Mitel 5240's and Windows Vista/ Windows 7

[hsearson]

I have a client with a 3300 running rel 9.0 and they just upgraded their computers to vista and windows 7.  They have 5200 series phones on their desk with the computer's patched into the back of them. Now I have watched this with my own eyes but when they reboot or turn off their computer it causes the phone to reset itself.  Has anyone else experienced this?

[Chakara]

  That would be funny if it wasn't so sad.  Upgrade the phone firmware or system.....

-Chak

[Mitel100]

The problem here is that the 5200 series phones can only communicate as high as 100 Mbps FD but your new laptops are communicating at 1000 Mbps FD.

I would recommend that you either try and add a power supply to the phone, or drop your NIC settings to 100 Mbps FD.

[mdavisjr]

I am the client mentioned above.
It was the network speed.  All of the new computers we were getting in had gigabit network cards.  Even though the switch is only 100Mb, I'm guessing that when Windows started up or shutdown the NIC, that it send some sort of auto-negotiate signal that the Mitel phones did not like.
I went to Device Manager and set the NIC to 100MB Full Duplex instead of auto negotiate and it fixed the problem.  Thank you guys!

I'm going to go test this on another machine with a 5220 doing the same thing just to verify that the fix can be duplicated.

[hsearson]

Thanks for the all the help guys.

[Chakara]

  Interesting.  Typically when I have setup auto negotiate on one end and static anything on the other, there have been duplex mismatched and performance goes down the drain.  Of course manually setting on both ends (PC and Phone) would solve this...but what a pain.

[ralph]

I was once told that if you set one end staticlly and the other auto, it will fall back to half duplex.  Not what you want on VoIP.   Anyone else aware of this?

Ralph

[Mitel100]

Yes, this is the case. When I was studing for my CCNA, this was one of the faults they throw at you to resolve. I always find the attached doc really helpful.

[ralph]

Thanks for the doc.   I've shared it our Mitel staff.

Ralph