+- Yealink Forums (http://forum.yealink.com/forum)
+-- Forum: Video Collaboration (/forumdisplay.php?fid=5)
+--- Forum: VP530 (/forumdisplay.php?fid=25)
+--- Thread: VP530 Bad Sound (/showthread.php?tid=237)
Pages: 1 2
VP530 Bad Sound - apsaras - 02-15-2013 11:40 PM
Hello
We have an installation with few VP530 with Asterisk 1.8.20 configured to work with g711a and the sound quality is very bad. We tried latest firmware, we tried to change hand set, we also tried speaker but the problem is the same.
The sound is like you have have your nose blocked and talking. The problem is the same to all VP530. We tried G722, Asterisk 1.4 but we get the same results.
Please advice.
RE: VP530 Bad Sound - Dawson.Cai - 02-18-2013 11:45 AM
hello apsaras,
May I know the Hardware version of your VP530. Please find this information from the path: Menu->Status->Phone.
please send the information to me by email(dawson@yealink.com).
Thanks.
RE: VP530 Bad Sound - cyberoldie - 05-12-2013 04:28 AM
I have installed a VP530 to test as possible replacement for all our Grandstream phones and to recommend to our customers.
The sound on the VP530 is terrible. I know of no other way to describe it. I have no problem hearing others, but anyone with whom I am speaking from the BP530 tells me that the sound is constantly clipping and they are loosing speach. There is no change in this poor behavior if I try a different CODEC, and it happens when no video is engaged. The phone is aon a GB lan, and connected to internet via 15 MBP cable modem. Switch is in adjacent city connected via T3.
Firmware version is 23.70.0.41
Hardware version is 12041.201.18.0.8
If this cannot be corrected, Yealink may be disqualified from consideration as product for our firm to recommend to Fortune 100 clients.
Please respond promptly
RE: VP530 Bad Sound - cyberoldie - 05-14-2013 09:44 PM
3gipmoden, thank you for your reply. I do not understand and would apppreciate some elaboration. Thank you
RE: VP530 Bad Sound - pmterp - 07-10-2013 11:56 PM
We installed the VP530 for a client wishing for the video option and has proven to be a poor choice. The problem we have is with the audio quality for the first few seconds of the call. The problem does not occur on any of the T26's or T28's in the same office, only the VP530's. I brought one back to my office for testing and had the same experience. We had our vendor replace the device and the new one is no better. I've tried several codecs and it seems to have the lease impact on 722 but is still noticeable.
My question (I'm not here only to rant) is: Can we adjust the jitter buffer on this phone some how? On the other Yealink phones it's under audio but I cannot locate it on this model (firmware .10 or .40) and wonder if it may help.
RE: VP530 Bad Sound - briankelly63 - 07-11-2013 12:54 AM
I would suggest that you use Wireshark to capture the RTP audio stream from this phone to see how it sounds before it enters your PBX or elsewhere. You could also send that to Yealink support.
RE: VP530 Bad Sound - pmterp - 07-11-2013 01:28 AM
(07-11-2013 12:54 AM)briankelly63 Wrote: I would suggest that you use Wireshark to capture the RTP audio stream from this phone to see how it sounds before it enters your PBX or elsewhere. You could also send that to Yealink support.
Thanks for the suggestion Brian. Do you know of a walk through or instructions on doing this that you could point me to? Otherwise, I'll research it.
RE: VP530 Bad Sound - briankelly63 - 07-11-2013 04:37 AM
Here's a start...
http://www.linuxjournal.com/article/9398
http://www.youtube.com/watch?v=U0QABcTD-xc
http://www.youtube.com/watch?v=y-4UQSXkqig
http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0CCwQFjAA&url=http%3A%2F%2Fwww.eecs.yorku.ca%2Fcourse_archive%2F2011-12%2FF%2F3213%2FProject%2Fguide.pdf&ei=_MPdUbuLIbiu4APiuwE&usg=AFQjCNEf96HaCOqFL-xF93IXdBLLzH56FQ&bvm=bv.48705608,d.dmg&cad=rja
There's quite a bit on the Wireshark site also, they have a book too.
http://www.wireshark.org/
there are a number of things on youtube also. The trick is getting Wireshark in the loop. If you have a switch that does port mirroring that would be one option. You link the port on the switch with the phone attached to a port that the pc running Wireshark is connected to so it can "see" the packets. The job of a switch is normally to isolate the packets so by turning on port mirroring the packets will be sent to both ports. Another way is to use a laptop with the phone connected to the network interface and bridge it to the wireless interface.
I believe you can also use a version of wincap or its linux equivalent to capture the info on the server and then read it with Wireshark.
RE: VP530 Bad Sound - pmterp - 07-12-2013 02:36 AM
Great info, thanks. I'll do some testing the next few days and see what I find.
RE: VP530 Bad Sound - Yealink Support - 07-15-2013 04:32 PM
(07-10-2013 11:56 PM)pmterp Wrote: We installed the VP530 for a client wishing for the video option and has proven to be a poor choice. The problem we have is with the audio quality for the first few seconds of the call. The problem does not occur on any of the T26's or T28's in the same office, only the VP530's. I brought one back to my office for testing and had the same experience. We had our vendor replace the device and the new one is no better. I've tried several codecs and it seems to have the lease impact on 722 but is still noticeable.
My question (I'm not here only to rant) is: Can we adjust the jitter buffer on this phone some how? On the other Yealink phones it's under audio but I cannot locate it on this model (firmware .10 or .40) and wonder if it may help.
Hi Pmterp,
1. So you mean when you make the video call between two VP530, the voice quality for the first few seconds is bad? You can't hear clearly each other?
2. Could you provide PCAP trace, syslog(level 6) and config.bin file to us, so we can analyze?
Before you export the syslog, please set log level as 6, and reboot the phone, then click Start,and reproduce the issue, then click Stop,and export the trace, syslog, config,bin to us.
(About where to export these files, please refer to attached screenshot.)
These three files are very important for us, hope you can kindly understand.
3. Could you let us know more information about this client? What kind of project?(If you think you can't public these information here, you can send to support@yealink.com)
4. And could you let us know where are you from, and where you buy the phone? So i can introduce our special technical support engineer and sales to provide you better support.
Thanks.