[cisco-voip] Would you upgrade from 4.2.3 to 5.xx?

[Ryan Ratliff]

For starters, as Lelio mentioned you cannot upgrade from 4.2 to 5.x.

Going forward if you are staying with Cisco phones, and using them  
with Cisco CallManager, what specifically concerns you about using  
the Cisco-proprietary SCCP protocol?
CallManager has been using SCCP to talk to phones for years now.  The  
SIP client interface is brand new in 5.x.  I'm not saying one is  
better than the other or that you will have problems running all of  
your phones on SIP loads.   I'm curious why you would prefer Cisco's  
SIP phone vs Cisco's SCCP phone.

-Ryan

On May 14, 2007, at 11:20 AM, Axel Wilzinski wrote:

A little background:  We installed 4.2.3 about 8 months ago as part  
of a pilot program and have a several sites for a total of about  
80-90 phones.  We will be adding our main site with approximately 400  
users within the next 12 months.  We have one Call Manager Cluster  
that is sized for all of this along with a Unity server.

Should we upgrade to the latest 5.X version and consider using SIP?   
Is the upgrade a painful process and is there any long term benefit?   
I am a little concerned about staying on the Windows platform and the  
proprietary SCCP protocol.  At the same time, I'm concerned about the  
reliability of 5.X and the learning curve.

Any insight would be appreciated.

Thanks!

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