Hi, have a customer with a 2100 with a dedicated network for ip phones. Phones are registered and appear to be working but there is no audio on outside calls or when accessing voicemail. This is a sudden issue. System does not have voipdb, and has 1.50 software. Also, low battery alert is showing, but I am not looking forward to changing it. Don't know why they didn't design it so it could be changed without shutting down. Thanks all. (IP phones are the self- labelers)(phones can call each other and have audio between them)