[cisco-voip] CallManager OS Confusion?

[Dark Fiber]

I have two callmanagers (publisher and subscriber) that are both running the
following OS:

2000.4.2sr16

And the CallManager version is 4.1(3)sr4d

I also have two IPCC Express Premium servers running OS:

2000.4.3aSR4

And IPCC version 4.0(5)_Build042

When I go to look for OS upgrades on the Cisco site I see version numbers
that are all over the place.

2000.4.4a sr10 (Aug. 21 2007)
2000.4.5a sr2 (Aug. 21 2007)
2003.1.1 sr7 (Aug. 21 2007)
2003.1.2a sr2 (Aug. 21 2007)


I recognize that two of them are for Windows Server 2000 and two of them are
for Windows Server 2003.

I assume if I want / have to stay with 2000 for now I would have to choose
from either:

 2000.4.4a sr10 (Aug. 21 2007)
2000.4.5a sr2 (Aug. 21 2007)

>From the version numbers you would think one is more up to date then the
other since .5 is higher then .4, but since the dates are the same it would
seem that they are both equal in terms of being "up to date".

Anyone want to shed some light on this?  I have to admit I am being lazy,
and honestly don't want to have to read through 4 different readme's to
understand the pro's and con's of them all.

I want to get things up to date and secure, but I am also trying to avoid
any sort of major upgrade right now.  I would love to have one consistent OS
across the four servers if possible but I suppose there are alot of other
factors that will come into play.

Anyone have any thoughts regarding this?  Becoming quite the pain to keep
track of the various versions, and now I have to bring in a couple of CER
servers too so I am trying to get a handle on all of this before I begin.

Thanks!
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