Have a strange issue at a customer, they went and replaced all of their old PoE switches with brand new HPE 5130 EI Switch Series.

Their PBX has been up and stable for several years with no recent changes, but since they change the switches they are having a problem with some their Yealink t-26 phones.

Seems that only the Yealinks are repeatedly rebooting whenever the user clicks the speaker button, otherwise the phones work properly.

Their Cisco and Polycom phones work fine, and the Yealinks were fine prior to the upgrade.

Anyone see anything like this before?