Monitor audio quality on Yealink phones

[bradgarrison]

The last few days I have been troubleshooting some quality issues. While doing this I found a tool that has been very helpful and wanted to share it with the group.

It is easy to monitor the audio quality on a Yealink phone, and it can be done remotely. I was able to watch in real-time as a user was on a call.





Directions

• Log into the Yealink phone from the administrative portal. You can get the IP address by pressing the ok button on the phone. The default user/pass is admin/admin until it is changed.
• Go to the Settings tab
• Click on the Voice monitoring tab on the left
• Change the following settings:
• VQ RTCP-XR Session Report = Enabled
• VQ RTCP-XR Interval Report = Enabled
• Period for Interval Report = 5
• Display Report Options on Web = Enabled
• Voice RTCP-XR Report = Enabled
• Add the options you want to the Enabled column
• Click Confirm
• Make a call using this phone.
• On the top menu, go to Status
• Click on the RTP Status tab on the left

Now you can view the stats of the last call. The stats will also update every 5 seconds during the call. This value is set above in the "Period for Interval Report" settings. The value range is 5-20.

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	the 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
Packet loss	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 the 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

 

[whut]

@bradgarrison have you found the Yealink phone's reported MOS is the same or close to what is being reported in CDR page?

 

[bradgarrison]

@whut I didn't even know the CDR page had that detail. Now that I'm looking at it, the numbers are close but the Yealink page might have slightly lower numbers. When I say lower, I'm talking like 4.3 vs 4.5.

 

[whut]

Those are close enough for me!

 

[mcs3ss2]

Awesom guide, I did not know that was even possible within the phone. I had always been using CDR for call quality checks.