The audio quality can easily be monitored in a Yealink device. If your customer experience audio issues, you can activate the monitoring on a Yealink device. Please follow the steps below:
- Login into you Yealink device
- Go to "Settings" in the top-menu
- Go to "Voice monitoring" and set the following options:
Now press "Confirm" and make a test call for at least two minutes. After the test call, you can see the results:
- Go to "Settings" in the top-menu
- Go to "RTP Status" in the left-menu
Here you can find the following information:
| Start Time | The exact start time of the call | End Time | The exact end time of the call |
| Local user | SIP account used for the call | Remote user | Internal number user |
| Local IP | local IP address of the SIP phone | Remote IP | The IP-address from Kwebbl used for the call |
| Local port | local port used for the call | Remote port | Remote port used for the call |
| Local CODEC | Local CODEC used for the call | Remote CODEC | CODEC used from Kwebbl |
| Jitter | indicating variations in packet arrival time | JitterBufferMax | indicating variations in packet arrival time |
| Packetloss | The amount of packets lost during the call | NetworkPacketLossRate | The amount of packets lost during the call |
| MOS-LQ | Quality score Listener | MOS-CQ | Quality score conversation |
Extra information:
Packet Loss - If Packets are lost during a call, the user will hear an audio drop or 'glitch'. In most scenarios the packets are lost in the local network or internet connection from the customer.
MOS - Mean Opinion Score - is a measure used to give a call a score. The MOS is expressed as a single rational number, typically in the range 1–5, where 1 is lowest perceived quality, and 5 is the highest perceived quality. VoIP calls often are in the 3.5 to 4.2 MOS range. The following chart can be used as a guide for VoIP MOS testing and a good comparison for voice quality.
| 4.3 - 5.0 | Very satisfied |
| 4.0 - 4.3 | Satisfied |
| 3.6 - 4.0 | Some users are satisfied |
| 3.1 - 3.6 | Many users dissatisfied |
| 2.6 - 3.1 | Nearly all users are dissatisfied |
| 1.0 - 2.6 | All users are dissatisfied |