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Upgrade CM 5.1.2 to 7.0(1)

Hi all,

I have a customer the wants to upgrade the CM versio to 7.0(1). On the cco i fount that to do that i need to go first to 5.1.3 and then to 7.0.1.Doing this i will run two firmware upgrade on the phones. Is there any way to make te upgrade and only make one firmware upgrade.

I was thinking in the folowing procedure:

1 - Install the 7.0(1) firmware file on the 5.1.2 CM.

2- configure on all the phones the new firmware in the firmware load field on the phone configuration.

3- Make the CM upgrade to 5.1.3, at this time the callmanager is with a diferente firmaware version but the phones will not upgrade.

4- Upgrade the CM to 7.0(1)

5- Verify that the firmware is the same on the phones.

6(optional)- Remove the firmware load field on the phones.

Can any one tell me is this a good procedure os if there is others to preform this upgrade.

Many thanks