Check what Codec's it's using too. I've run into some issues with
letting the phone/PBX choose a codec. Especially regarding packet
size. Locking it to PCMU cleared up the problems. The different phone
models negotiated the codecs differently, so different models would
either have the problem, or not.
On 10/22/2021 3:06 PM, TJ Trout wrote:
I had the same issue with some grandstream wifi phones, switched to
ethernet still the same, swapped to a different firmware still the
same, swapped phones to a different model and all was cured, but not
before wasting a ton of time troubleshooting the network
On Fri, Oct 22, 2021 at 12:58 PM <[email protected]
<mailto:[email protected]>> wrote:
VoIP issues are almost always network issues. Like 99% of the time.
It sounds like you’ve looked for a network issue, but if it’s at
all possible to look harder then look harder.
*From:* AF <[email protected]
<mailto:[email protected]>> *On Behalf Of
*[email protected] <mailto:[email protected]>
*Sent:* Friday, October 22, 2021 10:39 AM
*To:* [email protected] <mailto:[email protected]>
*Subject:* [AFMUG] Yealink Phones
Good morning all,
We have recently ran into major issues using Yealink phones,
particularly T54W and T57W. Calls are broken and dropping. We have
determined the ISP and internal networking is not the issue due to
the fact that these issues are not specific to one customer. Does
anyone have experience these products they would like to share the
do’s and don’t’s with the Yealink platform? We have been making
small adjustment to the voice settings of the hardware but are not
having any luck. We are not showing any packet loss between
customer and cloud. We are using Unifi switches and Mikrotik
RB2011 firewall. We also head similar results using a SonicWALL.
VOIP traffic is all travels though the Mikrotik and LAN uses the
Sonic wall. Quality issues are becoming more and more frequent
but are still very random. Yealink support is looking into this
but not moving fast enough. Thank you in advance for any
information you can share. I am open to any suggestions at this
point. If there is a better suited platform to ask this question
please let me know. I figured I would start with the smartest
group of people I know.
Darrick Potter
Structured Cabling and Security
517 797 3710 ext 110
[email protected] <mailto:[email protected]>
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