aimed at optimizing network resources. By considering speech inactivity, SCR reduces the average transmission rate, which in turn decreases the overall interference and load on the network, leading to more efficient network operations.