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CP-7925G-EX / multiple phones failing to register

There are 70 working 7925 phones, however we are installing 100 + new 7925 phones and 90 % of the phones are failing to register.

 

Call manager 9.1.2

 

The phones are grabbing the correct ip address, subnet, gateway and tftp address.  They are identical to a good working phone. 

The App Load ID on the new phones is "CP7925G-MFG-F.2.LOADS" , once a phone registers the App id shows

"CP7925G-1.4.3SR1.2.LOADS".

 

Messages that are on a failing phone are below.

Downloading AOM (1/1)

AOM installation failed

 

Status messages:

DNS unknown Host

CiscoCM1

Waiting on MIDP module installation

AOM installation failed

TFTP timeout

TFTP timeout

 

The phones that are failing are using the same tftp server that the good phones are using, however there is not any call managers listed under "Settings - Device information - Call manager". 

 

I'm not seeing a common denominator with the failinig phones and the working phones.

 

Any help would be greatly appreciated!!

 

 

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Just an update. 

Just an update. 

 

My problem was actually the 7925 phones were grabbing an ip address on the wrong vlan.  Once they grabbed an ip address on the correct vlan, they registered correctly.