[cisco-voip] CM upgrade to 6.x

[Matthew Saskin]

Not compatible between versions in any way. Once you cut the phones over 
the 6.x cluster, that's the cluster they use.

-matt

Wendy Bloom wrote:
>
> We are going to be upgrades our HW and SW to CM 6.x and Unity 5.x.
>
> Current configuration: 1 CMPub 4.x, 1 CMSub 4.x, 1 Unity 4.x; 7 
> locations – all have 2800 series routers, 3 locations have Voice Trunks
>
> All locations access the core VoIP servers via ATM, Ethernet over 
> Fiber, or T1 lines.
>
> We have SRST on the routers.
>
> A few of the locations are remote and have about 100 phones per 
> location. What I’m hoping to do is keep using the 4.x CM Subscriber at 
> one of remote locations, in case of network outages. Is 6.x backwards 
> compatible? Can this be done?
>
> Thanks,
>
> Wendy
>
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