[cisco-voip] upgrade 2000 phones at 40 branch through the WAN

wael ahmed el mezain wael733 at hotmail.com
Mon Jul 20 14:06:44 EDT 2009



hello,
 
I have client has ccm 4.1 (one Pub - 3 Subs) with about 2000 phones at +40 branch, and going to upgrade to ccm 7.x
 
Most of the remote sites has 1 MB or less (could be 512 or 384) WAN link to the HQ.
 
Is there any problem if we are going to do the phones upgrade for all the sites at the same time (after the CCMs upgrades using the DMA tool)?
 
I used to get the best solution from this group; anyone has any suggestion/idea for this case to decrease the downtime as much as we can with min risk?
 
Thanks,
Wael Ahmed
CCIE Voice # 24778
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