I have a DECT landline phone connected to an Optus supplied broadband cable modem. In the past whenever someone left a voicemail, a message notification icon was displayed. I have come to rely on this and it saves the need to call just to check if I have received a message. I discovered this week that this feature no longer works and as such, I missed some messages. Has something changed at Optus that no longer sends this data to my phone?