Yeah, so that's the issue. The portable phone is currently plugged into the "PC" port on the phone. Before this firmware update, that wasn't a problem since I wasn't making use of the "Voice VLAN" value on the switch port, and the "VLAN" value was just set to the voice VLAN value.   Now that it seems I'm required to use this field, it looks like I'll need to connect those portable phones to their own port on the switch and use the voice VLAN value just as I did for the desktop phones. ... View more