Yealink T43u not provisioning "no service" after multiple attempts

[Eliot · Accepted solution]

hi dselden63,

begin by adding your phone to the Zoom web portal. 

Note: Make sure to add your phone to the Zoom web portal before powering on a new phone for the first time or performing a factory reset on a previously-used phone. You can find your phone's model name and MAC address on the label located on the bottom or back of the phone.

Getting started with provisioning desk phones – Zoom Support

here are the directions for yealink factory reset

Resetting to factory default (Yealink) – Zoom Support

here are yealink troubleshooting directions

Yealink troubleshooting guide – Zoom Support

thanks,  eliot

[dselden63]

Thanks Ellot- I have done 10+ factory resets, added the phone to Zoom and tried to auto provision at least a dozen times...still "no service"

[Eliot]

have you tried assisted provisioning with url

https://provyp.zoom.us/api/v2/pbx/provisioning/Yealink/t43u

Yealink assisted provisioning guide – Zoom Support

[sachinzoom]

Hello @dselden63 

For ZTP to work on yealink phones,

make sure you have Ports 80,443 open to http://rps.yealink.com

Please see this article for more ports to whitelist, if your network is very restricted ( share with your network person 😞

Let us know how that goes

https://support.yealink.com/en/portal/knowledge/show?id=035c46eea77827eb20d53a4d

[enielsen]

As above -

- check firewall to see if blocking any of the needed traffic

- verify local dhcp not providing parameters overriding the yealink settings

- verify have yealink firmware as specified as needed by zoom (I've not seen this issue on yealink desktop phones, but could happen if is an old phone that has been powered off a long time perhaps?