Mitel Phone power but on display or dial tone.

[Supdup]

I wanted to see if anyone else has had this happen.


For about 2 week the Mitel phones when we come into the office are not working. All the VoIP phone(5330) have power because the display is lit but it is blank. There is no dial tone and the pc that connected to the ip phone work and can connect to the network and internet on problem.

When this happen we have used one of 2 option to get them back online.
1. Power the Mitel CP500 down and then back up and the phone start to come back online and working.
2. Reset the core switch and then the phone come back online and working.

the problem is when the phones go down there are no errors being report( or at least I am not see them) so there nothing to check to at least start trouble shoot the problem.

Any clue?

 

[wireman50]

Sounds like a network problem to me. Usually, but not always, a broadcast storm. Or a faulty patch cord causing similar problems. We have had both. When it next happens try disconnecting the phones one by one from the wall ports and see if that brings the rest back up.(assuming there are not thousands of course)

 

[Supdup]

We tried this on a dozen phone and here what we get.

unplug the phone power goes out wait 30 sec. plug it back up and phone will either come on and nothing else happen no boot screen nothing or the phone comes on and sit at the mitel boot screen.

 

[wireman50]

Yup, not seeing the network. On your core switch are there any signs of a broadcast storm?

 

[Supdup]

I no expert on the switch (HP) so don't no what to look for? Or commands to run to look for this. I do know that the phone are on there own vlan so would the broadcast storms effect or not effect the pc that are plug into the phones and a different vlan or not bacause the pc will still be up and work when the phone go down sometimes? It's crazy.