In order to reproduce this issue you have to perform a fax call from a SG3 fax (connetted to Payton) to SG3 fax (connetted to other end-point).The call will be performed in G3 mode using V17 modulation instead of V34 in SG3.In attached log two calls ...

Trying to set a VLAN on SPA122 (Network-->Advanced settings-->VLAN) is possible to choose "Enable" and insert VLAN ID, but submitting new configuration weg GUI shows: "Changes cannot be applied while calls are in progress. Please try again when phone...