A wireless engineer is performing a post verification of a wireless network.
Which two metrics does the engineer verify to ensure that the wireless network can support voice services? (Choose two.)
Click on the arrows to vote for the correct answer
A. B. C. D. E.BC.
When it comes to supporting voice services on a wireless network, there are a few key metrics that a wireless engineer must verify during post verification. Two of these metrics are:
The client device must have at least an -65 dBm RSSI: RSSI stands for Received Signal Strength Indicator, and it measures the strength of the signal being received by the client device from the access point (AP). A signal strength of at least -65 dBm is recommended for voice services, as it provides a strong and stable connection that can handle the bandwidth requirements of voice traffic.
The rate of retransmitted packets must be 20 percent or below: Retransmitted packets occur when packets of data are lost or corrupted during transmission, and must be re-sent. In a voice application, this can lead to dropped calls or poor call quality. Therefore, it is important to ensure that the rate of retransmitted packets is 20 percent or below in order to maintain high call quality.
Option A, stating that the coverage area must have a noise floor that does not exceed -87 dBm, is not necessarily a metric for supporting voice services, but rather a metric for overall network performance. A lower noise floor means less interference, which can improve network performance in general.
Option B, stating that the client device must have at least an -67 dBm RSSI, is too weak of a signal for supporting voice services. A signal strength of at least -65 dBm is recommended.
Option C, stating that the rate of retransmitted packets must be 15 percent or below, is not accurate. As stated earlier, the rate of retransmitted packets must be 20 percent or below for supporting voice services.
Therefore, the correct answers for this question are options E (the client device must have at least an -65 dBm RSSI) and D (the rate of retransmitted packets must be 20 percent or below).