- Memory Leaks: This occurs when your phone basically doesn’t work. Your phone rings, but you can’t hear anything. You try to call your coworker, but it doesn’t dial.
- Board Failure: Signs of this type of failure is when you lose multiple phones all at once.
- Trunk Failure: Outbound and inbound calls don’t go through.
- Hard drive failure: This could be the result of an old machine. Your actual phone stops working and won’t turn on.
- Network failure: If it’s a network failure, your phone is fine, but without a network, you can’t do business.