Hello, This is Digimon Masters.

We apologize for the Channel Down occuring randomly in different map. We are closely monitoring all channel from all the servers to determine which are affected. If you got disconnected without any notice, reason, etc. We suggest to login back to automatically switch Channel, you'll be allocated on the list available once you've successfully login.
 

Should you have any login issues please visit My QnA section listed under the Support tab of our official Website http://www.joymax.com/dmo/.

Again we apologize for the inconvenience this may have caused. Thank you!